ORGANOMETALLIC COMPOUND, LIGHT-EMITTING DEVICE INCLUDING THE SAME, AND ELECTRONIC APPARATUS INCLUDING THE LIGHT-EMITTING DEVICE

Abstract

An organometallic compound is represented by Formula 1. A light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode and including an emission layer, and the organometallic compound. An electronic apparatus includes the light-emitting device.

##STR00001##

The description of Formula 1 is provided in the specification.

Claims

1. A light-emitting device comprising: a first electrode; a second electrode facing the first electrode; an interlayer between the first electrode and the second electrode and comprising an emission layer; and at least one organometallic compound represented by Formula 1: ##STR00152## wherein in Formula 1, M is a transition metal, CY.sub.2 to CY.sub.5 are each independently a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, Y.sub.2 to Y.sub.4 are each independently C or N, A.sub.1 to A.sub.4 are each independently a chemical bond, O, or S, T.sub.1 to T.sub.3 are each independently a single bond, a double bond, *—N[(L.sub.1).sub.b1-(R.sub.1a)]—*′, *—B(R.sub.1a)—*′, *—P(R.sub.1a)—*′, *—C(R.sub.1a)(R.sub.1b)—*′, *—Si(R.sub.1a)(R.sub.1b)—*′, *—Ge(R.sub.1a)(R.sub.1b)—*′, *—Se—*′, *—O—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O).sub.2—*′, *—C(R.sub.1a)═*′, *═C(R.sub.1a)—*′, *—C(R.sub.1a)═C(R.sub.1b)—*′, *—C(═S)—*′, or *—C≡C—*′, a1 to a3 are each independently an integer from 1 to 3, Z.sub.1 is a single bond, *—N[(L.sub.2).sub.b2-(R.sub.2a)]—*′, *—B(R.sub.2a)—*′, *—P(R.sub.2a)—*′, *—C(R.sub.2a)(R.sub.2b)—*′, *—Si(R.sub.2a)(R.sub.2b)—*′, *—Ge(R.sub.2a)(R.sub.2b)—*′, *—S—*′, *—Se—*′, *—O—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O).sub.2—*′, *—C(R.sub.2a)=*′, *═C(R.sub.2a)—*′, *—C(R.sub.2a)═C(R.sub.2b)—*′, *—C(═S)—*′, or *—C≡C—*′, c1 is 0 or 1, and *′ each indicate a binding site to a neighboring atom, and L.sub.1 and L.sub.2 are each independently a single bond, a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, b1 and b2 are each independently an integer from 1 to 3, X.sub.11 is N or C(R.sub.11), X.sub.12 is N or C(R.sub.12), R.sub.11 to R.sub.13, R.sub.2 to R.sub.5, R.sub.1a, R.sub.1b, R.sub.2a, and R.sub.2b are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkenyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkynyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 alkoxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 aryloxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 arylthio group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.1)(Q.sub.2)(Q.sub.3), —N(Q.sub.1)(Q.sub.2), —B(Q.sub.1)(Q.sub.2), —C(═O)(Q.sub.1), —S(═O).sub.2(Q.sub.1), or —P(═O)(Q.sub.1)(Q.sub.2), d2 to d5 are each independently an integer from 0 to 10, NHet is a group comprising at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group, n1 is an integer from 1 to 3, two or more neighboring groups of R.sub.11 to R.sub.13, R.sub.2 to R.sub.5, R.sub.1a, R.sub.1b, R.sub.2a, and R.sub.2b are optionally bonded to each other to form a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.2-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, R.sub.10a is: deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group; a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, or a C.sub.1-C.sub.60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.11)(Q.sub.12)(Q.sub.13), —N(Q.sub.11)(Q.sub.12), —B(Q.sub.11)(Q.sub.12), —C(═O)(Q.sub.11), —S(═O).sub.2(Q.sub.11), —P(═O)(Q.sub.11)(Q.sub.12), or a combination thereof; a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, or a C.sub.6-C.sub.60 arylthio group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, a C.sub.1-C.sub.60 alkoxy group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.21)(Q.sub.22)(Q.sub.23), —N(Q.sub.21)(Q.sub.22), —B(Q.sub.21)(Q.sub.22), —C(—O)(Q.sub.21), —S(—O).sub.2(Q.sub.21), —P(═O)(Q.sub.21)(Q.sub.22), or a combination thereof; or —Si(Q.sub.31)(Q.sub.32)(Q.sub.33), —N(Q.sub.31)(Q.sub.32), —B(Q.sub.31)(Q.sub.32), —C(—O)(Q.sub.31), —S(—O).sub.2(Q.sub.31), or —P(═O)(Q.sub.31)(Q.sub.32), wherein Q.sub.1 to Q.sub.3, Q.sub.11 to Q.sub.13, Q.sub.21 to Q.sub.23, and Q.sub.31 to Q.sub.33 are each independently: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; a C.sub.1-C.sub.60 alkyl group; a C.sub.2-C.sub.60 alkenyl group; a C.sub.2-C.sub.60 alkynyl group; a C.sub.1-C.sub.60 alkoxy group; or a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C.sub.1-C.sub.60 alkyl group, a C.sub.1-C.sub.60 alkoxy group, a phenyl group, a biphenyl group, or a combination thereof.

2. The light-emitting device of claim 1, wherein the first electrode is an anode, the second electrode is a cathode, the interlayer comprises: the at least one organometallic compound; a hole transport region between the first electrode and the emission layer; and an electron transport region between the emission layer and the second electrode, the hole transport region comprises a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or a combination thereof, and the electron transport region comprises a hole blocking layer, an electron transport layer, an electron injection layer, or a combination thereof.

3. The light-emitting device of claim 1, wherein the emission layer comprises the at least one organometallic compound.

4. The light-emitting device of claim 3, wherein the emission layer further comprises a host, and an amount of the at least one organometallic compound is in a range of about 0.01 parts by weight to about 49.99 parts by weight, based on 100 parts by weight of the emission layer.

5. The light-emitting device of claim 3, wherein the emission layer emits light having a maximum emission wavelength in a range of about 400 nm to about 500 nm.

6. An electronic apparatus comprising the light-emitting device of claim 1.

7. The electronic apparatus of claim 6, further comprising: a thin-film transistor, wherein the thin-film transistor comprises a source electrode and a drain electrode, and the first electrode of the light-emitting device is electrically connected to at least one of the source electrode or the drain electrode.

8. The electronic apparatus of claim 6, further comprising a color filter, a quantum dot color conversion layer, a touch screen layer, a polarizing layer, or a combination thereof.

9. An organometallic compound represented by Formula 1: ##STR00153## wherein in Formula 1, M is a transition metal, CY.sub.2 to CY.sub.5 are each independently a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, Y.sub.2 to Y.sub.4 are each independently C or N, A.sub.1 to A.sub.4 are each independently a chemical bond, O, or S, T.sub.1 to T.sub.3 are each independently a single bond, a double bond, *—N[(L.sub.1).sub.b1-(R.sub.1a)]—*′, *—B(R.sub.1a)—*′, *—P(R.sub.1a)—*′, *—C(R.sub.1a)(R.sub.1b)—*′, *—Si(R.sub.1a)(R.sub.1b)—*′, *—Ge(R.sub.1a)(R.sub.1b)—*′, *—S—*′, *—Se—*′, *—O—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O).sub.2—*′, *—C(R.sub.1a)=*′, *═C(R.sub.1a)—*′, *—C(R.sub.1a)═C(R.sub.1b)—*′, *—C(═S)—*′, or *—C≡C—*′, a1 to a3 are each independently an integer from 1 to 3, Z.sub.1 is a single bond, *—N[(L.sub.2).sub.b2-(R.sub.2a)]—*′, *—B(R.sub.2a)—*′, *—P(R.sub.2a)—*′, *—C(R.sub.2a)(R.sub.2b)—*′, *—Si(R.sub.2a)(R.sub.2b)—*′, *—Ge(R.sub.2a)(R.sub.2b)—*′, *—S—*′, *—Se—*′, *—O—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O).sub.2—*′, *—C(R.sub.2a)=*′, *═C(R.sub.2a)—*′, *—C(R.sub.2a)═C(R.sub.2b)—*′, *—C(═S)—*′, or *—C≡C—*′, c1 is 0 or 1, * and *′ each indicate a binding site to a neighboring atom, L.sub.1 and L.sub.2 are each independently a single bond, a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, b1 and b2 are each independently an integer from 1 to 3, X.sub.11 is N or C(R.sub.11), X.sub.12 is N or C(R.sub.12), R.sub.11 to R.sub.13, R.sub.2 to R.sub.5, R.sub.1a, R.sub.1b, R.sub.2a, and R.sub.2b are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkenyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkynyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 alkoxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 aryloxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 arylthio group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.1)(Q.sub.2)(Q.sub.3), —N(Q.sub.1)(Q.sub.2), —B(Q.sub.1)(Q.sub.2), —C(═O)(Q.sub.1), —S(═O).sub.2(Q.sub.1), or —P(═O)(Q.sub.1)(Q.sub.2), d2 to d5 are each independently an integer from 0 to 10, NHet is a group comprising at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group, n1 is an integer from 1 to 3, two or more neighboring groups of R.sub.11 to R.sub.13, R.sub.2 to R.sub.5, R.sub.1a, R.sub.1b, R.sub.2a, and R.sub.2b are optionally bonded to each other to form a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.2-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, R.sub.10a is: deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group; a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, or a C.sub.1-C.sub.60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.11)(Q.sub.12)(Q.sub.13), —N(Q.sub.11)(Q.sub.12), —B(Q.sub.11)(Q.sub.12), —C(═O)(Q.sub.11), —S(═O).sub.2(Q.sub.11), —P(═O)(Q.sub.11)(Q.sub.12), or a combination thereof; a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, or a C.sub.6-C.sub.60 arylthio group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, a C.sub.1-C.sub.60 alkoxy group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.21)(Q.sub.22)(Q.sub.23), —N(Q.sub.21)(Q.sub.22), —B(Q.sub.21)(Q.sub.22), —C(—O)(Q.sub.21), —S(—O).sub.2(Q.sub.21), —P(═O)(Q.sub.21)(Q.sub.22), or a combination thereof; or —Si(Q.sub.31)(Q.sub.32)(Q.sub.33), —N(Q.sub.31)(Q.sub.32), —B(Q.sub.31)(Q.sub.32), —C(—O)(Q.sub.31), —S(—O).sub.2(Q.sub.31), or —P(═O)(Q.sub.31)(Q.sub.32), wherein Q.sub.1 to Q.sub.3, Q.sub.11 to Q.sub.13, Q.sub.21 to Q.sub.23, and Q.sub.31 to Q.sub.33 are each independently: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; a C.sub.1-C.sub.60 alkyl group; a C.sub.2-C.sub.60 alkenyl group; a C.sub.2-C.sub.60 alkynyl group; a C.sub.1-C.sub.60 alkoxy group; or a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C.sub.1-C.sub.60 alkyl group, a C.sub.1-C.sub.60 alkoxy group, a phenyl group, a biphenyl group, or a combination thereof.

10. The organometallic compound of claim 9, wherein CY.sub.2 is a group represented by one of Formulae CY2-1 to CY2-14, and CY.sub.4 is a group represented by one of Formulae CY4-1 to CY4-70: ##STR00154## ##STR00155## ##STR00156## ##STR00157## ##STR00158## ##STR00159## ##STR00160## ##STR00161## ##STR00162## ##STR00163## ##STR00164## ##STR00165## wherein in Formulae CY2-1 to CY2-14 and Formulae CY4-1 to CY4-70, X.sub.21 is C(R.sub.21) or N, X.sub.22 is C(R.sub.22) or N, X.sub.23 is C(R.sub.23) or N, X.sub.24 is C(R.sub.24) or N, X.sub.25 is C(R.sub.25) or N, X.sub.26 is C(R.sub.26) or N, X.sub.27 is C(R.sub.27) or N, X.sub.28 is C(R.sub.28a)(R.sub.28b), Si(R.sub.28a)(R.sub.28b), N(R.sub.28), O, or S, X.sub.40 is C(R.sub.40a) or N, X.sub.41 is C(R.sub.41) or N, X.sub.42 is C(R.sub.42) or N, X.sub.43 is C(R.sub.43) or N, X.sub.44 is C(R.sub.44) or N, X.sub.45 is C(R.sub.45) or N, X.sub.46 is C(R.sub.46) or N, X.sub.47 is C(R.sub.47) or N, X.sub.48 is C(R.sub.48) or N, X.sub.49 is C(R.sub.49a)(R.sub.49b), Si(R.sub.49a)(R.sub.49b), N(R.sub.49), O, or S, X.sub.50 is C(R.sub.50a)(R.sub.50b), Si(R.sub.50a)(R.sub.50b), N(R.sub.50), O, or S, R.sub.21 to R.sub.28, R.sub.21a, R.sub.22a, R.sub.24a to R.sub.28a, R.sub.21b, R.sub.22b, and R.sub.24b to R.sub.28b are each independently the same as defined in connection with R.sub.2 in Formula 1, R.sub.40 to R.sub.50, R.sub.40a, R.sub.42a, R.sub.43a, R.sub.45a to R.sub.50a, R.sub.42b, R.sub.43b, and R.sub.45b to R.sub.50b are each independently the same as defined in connection with R.sub.4 in Formula 1, b40 and b41 are each independently an integer from 1 to 4, * indicates a binding site to M, *′ in Formulae CY2-1 to CY2-14 indicates a binding site to T.sub.1, *″ indicates a binding site to T.sub.2, and *′ in Formulae CY4-1 to CY4-70 indicates a binding site to T.sub.3.

11. The organometallic compound of claim 9, wherein a group represented by ##STR00166## in Formula 1 is a group represented by Formula CY1-1 or CY1-2: ##STR00167## wherein in Formulae CY1-1 and CY1-2, R.sub.11 to R.sub.13 are each the same as defined in Formula 1, R.sub.14 to R.sub.17 are each independently the same as defined in connection with Ru in Formula 1, * indicates a binding site to M in Formula 1, and *′ indicates a binding site to T.sub.1 in Formula 1.

12. The organometallic compound of claim 9, wherein Y.sub.2 and Y.sub.3 are each C, and Y.sub.4 is N.

13. The organometallic compound of claim 9, wherein T.sub.2 is *—S—*′, *—Se—*′, or *—O—*′, and a2 is 1.

14. The organometallic compound of claim 9, wherein Z.sub.1 is a single bond, and c1 is 1.

15. The organometallic compound of claim 9, wherein NHet is a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzoxazole group, a benzoisoxazole group, a benzothiazole group, a benzoisothiazole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a phenanthroline group, a cinnoline group, a phthalazine group, a naphthyridine group, an imidazopyridine group, an imidazopyrimidine group, an imidazotriazine group, an imidazopyrazine group, an imidazopyridazine group, an azacarbazole group, an azafluorene group, an azadibenzosilole group, an azadibenzothiophene group, an azadibenzofuran group, or a combination thereof.

16. The organometallic compound of claim 9, wherein NHet is a group represented by Formula 2: ##STR00168## wherein in Formula 2, X.sub.61 is C(E.sub.61) or N, X.sub.62 is C(E.sub.62) or N, X.sub.63 is C(E.sub.63) or N, X.sub.64 is C(E.sub.64) or N, X.sub.65 is C(E.sub.66) or N, E.sub.61 is *-(L.sub.61).sub.b61-R.sub.61, E.sub.62 is *-(L.sub.62).sub.b62-R.sub.62, E.sub.63 is *-(L.sub.63).sub.b63-R.sub.63, E.sub.64 is *-(L.sub.64).sub.b64-R.sub.64, E.sub.65 is *-(L.sub.65).sub.b65-R.sub.65, at least one of X.sub.61 to X.sub.65 is N, L.sub.61 to L.sub.66 are each independently a single bond, a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, b61 to b66 are each independently an integer from 1 to 3, R.sub.61 to R.sub.65 are each independently hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkenyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkynyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 alkoxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 aryloxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 arylthio group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.1)(Q.sub.2)(Q.sub.3), —N(Q.sub.1)(Q.sub.2), —B(Q.sub.1)(Q.sub.2), —C(═O)(Q.sub.1), —S(═O).sub.2(Q.sub.1), or —P(═O)(Q.sub.1)(Q.sub.2), two or more neighboring groups of R.sub.61 to R.sub.65 are optionally bonded to each other to form a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.2-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, and * indicates a binding site to a neighboring atom, and Q.sub.1 to Q.sub.3 and R.sub.10a are the same as defined in Formula 1.

17. The organometallic compound of claim 16, wherein NHet is a group represented by Formula 2-1: ##STR00169## wherein in Formula 2-1, X.sub.61, X.sub.63, X.sub.65, L.sub.62, b62, L.sub.64, b64, R.sub.62, R.sub.64, L.sub.66, and b66 are each the same as defined in Formula 2, at least one of X.sub.61, X.sub.63, and X.sub.65 is N, and * indicates a binding site to a neighboring atom.

18. The organometallic compound of claim 9, wherein the organometallic compound represented by Formula 1 is represented by Formula 1-11 or Formula 1-12: ##STR00170## wherein in Formulae 1-11 and 1-12, M, X.sub.11, X.sub.12, CY.sub.2, CY.sub.4, CY.sub.5, T.sub.1 to T.sub.3, a1 to a3, A.sub.1 to A.sub.4, Y.sub.2 to Y.sub.4, Z.sub.1, c1, R.sub.2, R.sub.4, R.sub.5, d2, d4, d5, R.sub.13, and NHet are each the same as defined in Formula 1, X.sub.31 is C(R.sub.31) or N, X.sub.32 is C(R.sub.32) or N, and R.sub.31 and R.sub.32 are each independently the same as defined in connection with R.sub.3 in Formula 1.

19. The organometallic compound of claim 9, wherein the organometallic compound represented by Formula 1 is represented by Formula 1-2: ##STR00171## wherein in Formula 1-2, X.sub.21 is C(R.sub.21) or N, X.sub.22 is C(R.sub.22) or N, X.sub.23 is C(R.sub.23) or N, X.sub.31 is C(R.sub.31) or N, X.sub.41 is C(R.sub.41) or N, X.sub.42 is C(R.sub.42) or N, X.sub.43 is C(R.sub.43) or N, X.sub.44 is C(R.sub.44) or N, X.sub.51 is C(R.sub.51) or N, X.sub.52 is C(R.sub.52) or N, X.sub.53 is C(R.sub.53) or N, X.sub.54 is C(R.sub.54) or N, M, X.sub.11, X.sub.12, T.sub.1 to T.sub.3, a1 to a3, A.sub.1 to A.sub.4, Y.sub.2 to Y.sub.4, Z.sub.1, c1, R.sub.13, and NHet are each the same as defined in Formula 1, R.sub.21 to R.sub.23 are each independently the same as defined in connection with R.sub.2 in Formula 1, R.sub.31 is the same as defined in connection with R.sub.3 in Formula 1, R.sub.41 to R.sub.44 are each independently the same as defined in connection with R.sub.4 in Formula 1, and R.sub.51 to R.sub.54 are each independently the same as defined in connection with R.sub.5 in Formula 1.

20. The organometallic compound of claim 9, wherein the organometallic compound is one of Compounds 1 to 110: ##STR00172## ##STR00173## ##STR00174## ##STR00175## ##STR00176## ##STR00177## ##STR00178## ##STR00179## ##STR00180## ##STR00181## ##STR00182## ##STR00183## ##STR00184## ##STR00185## ##STR00186## ##STR00187## ##STR00188## ##STR00189## ##STR00190## ##STR00191## ##STR00192## ##STR00193## ##STR00194## ##STR00195## ##STR00196## ##STR00197## ##STR00198## ##STR00199## ##STR00200## ##STR00201## ##STR00202## ##STR00203## ##STR00204## ##STR00205## ##STR00206## ##STR00207## ##STR00208## ##STR00209## ##STR00210## ##STR00211## ##STR00212## ##STR00213## ##STR00214## ##STR00215## ##STR00216## ##STR00217## ##STR00218## ##STR00219##

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The above and other aspects and features of the disclosure will be more apparent by describing in detail embodiments thereof with reference to the accompanying drawings, in which:

[0054] FIG. 1 is a schematic cross-sectional view of a light-emitting device according to an embodiment;

[0055] FIG. 2 is a schematic cross-sectional view showing an electronic apparatus according to an embodiment; and

[0056] FIG. 3 is a schematic cross-sectional view showing an electronic apparatus according to another embodiment.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0057] The disclosure will now be described more fully hereinafter with reference to the accompanying drawings, in which embodiments are shown. This disclosure may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0058] In the drawings, the sizes, thicknesses, ratios, and dimensions of the elements may be exaggerated for ease of description and for clarity. Like numbers refer to like elements throughout.

[0059] In the description, it will be understood that when an element (or region, layer, part, etc.) is referred to as being “on”, “connected to”, or “coupled to” another element, it can be directly on, connected to, or coupled to the other element, or one or more intervening elements may be present therebetween. In a similar sense, when an element (or region, layer, part, etc.) is described as “covering” another element, it can directly cover the other element, or one or more intervening elements may be present therebetween.

[0060] In the description, when an element is “directly on,” “directly connected to,” or “directly coupled to” another element, there are no intervening elements present. For example, “directly on” may mean that two layers or two elements are disposed without an additional element such as an adhesion element therebetween.

[0061] As used herein, the expressions used in the singular such as “a,” “an,” and “the,” are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0062] As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. For example, “A and/or B” may be understood to mean “A, B, or A and B.” The terms “and” and “or” may be used in the conjunctive or disjunctive sense and may be understood to be equivalent to “and/or”.

[0063] In the specification and the claims, the term “at least one of” is intended to include the meaning of “at least one selected from the group of” for the purpose of its meaning and interpretation. For example, “at least one of A and B” may be understood to mean “A, B, or A and B.” When preceding a list of elements, the term, “at least one of,” modifies the entire list of elements and does not modify the individual elements of the list.

[0064] It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. Thus, a first element could be termed a second element without departing from the teachings of the disclosure. Similarly, a second element could be termed a first element, without departing from the scope of the disclosure.

[0065] The spatially relative terms “below”, “beneath”, “lower”, “above”, “upper”, or the like, may be used herein for ease of description to describe the relations between one element or component and another element or component as illustrated in the drawings. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the drawings. For example, in the case where a device illustrated in the drawing is turned over, the device positioned “below” or “beneath” another device may be placed “above” another device. Accordingly, the illustrative term “below” may include both the lower and upper positions. The device may also be oriented in other directions and thus the spatially relative terms may be interpreted differently depending on the orientations.

[0066] The terms “about” or “approximately” as used herein is inclusive of the stated value and means within an acceptable range of deviation for the recited value as determined by one of ordinary skill in the art, considering the measurement in question and the error associated with measurement of the recited quantity (i.e., the limitations of the measurement system). For example, “about” may mean within one or more standard deviations, or within ±20%, ±10%, or ±5% of the stated value.

[0067] It should be understood that the terms “comprises,” “comprising,” “includes,” “including,” “have,” “having,” “contains,” “containing,” and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof in the disclosure, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

[0068] Unless otherwise defined or implied herein, all terms (including technical and scientific terms) used have the same meaning as commonly understood by those skilled in the art to which this disclosure pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and should not be interpreted in an ideal or excessively formal sense unless clearly defined in the specification.

[0069] In an embodiment, the organometallic compound may be represented by Formula 1:

##STR00004##

[0070] In Formula 1, M may be a transition metal.

[0071] In an embodiment, M may be platinum (Pt), palladium (Pd), copper (Cu), silver (Ag), gold (Au), rhodium (Rh), iridium (Ir), ruthenium (Ru), or osmium (Os).

[0072] In Formula 1, CY.sub.2 to CY.sub.5 may each independently be a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group.

[0073] In an embodiment, CY.sub.2 to CY.sub.5 may each independently a benzene group, a naphthalene group, an anthracene group, a phenanthrene group, a triphenylene group, a pyrene group, a chrysene group, a cyclopentadiene group, a 1,2,3,4-tetrahydronaphthalene group, a thiophene group, a furan group, an indole group, a benzoborole group, a benzophosphole group, an indene group, a benzosilole group, a benzogermole group, a benzothiophene group, a benzoselenophene group, a benzofuran group, a carbazole group, a dibenzoborole group, a dibenzophosphole group, a fluorene group, a dibenzosilole group, a dibenzogermole group, a dibenzothiophene group, a dibenzoselenophene group, a dibenzofuran group, a dibenzothiophene 5-oxide group, 9H-fluorene-9-one group, a dibenzothiophene 5,5-dioxide group, an azaindole group, an azabenzoborole group, an azabenzophosphole group, an azaindene group, an azabenzosilole group, an azabenzogermole group, an azabenzothiophene group, an azabenzoselenophene group, an azabenzofuran group, an azacarbazole group, an azadibenzoborole group, an azadibenzophosphole group, an azafluorene group, an azadibenzosilole group, an azadibenzogermole group, an azadibenzothiophene group, an azadibenzoselenophene group, an azadibenzofuran group, an azadibenzothiophene 5-oxide group, an aza-9H-fluorene-9-one group, an azadibenzothiophene 5,5-dioxide group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a quinoxaline group, a quinazoline group, a phenanthroline group, a pyrrole group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isooxazole group, a thiazole group, an isothiazole group, an oxadiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzotriazole group, a benzoxazole group, a benzothiazole group, a benzoxadiazole group, a benzothiadiazole group, a 5,6,7,8-tetrahydroisoquinoline group, or a 5,6,7,8-tetrahydroquinoline group.

[0074] In an embodiment, CY.sub.2 may be a group represented by one of Formulae CY2-1 to CY2-14, and CY.sub.4 may be a group represented by one of Formulae CY4-1 to CY4-70:

##STR00005## ##STR00006## ##STR00007## ##STR00008## ##STR00009## ##STR00010## ##STR00011## ##STR00012## ##STR00013## ##STR00014## ##STR00015## ##STR00016##

[0075] In Formulae CY2-1 to CY2-14 and Formulae CY4-1 to CY4-70,

[0076] X.sub.21 may be C(R.sub.21) or N, X.sub.22 may be C(R.sub.22) or N, X.sub.23 may be C(R.sub.23) or N, X.sub.24 may be C(R.sub.24) or N, X.sub.25 may be C(R.sub.25) or N, X.sub.26 may be C(R.sub.26) or N, and X.sub.27 may be C(R.sub.27) or N,

[0077] X.sub.28 may be C(R.sub.28a)(R.sub.28b), Si(R.sub.28a)(R.sub.28b), N(R.sub.28), O, or S,

[0078] X.sub.40 may be C(R.sub.40a) or N, X.sub.41 may be C(R.sub.41) or N, X.sub.42 may be C(R.sub.42) or N, X.sub.43 may be C(R.sub.43) or N, X.sub.44 may be C(R.sub.44) or N, X.sub.45 may be C(R.sub.45) or N, X.sub.46 may be C(R.sub.46) or N, X.sub.47 may be C(R.sub.47) or N, and X.sub.48 may be C(R.sub.48) or N,

[0079] X.sub.49 may be C(R.sub.49a)(R.sub.49b), Si(R.sub.49a)(R.sub.49b), N(R.sub.49), O, or S,

[0080] X.sub.50 may be C(R.sub.50a)(R.sub.50b), Si(R.sub.50a)(R.sub.50b), N(R.sub.50), O, or S,

[0081] R.sub.21 to R.sub.28, R.sub.21a, R.sub.22a, R.sub.24a to R.sub.28a, R.sub.21b, R.sub.22b, and R.sub.24b to R.sub.28b may each independently be the same as defined in connection with R.sub.2 in Formula 1,

[0082] R.sub.40 to R.sub.50, R.sub.40a, R.sub.42a, R.sub.43a, R.sub.45a to R.sub.50a, R.sub.42b, R.sub.43b, and R.sub.45b to R.sub.50b may each independently be the same as defined in connection with R.sub.4 in Formula 1,

[0083] b40 and b41 may each independently be an integer from 1 to 4,

[0084] * indicates a binding site to M,

[0085] *′ in Formulae CY2-1 to CY2-14 indicates a binding site to T.sub.1, *″ indicates a binding site to T.sub.2, and *′ in Formulae CY4-1 to CY4-70 indicates a binding site to T.sub.3.

##STR00017##

[0086] In an embodiment, a group represented by in Formula 1 may be a group represented by Formula CY1-1 or CY1-2:

##STR00018##

[0087] In Formulae CY1-1 and CY1-2,

[0088] R.sub.11 to R.sub.13 are each the same as defined in Formula 1,

[0089] R.sub.14 to R.sub.17 may each independently be the same as defined in connection with R.sub.11 in Formula 1,

[0090] * indicates a binding site to M of Formula 1, and

[0091] *′ indicates a binding site to T.sub.1 of Formula 1.

[0092] In Formula 1, Y.sub.2 to Y.sub.4 may each independently be C or N.

[0093] In an embodiment, Y.sub.2 and Y.sub.3 may each be C, and Y.sub.4 may be N.

[0094] In Formula 1, A.sub.1 to A.sub.4 may each independently be a chemical bond, O, or S.

[0095] In Formula 1, T.sub.1 to T.sub.3 may each independently be a single bond, a double bond, *—N[(L.sub.1).sub.b1-(R.sub.1a)]—*′, *—B(R.sub.1a)—*′, *—P(R.sub.1a)—*′, *—C(R.sub.1a)(R.sub.1b)—*′, *—Si(R.sub.1a)(R.sub.1b)—*′, *—Ge(R.sub.1a)(R.sub.1b)—*′, *—S—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O).sub.2—*′, *—C(R.sub.1a)═*′, *═C(R.sub.1a)—*′, *—C(R.sub.1a)═C(R.sub.1b)—*′, *—C(═S)—*′, or *—C≡C—*′.

[0096] In Formula 1, a1 to a3 may each independently be an integer from 1 to 3.

[0097] In an embodiment, T.sub.2 may be *—S—*′, *—Se—*′, or *—O—*′, and a2 may be 1.

[0098] In Formula 1, Z.sub.1 may be a single bond, *—N[(L.sub.2).sub.b2-(R.sub.2a)]—*′, *—B(R.sub.2a)—*′, *—P(R.sub.2a)—*′, *—C(R.sub.2a)(R.sub.2b)—*′, *—Si(R.sub.2a)(R.sub.2b)—*′, *—Ge(R.sub.2a)(R.sub.2b)—*′, *—Se—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O).sub.2—*′, *—C(R.sub.2a)═*′, *═C(R.sub.2a)—*′, *—C(R.sub.2a)═C(R.sub.2b)—*′, *—C(═S)—*′ or *—C≡C—*′.

[0099] In Formula 1, c1 may be 0 or 1.

[0100] In an embodiment, Z.sub.1 may be a single bond, and c1 may be 1.

[0101] In Formula 1, * and *′ each indicate a binding site to a neighboring atom, and

[0102] L.sub.1 and L.sub.2 may each independently be a single bond, a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a.

[0103] In Formula 1, b1 and b2 may each independently be an integer from 1 to 3.

[0104] In Formula 1, X.sub.11 may be N or C(R.sub.11), and X.sub.12 may be N or C(R.sub.12).

[0105] In Formula 1, R.sub.11 to R.sub.13, R.sub.2 to R.sub.5, R.sub.1a, R.sub.1b, R.sub.2a, and R.sub.2b may each independently be hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkenyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkynyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 alkoxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 aryloxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 arylthio group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.1)(Q.sub.2)(Q.sub.3), —N(Q.sub.1)(Q.sub.2), —B(Q.sub.1)(Q.sub.2), —C(═O)(Q.sub.1), —S(═O).sub.2(Q.sub.1), or —P(═O)(Q.sub.1)(Q.sub.2).

[0106] In Formula 1, d2 to d5 may each independently be an integer from 0 to 10.

[0107] In Formula 1, NHet may be a group including at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group. For example, NHet may be a group comprising at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group that is unsubstituted or substituted with at least one R.sub.10a, and R.sub.10a is the same as described herein.

[0108] In Formula 1, n1 may be an integer from 1 to 3.

[0109] In an embodiment, NHet may be a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzoxazole group, a benzoisoxazole group, a benzothiazole group, a benzoisothiazole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a phenanthroline group, a cinnoline group, a phthalazine group, a naphthyridine group, an imidazopyridine group, an imidazopyrimidine group, an imidazotriazine group, an imidazopyrazine group, an imidazopyridazine group, an azacarbazole group, an azafluorene group, an azadibenzosilole group, an azadibenzothiophene group, an azadibenzofuran group, or any combination thereof.

[0110] In an embodiment, NHet may be a group represented by Formula 2:

##STR00019##

[0111] In Formula 2,

[0112] X.sub.61 may be C(E.sub.61) or N,

[0113] X.sub.62 may be C(E.sub.62) or N,

[0114] X.sub.63 may be C(E.sub.63) or N,

[0115] X.sub.64 may be C(E.sub.64) or N,

[0116] X.sub.65 may be C(E.sub.65) or N,

[0117] E.sub.61 may be *-(L.sub.61).sub.b61-R.sub.61,

[0118] E.sub.62 may be *-(L.sub.62).sub.b62-R.sub.62,

[0119] E.sub.63 may be *-(L.sub.63).sub.b63-R.sub.63,

[0120] E.sub.64 may be *-(L.sub.46).sub.b64-R.sub.64,

[0121] E.sub.66 may be *-(L.sub.65).sub.b65-R.sub.65,

[0122] at least one of X.sub.61 to X.sub.65 may be N,

[0123] L.sub.61 to L.sub.66 may each independently be a single bond, a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0124] b61 to b66 may each independently be an integer from 1 to 3,

[0125] R.sub.61 to R.sub.65 may each independently be hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkenyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkynyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 alkoxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 aryloxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.6-C.sub.60 arylthio group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.1)(Q.sub.2)(Q.sub.3), —N(Q.sub.1)(Q.sub.2), —B(Q.sub.1)(Q.sub.2), —C(═O)(Q.sub.1), —S(═O).sub.2(Q.sub.1), or —P(═O)(Q.sub.1)(Q.sub.2),

[0126] two or more neighboring groups of R.sub.61 to R.sub.65 may optionally be bonded to each other to form a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.2-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, * indicates a binding site to a neighboring atom, and Q.sub.1 to Q.sub.3 and R.sub.10a are the same as described herein.

[0127] In an embodiment, NHet may be a group represented by Formula 2-1:

##STR00020##

[0128] In Formula 2-1,

[0129] X.sub.61, X.sub.63, X.sub.65, L.sub.62, b62, L.sub.64, b.sub.64, R.sub.62, R.sub.64, L.sub.66, and b66 are each the same as defined in Formula 2,

[0130] at least one of X.sub.61, X.sub.63, and X.sub.65 may be N, and

[0131] * indicates a binding site to a neighboring atom.

[0132] In Formula 1, two or more neighboring groups of R.sub.11 to R.sub.13, R.sub.2 to R.sub.5, R.sub.1a, R.sub.1b, R.sub.2a, and R.sub.2b may optionally be bonded to each other to form a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.2-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a.

[0133] For example, X.sub.11 may be C(R.sub.11), X.sub.12 may be C(R.sub.12), and R.sub.11 and R.sub.12 may be bonded to each other to form a C.sub.5-C.sub.30 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.2-C.sub.30 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a.

[0134] In an embodiment, in the organometallic compound represented by Formula 1, at least one hydrogen atom may be substituted with a deuterium atom.

[0135] R.sub.10a may be:

[0136] deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;

[0137] a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, or a C.sub.1-C.sub.60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.11)(Q.sub.12)(Q.sub.13), —N(Q.sub.11)(Q.sub.12), —B(Q.sub.11)(Q.sub.12), —C(═O)(Q.sub.11), —S(═O).sub.2(Q.sub.11), —P(═O)(Q.sub.11)(Q.sub.12), or any combination thereof;

[0138] a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, or a C.sub.6-C.sub.60 arylthio group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, a C.sub.1-C.sub.60 alkoxy group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.21)(Q.sub.22)(Q.sub.23), —N(Q.sub.21)(Q.sub.22), —B(Q.sub.21)(Q.sub.22), —C(—O)(Q.sub.21), —S(—O).sub.2(Q.sub.21), —P(═O)(Q.sub.21)(Q.sub.22), or any combination thereof; or

[0139] —Si(Q.sub.31)(Q.sub.32)(Q.sub.33), —N(Q.sub.31)(Q.sub.32), —B(Q.sub.31)(Q.sub.32), —C(—O)(Q.sub.31), —S(—O).sub.2(Q.sub.31), or —P(═O)(Q.sub.31)(Q.sub.32).

[0140] Q.sub.1 to Q.sub.3, Q.sub.11 to Q.sub.13, Q.sub.21 to Q.sub.23, and Q.sub.31 to Q.sub.33 may each independently be: hydrogen; deuterium; —F; —Br; —I; a hydroxyl group; a cyano group; a nitro group; C.sub.1-C.sub.60 alkyl group; C.sub.2-C.sub.60 alkenyl group; C.sub.2-C.sub.60 alkynyl group; C.sub.1-C.sub.60 alkoxy group; or a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C.sub.1-C.sub.60 alkyl group, a C.sub.1-C.sub.60 alkoxy group, a phenyl group, a biphenyl group, or any combination thereof.

[0141] In an embodiment, the organometallic compound represented by Formula 1 may be represented by Formula 1-11 or Formula 1-12:

##STR00021##

[0142] In Formulae 1-11 and 1-12,

[0143] M, X.sub.11, X.sub.12, CY.sub.2, CY.sub.4, CY.sub.5, T.sub.1 to T.sub.3, a1 to a3, A.sub.1 to A.sub.4, Y.sub.2 to Y.sub.4, Z.sub.1, c1, R.sub.2, R.sub.4, R.sub.5, d2, d4, d5, R.sub.13, and NHet are each the same as defined in Formula 1,

[0144] X.sub.31 may be C(R.sub.31) or N,

[0145] X.sub.32 may be C(R.sub.32) or N, and

[0146] R.sub.31 and R.sub.32 may each independently be the same as defined in connection with R.sub.3 in Formula 1.

[0147] In an embodiment, the organometallic compound represented by Formula 1 may be represented by Formula 1-2:

##STR00022##

[0148] In Formula 1-2,

[0149] X.sub.21 may be C(R.sub.21) or N, X.sub.22 may be C(R.sub.22) or N, and X.sub.23 may be C(R.sub.23) or N,

[0150] X.sub.31 may be C(R.sub.31) or N,

[0151] X.sub.41 may be C(R.sub.41) or N, X.sub.42 may be C(R.sub.42) or N, X.sub.43 may be C(R.sub.43) or N, and X.sub.44 may be C(R.sub.44) or N,

[0152] X.sub.51 may be C(R.sub.51) or N, X.sub.52 may be C(R.sub.52) or N, X.sub.53 may be C(R.sub.53) or N, and X.sub.54 may be C(R.sub.54) or N,

[0153] M, X.sub.11, X.sub.12, T.sub.1 to T.sub.3, a1 to a3, A.sub.1 to A.sub.4, Y.sub.2 to Y.sub.4, Z.sub.1, c1, R.sub.13, and NHet are each the same as defined in Formula 1,

[0154] R.sub.21 to R.sub.23 may each independently be the same as defined in connection with R.sub.2 in Formula 1,

[0155] R.sub.31 may be the same as defined in connection with R.sub.3 in Formula 1,

[0156] R.sub.41 to R.sub.44 may each independently be the same as defined in connection with R.sub.4 in Formula 1, and

[0157] R.sub.51 to R.sub.54 may each independently be the same as defined in connection with R.sub.5 in Formula 1.

[0158] In an embodiment, the organometallic compound represented by Formula 1 may be represented by Formula 1-3:

##STR00023##

[0159] In Formula 1-3,

[0160] M, X.sub.11, X.sub.12, T.sub.1 to T.sub.3, a1 to a3, A.sub.1 to A.sub.4, Y.sub.2 to Y.sub.4, R.sub.13, NHet, R.sub.22, R.sub.43, and R.sub.53 may each be the same as defined in Formula 1-2.

[0161] In an embodiment, the organometallic compound represented by Formula 1 may be represented by Formula 1-3(1) or Formula 1-3(2):

##STR00024##

[0162] In Formulae 1-3(1) and 1-3(2),

[0163] R.sub.11 to R.sub.17, M, T.sub.1 to T.sub.3, a1 to a3, A.sub.1 to A.sub.4, Y.sub.2 to Y.sub.4, R.sub.11 to R.sub.17, NHet, R.sub.22, R.sub.43, and R.sub.53 may each be the same as defined in Formulae 1, CY1-1, and CY1-2.

[0164] In an embodiment, the organometallic compound represented by Formula 1 may be one of Compounds 1 to 110, but is not limited thereto:

##STR00025## ##STR00026## ##STR00027## ##STR00028## ##STR00029## ##STR00030## ##STR00031## ##STR00032## ##STR00033## ##STR00034## ##STR00035## ##STR00036## ##STR00037## ##STR00038## ##STR00039## ##STR00040## ##STR00041## ##STR00042## ##STR00043## ##STR00044## ##STR00045## ##STR00046## ##STR00047## ##STR00048## ##STR00049## ##STR00050## ##STR00051## ##STR00052## ##STR00053## ##STR00054## ##STR00055## ##STR00056## ##STR00057## ##STR00058## ##STR00059## ##STR00060## ##STR00061## ##STR00062## ##STR00063## ##STR00064## ##STR00065## ##STR00066## ##STR00067##

[0165] The organometallic compound represented by Formula 1 may have a structure in which a group including at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group (a group represented by NHet in Formula 1) is substituted into ring CY.sub.3. Because at least one NHet group is substituted into ring CY.sub.3, a highest occupied molecular orbital (HOMO) energy level of the organometallic compound may become relatively low, thereby causing an emission wavelength of the organometallic compound to shift to a shorter wavelength and thus allow the organometallic compound to emit blue light with high color purity.

[0166] Because a dipole moment of the organometallic compound is stabilized, the stability of the compound may be increased. Therefore, the light-emitting device including the organometallic compound may have improved luminescence efficiency and lifespan.

[0167] Therefore, an electronic device including the organometallic compound represented by Formula 1, for example, a light-emitting device, may have low driving voltage and high efficiency, and may emit deep-blue light, thereby having high color purity.

[0168] Synthesis methods of the organometallic compound represented by Formula 1 may be recognizable by one of ordinary skill in the art by referring to Synthesis Examples and/or Examples provided below.

[0169] At least one organometallic compound represented by Formula 1 may be included in a light-emitting device (for example, an organic light-emitting device). Accordingly, provided is a light-emitting device which may include a first electrode, a second electrode facing the first electrode, an interlayer between the first electrode and the second electrode and including an emission layer, and at least one organometallic compound represented by Formula 1.

[0170] In an embodiment, the first electrode of the light-emitting device may be an anode; the second electrode of the light-emitting device may be a cathode; the interlayer may include a hole transport region between the first electrode and the emission layer, and an electron transport region located between the emission layer and the second electrode; the hole transport region may include a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or any combination thereof; and the electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0171] In an embodiment, the organometallic compound may be included between a pair of electrodes of the light-emitting device. Accordingly, the organometallic compound may be included in the interlayer of the light-emitting device, for example, in the emission layer of the interlayer.

[0172] In an embodiment, the emission layer may further include a host, and an amount of the organometallic compound may be in a range of about 0.01 parts by weight to about 49.99 parts by weight, based on 100 parts by weight of the emission layer.

[0173] In an embodiment, the emission layer may emit blue light or blue-green light.

[0174] In an embodiment, the emission layer may emit light having a maximum emission wavelength in a range of about 400 nm to about 500 nm.

[0175] The expression “(an interlayer) includes an organometallic compounds” as used herein may include a case in which “(an interlayer) includes identical organometallic compounds represented by Formula 1” and a case in which “(an interlayer) includes two or more different organometallic compounds represented by Formula 1.”

[0176] In an embodiment, the interlayer may include, as the organometallic compound, only Compound 1. In this regard, Compound 1 may be present in the emission layer of the light-emitting device. In another embodiment, the interlayer may include, as the organometallic compound, Compound 1 and Compound 2. In this regard, Compound 1 and Compound 2 may be present in a same layer (for example, all of Compound 1 and Compound 2 may be present in the emission layer), or may be present in different layers (for example, Compound 1 may be present in the emission layer, and Compound 2 may be present in the electron transport region).

[0177] The term “interlayer” as used herein refers to a single layer and/or multiple layers located between the first electrode and the second electrode of the light-emitting device.

[0178] Another aspect provides an electronic apparatus which may include the light-emitting device. The electronic apparatus may further include a thin-film transistor. For example, in an embodiment, the electronic apparatus may further include a thin-film transistor including a source electrode and a drain electrode, wherein the first electrode of the light-emitting device may be electrically connected to the source electrode or the drain electrode. In an embodiment, the electronic apparatus may further include a color filter, a color conversion layer, a touch screen layer, a polarizing layer, or any combination thereof. Further details on the electronic apparatus may be found by referring to related descriptions provided herein.

[0179] [Description of FIG. 1]

[0180] FIG. 1 is a schematic cross-sectional view of a light-emitting device 10 according to an embodiment. The light-emitting device 10 includes a first electrode 110, an interlayer 130, and a second electrode 150.

[0181] Hereinafter, the structure of the light-emitting device 10 according to an embodiment and a method of manufacturing the light-emitting device 10 will be described with reference to FIG. 1.

[0182] [First Electrode 110]

[0183] In FIG. 1, a substrate may be further included under the first electrode 110 or on the second electrode 150. The substrate may be a glass substrate or a plastic substrate, but is not limited thereto. In embodiments, the substrate may be a flexible substrate, and may include plastics with excellent heat resistance and durability, such as polyimide, polyethylene terephthalate (PET), polycarbonate, polyethylene naphthalate, polyarylate (PAR), polyetherimide, or any combination thereof.

[0184] The first electrode 110 may be formed by, for example, depositing or sputtering a material for forming the first electrode 110 on the substrate. When the first electrode 110 is an anode, a material for forming the first electrode 110 may be a high-work function material that facilitates injection of holes.

[0185] The first electrode 110 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. When the first electrode 110 is a transmissive electrode, a material for forming the first electrode 110 may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO.sub.2), zinc oxide (ZnO), or any combination thereof. In embodiments, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, a material for forming the first electrode 110 may include magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), or any combination thereof.

[0186] The first electrode 110 may have a structure consisting of a single layer or a structure including multiple layers. For example, the first electrode 110 may have a three-layered structure of ITO/Ag/ITO.

[0187] [Interlayer 130]

[0188] The interlayer 130 may be located on the first electrode 110. The interlayer 130 may include an emission layer.

[0189] The interlayer 130 may further include a hole transport region located between the first electrode 110 and the emission layer, and an electron transport region located between the emission layer and the second electrode 150.

[0190] The interlayer 130 may further include, in addition to various organic materials, a metal-containing compound such as an organometallic compound, an inorganic material such as quantum dots, or the like.

[0191] In embodiments, the interlayer 130 may include two or more emitting units stacked between the first electrode 110 and the second electrode 150, and at least one charge generation layer located between the two or more emitting units. When the interlayer 130 includes the two or more emitting units and the at least one charge generation layer as described above, the light-emitting device 10 may be a tandem light-emitting device.

[0192] [Hole Transport Region in Interlayer 130]

[0193] The hole transport region may have a structure consisting of a layer consisting of a single material, a structure consisting of a layer consisting of different materials, or a structure including multiple layers including different materials.

[0194] The hole transport region may include a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or any combination thereof.

[0195] For example, the hole transport region may have a multi-layered structure including a hole injection layer/hole transport layer structure, a hole injection layer/hole transport layer/emission auxiliary layer structure, a hole injection layer/emission auxiliary layer structure, a hole transport layer/emission auxiliary layer structure, or a hole injection layer/hole transport layer/electron blocking layer structure, wherein the layers of each structure may be stacked from the first electrode 110 in its respective stated order, but the structure of the hole transport region is not limited thereto.

[0196] The hole transport region may include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof:

##STR00068##

[0197] In Formulae 201 and 202,

[0198] L.sub.201 to L.sub.204 may each independently be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0199] L.sub.205 may be *—O—*′, *—S—*′, *—N(Q.sub.201)-*′, a C.sub.1-C.sub.20 alkylene group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.20 alkenylene group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0200] xa1 to xa4 may each independently be an integer from 0 to 5,

[0201] xa5 may be an integer from 1 to 10,

[0202] R.sub.201 to R.sub.204 and Q.sub.201 may each independently be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0203] R.sub.201 and R.sub.202 may optionally be bonded to each other via a single bond, a C.sub.1-C.sub.5 alkylene group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.2-C.sub.5 alkenylene group that is unsubstituted or substituted with at least one R.sub.10a, to form a C.sub.8-C.sub.60 polycyclic group (for example, a carbazole group or the like) unsubstituted or substituted with at least one R.sub.10a (for example, Compound HT16),

[0204] R.sub.203 and R.sub.204 may optionally be bonded to each other, via a single bond, a C.sub.1-C.sub.5 alkylene group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.2-C.sub.5 alkenylene group that is unsubstituted or substituted with at least one R.sub.10a to form a C.sub.8-C.sub.60 polycyclic group that is unsubstituted or substituted with at least one R.sub.10a, and

[0205] na1 may be an integer from 1 to 4.

[0206] For example, each of Formulae 201 and 202 may include at least one of groups represented by Formulae CY201 to CY217:

##STR00069## ##STR00070## ##STR00071##

[0207] In Formulae CY201 to CY217, R.sub.10b and R.sub.10c are each independently the same as described in connection with R.sub.10a, ring CY.sub.201 to ring CY.sub.204 may each independently be a C.sub.3-C.sub.20 carbocyclic group or a C.sub.1-C.sub.20 heterocyclic group, and at least one hydrogen in Formulae CY201 to CY217 may be unsubstituted or substituted with R.sub.10a.

[0208] In embodiments, in Formulae CY201 to CY217, ring CY.sub.201 to ring CY.sub.204 may each independently be a benzene group, a naphthalene group, a phenanthrene group, or an anthracene group.

[0209] In embodiments, each of Formulae 201 and 202 may include at least one of groups represented by Formulae CY201 to CY203.

[0210] In embodiments, Formula 201 may include at least one of the groups represented by Formulae CY201 to CY203 and at least one of the groups represented by Formulae CY204 to CY217.

[0211] In embodiments, in Formula 201, xa1 may be 1, R.sub.201 may be a group represented by one of Formulae CY201 to CY203, xa2 may be 0, and R.sub.202 may be a group represented by one of Formulae CY204 to CY207.

[0212] In embodiments, each of Formulae 201 and 202 may not include a group represented by one of Formulae CY201 to CY203.

[0213] In embodiments, each of Formulae 201 and 202 may not include a group represented by one of Formulae CY201 to CY203, and may include at least one of the groups represented by Formulae CY204 to CY217.

[0214] In embodiments, each of Formulae 201 and 202 may not include a group represented by one of Formulae CY201 to CY217.

[0215] In an embodiment, the hole transport region may include one of Compounds HT1 to HT44, m-MTDATA, TDATA, 2-TNATA, NPB(NPD), β-NPB, TPD, Spiro-TPD, Spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline/dodecylbenzenesulfonic acid (PANI/DBSA), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), polyaniline/camphor sulfonic acid (PANI/CSA), polyaniline/poly(4-styrenesulfonate) (PANI/PSS), or any combination thereof:

##STR00072## ##STR00073## ##STR00074## ##STR00075## ##STR00076## ##STR00077## ##STR00078## ##STR00079## ##STR00080## ##STR00081## ##STR00082##

[0216] A thickness of the hole transport region may be in a range of about 50 Å to about 10,000 Å. For example, the thickness of the hole transport region may be in a range of about 100 Å to about 4,000 Å. When the hole transport region includes a hole injection layer, a hole transport layer, or any combination thereof, a thickness of the hole injection layer may be in a range of about 100 Å to about 9,000 Å, and a thickness of the hole transport layer may be in a range of about 50 Å to about 2,000 Å. For example, the thickness of the hole injection layer may be in a range of about 100 Å to about 1,000 Å. For example, the thickness of the hole transport layer may be in a range of about 100 Å to about 1,500 Å. When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within these ranges, satisfactory hole transporting characteristics may be obtained without a substantial increase in driving voltage.

[0217] The emission auxiliary layer may increase light-emission efficiency by compensating for an optical resonance distance according to a wavelength of light emitted by an emission layer, and the electron blocking layer may block the flow of electrons from an electron transport region. The emission auxiliary layer and the electron blocking layer may include the materials as described above.

[0218] [p-Dopant]

[0219] The hole transport region may further include, in addition to these materials, a charge-generation material for the improvement of conductive properties. The charge-generation material may be uniformly or non-uniformly dispersed in the hole transport region (for example, in the form of a single layer consisting of a charge-generation material).

[0220] The charge-generation material may be, for example, a p-dopant.

[0221] For example, a lowest unoccupied molecular orbital (LUMO) energy level of the p-dopant may be equal to or less than about −3.5 eV.

[0222] In embodiments, the p-dopant may include a quinone derivative, a cyano group-containing compound, a compound including element EL1 and element EL2, or any combination thereof.

[0223] Examples of the quinone derivative may include TCNQ, F4-TCNQ, etc.

[0224] Examples of the cyano group-containing compound may include HAT-CN, and a compound represented by Formula 221:

##STR00083##

[0225] In Formula 221,

[0226] R.sub.221 to R.sub.223 may each independently be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, and

[0227] at least one of R.sub.221 to R.sub.223 may each independently be a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, each substituted with a cyano group; —F; —Cl; —Br; —I; a C.sub.1-C.sub.20 alkyl group substituted with a cyano group, —F, —Cl, —Br, —I, or any combination thereof; or any combination thereof.

[0228] In the compound including element EL1 and element EL2, element EL1 may be a metal, a metalloid, or any combination thereof, and element EL2 may be a non-metal, a metalloid, or any combination thereof.

[0229] Examples of the metal may include: an alkali metal (for example, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), etc.); alkaline earth metal (for example, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), etc.); a transition metal (for example, titanium (Ti), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (Cr), molybdenum (Mo), tungsten (W), manganese (Mn), technetium (Tc), rhenium (Re), iron (Fe), ruthenium (Ru), osmium (Os), cobalt (Co), rhodium (Rh), iridium (Ir), nickel (Ni), palladium (Pd), platinum (Pt), copper (Cu), silver (Ag), gold (Au), etc.); a post-transition metal (for example, zinc (Zn), indium (In), tin (Sn), etc.); and a lanthanide metal (for example, lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), etc.).

[0230] Examples of the metalloid may include silicon (Si), antimony (Sb), and tellurium (Te).

[0231] Examples of the non-metal may include oxygen (O) and a halogen (for example, F, Cl, Br, I, etc.).

[0232] Examples of the compound including element EL1 and element EL2 may include a metal oxide, a metal halide (for example, a metal fluoride, a metal chloride, a metal bromide, or a metal iodide), a metalloid halide (for example, a metalloid fluoride, a metalloid chloride, a metalloid bromide, or a metalloid iodide), a metal telluride, or any combination thereof.

[0233] Examples of the metal oxide may include tungsten oxide (for example, WO, W.sub.2O.sub.3, WO.sub.2, WO.sub.3, W.sub.2O.sub.5, etc.), vanadium oxide (for example, VO, V.sub.2O.sub.3, VO.sub.2, V.sub.2O.sub.5, etc.), molybdenum oxide (MoO, Mo.sub.2O.sub.3, MoO.sub.2, MoO.sub.3, Mo.sub.2O.sub.5, etc.), and rhenium oxide (for example, ReO.sub.3, etc.).

[0234] Examples of the metal halide may include an alkali metal halide, an alkaline earth metal halide, a transition metal halide, a post-transition metal halide, and a lanthanide metal halide.

[0235] Examples of the alkali metal halide may include LiF, NaF, KF, RbF, CsF, LiCl, NaCl, KCl, RbCl, CsCl, LiBr, NaBr, KBr, RbBr, CsBr, LiI, NaI, KI, RbI, and CsI.

[0236] Examples of the alkaline earth metal halide may include BeF.sub.2, MgF.sub.2, CaF.sub.2, SrF.sub.2, BaF.sub.2, BeCl.sub.2, MgCl.sub.2, CaCl.sub.2), SrCl.sub.2, BaCl.sub.2, BeBr.sub.2, MgBr.sub.2, CaBr.sub.2, SrBr.sub.2, BaBr.sub.2, BeI.sub.2, MgI.sub.2, CaI.sub.2, SrI.sub.2, and BaI.sub.2.

[0237] Examples of the transition metal halide may include a titanium halide (for example, TiF.sub.4, TiCl.sub.4, TiBr.sub.4, TiI.sub.4, etc.), a zirconium halide (for example, ZrF.sub.4, ZrCl.sub.4, ZrBr.sub.4, ZrI.sub.4, etc.), a hafnium halide (for example, HfF.sub.4, HfCl.sub.4, HfBr.sub.4, HfI.sub.4, etc.), a vanadium halide (for example, VF.sub.3, VCl.sub.3, VBr.sub.3, VI.sub.3, etc.), a niobium halide (for example, NbF.sub.3, NbCl.sub.3, NbBr.sub.3, NbI.sub.3, etc.), a tantalum halide (for example, TaF.sub.3, TaCl.sub.3, TaBr.sub.3, TaI.sub.3, etc.), a chromium halide (for example, CrF.sub.3, CrCl.sub.3, CrBr.sub.3, CrI.sub.3, etc.), a molybdenum halide (for example, MoF.sub.3, MoCl.sub.3, MoBr.sub.3, MoI.sub.3, etc.), a tungsten halide (for example, WF.sub.3, WCl.sub.3, WBr.sub.3, WI.sub.3, etc.), a manganese halide (for example, MnF.sub.2, MnCl.sub.2, MnBr.sub.2, MnI.sub.2, etc.), a technetium halide (for example, TcF.sub.2, TcCl.sub.2, TcBr.sub.2, TcI.sub.2, etc.), a rhenium halide (for example, ReF.sub.2, ReCl.sub.2, ReBr.sub.2, ReI.sub.2, etc.), an iron halide (for example, FeF.sub.2, FeCl.sub.2, FeBr.sub.2, FeI.sub.2, etc.), a ruthenium halide (for example, RuF.sub.2, RuCl.sub.2, RuBr.sub.2, RuI.sub.2, etc.), an osmium halide (for example, OsF.sub.2, OsCl.sub.2, OsBr.sub.2, OsI.sub.2, etc.), a cobalt halide (for example, CoF.sub.2, CoCl.sub.2, CoBr.sub.2, CoI.sub.2, etc.), a rhodium halide (for example, RhF.sub.2, RhCl.sub.2, RhBr.sub.2, RhI.sub.2, etc.), an iridium halide (for example, IrF.sub.2, IrCl.sub.2, IrBr.sub.2, IrI.sub.2, etc.), a nickel halide (for example, NiF.sub.2, NiCl.sub.2, NiBr.sub.2, NiI.sub.2, etc.), a palladium halide (for example, PdF.sub.2, PdCl.sub.2, PdBr.sub.2, PdI.sub.2, etc.), a platinum halide (for example, PtF.sub.2, PtCl.sub.2, PtBr.sub.2, PtI.sub.2, etc.), a copper halide (for example, CuF, CuCl, CuBr, CuI, etc.), a silver halide (for example, AgF, AgCl, AgBr, AgI, etc.), and a gold halide (for example, AuF, AuCl, AuBr, AuI, etc.).

[0238] Examples of the post-transition metal halide may include a zinc halide (for example, ZnF.sub.2, ZnCl.sub.2, ZnBr.sub.2, ZnI.sub.2, etc.), an indium halide (for example, InI.sub.3, etc.), and a tin halide (for example, SnI.sub.2, etc.).

[0239] Examples of the lanthanide metal halide may include YbF, YbF.sub.2, YbF.sub.3, SmF.sub.3, YbCl, YbCl.sub.2, YbCl.sub.3 SmCl.sub.3, YbBr, YbBr.sub.2, YbBr.sub.3 SmBr.sub.3, YbI, YbI.sub.2, YbI.sub.3, and SmI.sub.3

[0240] Examples of the metalloid halide may include an antimony halide (for example, SbCl.sub.5, etc.).

[0241] Examples of the metal telluride may include an alkali metal telluride (for example, Li.sub.2Te, Na.sub.2Te, K.sub.2Te, Rb.sub.2Te, Cs.sub.2Te, etc.), an alkaline earth metal telluride (for example, BeTe, MgTe, CaTe, SrTe, BaTe, etc.), a transition metal telluride (for example, TiTe.sub.2, ZrTe.sub.2, HfTe.sub.2, V.sub.2Te.sub.3, Nb.sub.2Te.sub.3, Ta.sub.2Te.sub.3, Cr.sub.2Te.sub.3, Mo.sub.2Te.sub.3, W.sub.2Te.sub.3, MnTe, TcTe, ReTe, FeTe, RuTe, OsTe, CoTe, RhTe, IrTe, NiTe, PdTe, PtTe, Cu.sub.2Te, CuTe, Ag.sub.2Te, AgTe, Au.sub.2Te, etc.), a post-transition metal telluride (for example, ZnTe, etc.), and a lanthanide metal telluride (for example, LaTe, CeTe, PrTe, NdTe, PmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, etc.).

[0242] [Emission layer in interlayer 130]

[0243] When the light-emitting device 10 is a full-color light-emitting device, the emission layer may be patterned into a red emission layer, a green emission layer, and/or a blue emission layer, according to a subpixel. In embodiments, the emission layer may have a stacked structure of two or more layers of a red emission layer, a green emission layer, and a blue emission layer, in which the two or more layers may contact each other or may be separated from each other to emit white light. In embodiments, the emission layer may include two or more materials of a red light-emitting material, a green light-emitting material, and a blue light-emitting material, in which the two or more materials are mixed with each other in a single layer to emit white light.

[0244] The emission layer may include a host and a dopant. The dopant may include a phosphorescent dopant, a fluorescent dopant, or any combination thereof.

[0245] The dopant may include the organometallic compound represented by Formula 1.

[0246] An amount of the dopant in the emission layer may be in a range of about 0.01 parts by weight to about 15 parts by weight, based on 100 parts by weight of the host.

[0247] In embodiments, the emission layer may include a quantum dot.

[0248] In an embodiment, the emission layer may include a delayed fluorescence material. The delayed fluorescence material may serve as a host or as a dopant in the emission layer.

[0249] A thickness of the emission layer may be in a range of about 100 Å to about 1,000 Å. For example, the thickness of the emission layer may be in a range of about 200 Å to about 600 Å. When the thickness of the emission layer is within these ranges, excellent light-emission characteristics may be obtained without a substantial increase in driving voltage.

[0250] In embodiments, the host may include a compound represented by Formula 301.

[Ar.sub.301].sub.xb11-[(L.sub.301).sub.xb1-R.sub.301].sub.xb21  [Formula 301]

[0251] In Formula 301,

[0252] Ar.sub.301 and L.sub.301 may each independently be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0253] xb11 may be 1, 2, or 3,

[0254] xb1 may be an integer from 0 to 5,

[0255] R.sub.301 may be hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkenyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.2-C.sub.60 alkynyl group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 alkoxy group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.301)(Q.sub.302)(Q.sub.303), —N(Q.sub.301)(Q.sub.302), —B(Q.sub.301)(Q.sub.302), —C(═O)(Q.sub.301), —S(═O).sub.2(Q.sub.301), or —P(═O)(Q.sub.301)(Q.sub.302),

[0256] xb21 may be an integer from 1 to 5, and

[0257] Q.sub.301 to Q.sub.303 are each independently the same as described in connection with Q.sub.1.

[0258] For example, in Formula 301, when xb11 is 2 or more, two or more of Ar.sub.301(s) may be bonded to each other via a single bond.

[0259] In embodiments, the host may include a compound represented by Formula 301-1, a compound represented by Formula 301-2, or any combination thereof:

##STR00084##

[0260] In Formulae 301-1 and 301-2,

[0261] ring A.sub.301 to ring A.sub.304 may each independently be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0262] X.sub.301 may be O, S, N-[(L.sub.304).sub.xb4-R.sub.304], C(R.sub.304)(R.sub.305), or Si(R.sub.304)(R.sub.305),

[0263] xb22 and xb23 may each independently be 0, 1, or 2,

[0264] L.sub.301, xb1, and R.sub.301 may each be the same as described herein,

[0265] L.sub.302 to L.sub.304 may each independently be the same as described in connection with L.sub.301,

[0266] xb2 to xb4 may each independently be the same as described in connection with xb1, and

[0267] R.sub.302 to R.sub.305 and R.sub.311 to R.sub.314 may each independently be the same as described in connection with R.sub.301.

[0268] In an embodiment, the host may include an alkaline earth-metal complex. For example, the host may include a Be complex (for example, Compound H55), an Mg complex, a Zn complex, or any combination thereof.

[0269] In embodiments, the host may be one of Compounds H1 to H126, 9,10-di(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthalen-2-yl)anthracene (MADN), 9,10-di-(2-naphthyl)-2-t-butyl-anthracene (TBADN), 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP), 1,3-di-9-carbazolylbenzene (mCP), 3,3-Di(9H-carbazol-9-yl)biphenyl (mCBP), 1,3,5-tri(carbazol-9-yl)benzene (TCP), or any combination thereof:

##STR00085## ##STR00086## ##STR00087## ##STR00088## ##STR00089## ##STR00090## ##STR00091## ##STR00092## ##STR00093## ##STR00094## ##STR00095## ##STR00096## ##STR00097## ##STR00098## ##STR00099## ##STR00100## ##STR00101## ##STR00102## ##STR00103## ##STR00104## ##STR00105##

[0270] [Delayed Fluorescence Material]

[0271] The emission layer may include a delayed fluorescence material.

[0272] In the specification, the delayed fluorescence material may be selected from compounds capable of emitting delayed fluorescence based on a delayed fluorescence emission mechanism.

[0273] The delayed fluorescence material included in the emission layer may serve as a host or as a dopant, depending on the type of other materials included in the emission layer.

[0274] In embodiments, a difference between a triplet energy level (eV) of the delayed fluorescence material and a singlet energy level (eV) of the delayed fluorescence material may be greater than or equal to about 0 eV and less than or equal to about 0.5 eV. When the difference between the triplet energy level (eV) of the delayed fluorescence material and the singlet energy level (eV) of the delayed fluorescence material satisfies the above-described range, up-conversion from the triplet state to the singlet state of the delayed fluorescence materials may effectively occur, and thus, the luminescence efficiency of the light-emitting device 10 may be improved.

[0275] For example, the delayed fluorescence material may include a material including at least one electron donor (for example, a π electron-rich C.sub.3-C.sub.60 cyclic group, such as a carbazole group) and at least one electron acceptor (for example, a sulfoxide group, a cyano group, or a π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group); or a material including a C.sub.8-C.sub.60 polycyclic group in which two or more cyclic groups are condensed while sharing boron (B).

[0276] Examples of the delayed fluorescence material may include at least one of Compounds DF1 to DF9:

##STR00106## ##STR00107## ##STR00108##

[0277] [Quantum Dot]

[0278] The emission layer may include a quantum dot.

[0279] In the specification a quantum dot may be a crystal of a semiconductor compound, and may include any material capable of emitting light of various emission wavelengths according to a size of the crystal.

[0280] A diameter of the quantum dot may be, for example, in a range of about 1 nm to about 10 nm.

[0281] The quantum dot may be synthesized by a wet chemical process, a metal organic chemical vapor deposition process, a molecular beam epitaxy process, or any process similar thereto.

[0282] The wet chemical process is a method that include mixing a precursor material with an organic solvent and growing a quantum dot particle crystal. When the crystal grows, the organic solvent naturally acts as a dispersant coordinated on the surface of the quantum dot crystal and controls the growth of the crystal so that the growth of quantum dot particles can be controlled through a process which costs lower, and may be more readily performed than vapor deposition methods, such as metal organic chemical vapor deposition (MOCVD) or molecular beam epitaxy (MBE),

[0283] The quantum dot may include Group II-VI semiconductor compounds, Group III-V semiconductor compounds, Group III-VI semiconductor compounds, Group I-Ill-VI semiconductor compounds, Group IV-VI semiconductor compounds, a Group IV element or compound, or any combination thereof.

[0284] Examples of the Group II-VI semiconductor compound may include: a binary compound, such as CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnO, HgS, HgSe, HgTe, MgSe, or MgS; a ternary compound, such as CdSeS, CdSeTe, CdSTe, ZnSeS, ZnSeTe, ZnSTe, HgSeS, HgSeTe, HgSTe, CdZnS, CdZnSe, CdZnTe, CdHgS, CdHgSe, CdHgTe, HgZnS, HgZnSe, HgZnTe, MgZnSe, or MgZnS; a quaternary compound, such as CdZnSeS, CdZnSeTe, CdZnSTe, CdHgSeS, CdHgSeTe, CdHgSTe, HgZnSeS, HgZnSeTe, or HgZnSTe; or any combination thereof.

[0285] Examples of the Group III-V semiconductor compound may include: a binary compound, such as GaN, GaP, GaAs, GaSb, AlN, AlP, AlAs, AlSb, InN, InP, InAs, InSb, or the like; a ternary compound, such as GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InNP, InAlP, InNAs, InNSb, InPAs, InPSb, GaAlNP, or the like; a quaternary compound, such as GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, InAlPSb, or the like; or any combination thereof. In an embodiment, the Group III-V semiconductor compound may further include a Group II element.

[0286] Examples of the Group III-V semiconductor compound further including a Group II element may include InZnP, InGaZnP, InAlZnP, etc.

[0287] Examples of the Group III-VI semiconductor compound may include: a binary compound, such as GaS, GaSe, Ga.sub.2Se.sub.3, GaTe, InS, InSe, In.sub.2Se.sub.3, or InTe; a ternary compound, such as InGaS.sub.3 or InGaSe.sub.3; or any combination thereof.

[0288] Examples of the Group semiconductor compound may include: a ternary compound, such as AgInS, AgInS.sub.2, CuInS, CuInS.sub.2, CuGaO.sub.2, AgGaO.sub.2, or AgAlO.sub.2; or any combination thereof.

[0289] Examples of the Group IV-VI semiconductor compound may include: a binary compound, such as SnS, SnSe, SnTe, PbS, PbSe, or PbTe; a ternary compound, such as SnSeS, SnSeTe, SnSTe, PbSeS, PbSeTe, PbSTe, SnPbS, SnPbSe, or SnPbTe; a quaternary compound, such as SnPbSSe, SnPbSeTe, or SnPbSTe; or any combination thereof.

[0290] Examples of the Group IV element or compound may include: a single element material, such as Si or Ge; a binary compound, such as SiC or SiGe; or any combination thereof.

[0291] Each element included in a multi-element compound such as a binary compound, a ternary compound, or a quaternary compound may be present in a particle at a uniform concentration or at a non-uniform concentration.

[0292] The quantum dot may have a single structure in which the concentration of each element in the quantum dot is uniform, or the quantum dot may have a core-shell structure. In case that the quantum dot has a core-shell structure, a material included in the core and a material included in the shell may be different from each other.

[0293] The shell of the quantum dot may serve as a protective layer that prevents chemical degeneration of the core to maintain semiconductor characteristics, and/or may serve as a charging layer that imparts electrophoretic characteristics to the quantum dot. The shell may be a single layer or a multi-layer. An interface between the core and the shell may have a concentration gradient in which the concentration of an element that is present in the shell decreases toward the core.

[0294] Examples of the shell of the quantum dot may include a metal oxide, a non-metal oxide, a semiconductor compound, and any combination thereof. Examples of the metal oxide or the non-metal oxide may include a binary compound, such as SiO.sub.2, Al.sub.2O.sub.3, TiO.sub.2, ZnO, MnO, Mn.sub.2O.sub.3, Mn.sub.3O.sub.4, CuO, FeO, Fe.sub.2O.sub.3, Fe.sub.3O.sub.4, CoO, Co.sub.3O.sub.4, or NiO; a ternary compound, such as MgAl.sub.2O.sub.4, CoFe.sub.2O.sub.4, NiFe.sub.2O.sub.4, or CoMn.sub.2O.sub.4; and any combination thereof. Examples of the semiconductor compound may include, as described herein, a Group III-VI semiconductor compound, a Group II-VI semiconductor compound, a Group III-V semiconductor compound, a Group III-VI semiconductor compound, a Group I-III-VI semiconductor compound, a Group IV-VI semiconductor compound, or any combination thereof. For example, the semiconductor compound may include CdS, CdSe, CdTe, ZnS, ZnSe, ZnTe, ZnSeS, ZnTeS, GaAs, GaP, GaSb, HgS, HgSe, HgTe, InAs, InP, InGaP, InSb, AlAs, AlP, AlSb, or any combination thereof.

[0295] A full width at half maximum (FWHM) of the emission wavelength spectrum of the quantum dot may be equal to or less than about 45 nm. For example, a FWHM of the emission wavelength spectrum of the quantum dot may be equal to or less than about 40 nm. For example, a FWHM of the emission wavelength spectrum of the quantum dot may be equal to or less than about 30 nm. Within these ranges, color purity or color reproducibility may be increased. Light emitted through the quantum dot may be emitted in all directions, so that a wide viewing angle may be improved.

[0296] The quantum dot may be in the form of a spherical particle, a pyramidal particle, a multi-arm particle, a cubic nanoparticle, a nanotube particle, a nanowire particle, a nanofiber particle, or a nanoplate particle.

[0297] Since the energy band gap may be adjusted by controlling the size of the quantum dot, light having various wavelength bands may be obtained from the quantum dot emission layer. Accordingly, by using quantum dots of different sizes, a light-emitting device that emits light of various wavelengths may be implemented. In embodiments, the size of the quantum dot may be selected to emit red, green, and/or blue light. The size of the quantum dot may be configured to emit white light by the combination of light of various colors.

[0298] [Electron Transport Region in Interlayer 130]

[0299] The electron transport region may have a structure consisting of a layer consisting of a single material, a structure consisting of a layer consisting of different materials, or a structure including multiple layers including different materials.

[0300] The electron transport region may include a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0301] For example, the electron transport region may have an electron transport layer/electron injection layer structure, a hole blocking layer/electron transport layer/electron injection layer structure, an electron control layer/electron transport layer/electron injection layer structure, or a buffer layer/electron transport layer/electron injection layer structure, wherein the layers of each structure may be stacked from an emission layer in its respective stated order, but the structure of the electron transport region is not limited thereto.

[0302] In an embodiment, the electron transport region (for example, the buffer layer, the hole blocking layer, the electron control layer, or the electron transport layer in the electron transport region) may include a metal-free compound including at least one π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group.

[0303] For example, the electron transport region may include a compound represented by Formula 601:

[Ar.sub.601].sub.xe11-[(L.sub.601).sub.xe1-R.sub.601].sub.xe21  [Formula 601]

[0304] In Formula 601,

[0305] Ar.sub.601 and L.sub.601 may each independently be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a,

[0306] xe11 may be 1, 2, or 3,

[0307] xe1 may be 0, 1, 2, 3, 4, or 5,

[0308] R.sub.601 may be a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a, —Si(Q.sub.601)(Q.sub.602)(Q.sub.603), —C(═O)(Q.sub.601), —S(═O).sub.2(Q.sub.601), or —P(═O)(Q.sub.601)(Q.sub.602),

[0309] Q.sub.601 to Q.sub.603 may each independently be the same as described in connection with Q.sub.1,

[0310] xe21 may be 1, 2, 3, 4, or 5, and

[0311] at least one of Ar.sub.601, L.sub.601, and R.sub.601 may each independently be air electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group that is unsubstituted or substituted with at least one R.sub.10a.

[0312] For example, in Formula 601, when xe11 is 2 or more, two or more of Ar.sub.601(s) may be bonded to each other via a single bond.

[0313] In embodiments, in Formula 601, Ar.sub.601 may be a substituted or unsubstituted anthracene group.

[0314] In embodiments, the electron transport region may include a compound represented by Formula 601-1:

##STR00109##

[0315] In Formula 601-1,

[0316] X.sub.614 may be N or C(R.sub.614), X.sub.615 may be N or C(R.sub.615), X.sub.616 may be N or C(R.sub.616), and at least one of X.sub.614 to X.sub.616 may be N,

[0317] L.sub.611 to L.sub.613 may each independently be the same as described in connection with L.sub.601,

[0318] xe611 to xe613 may each independently be the same as described in connection with xe1,

[0319] R.sub.611 to R.sub.613 may each independently be the same as described in connection with R.sub.601, and

[0320] R.sub.614 to R.sub.616 may each independently be hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.20 alkyl group, a C.sub.1-C.sub.20 alkoxy group, a C.sub.3-C.sub.60 carbocyclic group that is unsubstituted or substituted with at least one R.sub.10a, or a C.sub.1-C.sub.60 heterocyclic group that is unsubstituted or substituted with at least one R.sub.10a.

[0321] For example, in Formulae 601 and 601-1, xe1 and xe611 to xe613 may each independently be 0, 1, or 2.

[0322] The electron transport region may include one of Compounds ET1 to ET45, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-1phenanthroline (Bphen), diphenyl(4-(triphenylsilyl)phenyl)-phosphine oxide (TSPO1), Alq.sub.3, BAlq, TAZ, NTAZ, or any combination thereof:

##STR00110## ##STR00111## ##STR00112## ##STR00113## ##STR00114## ##STR00115## ##STR00116## ##STR00117## ##STR00118## ##STR00119## ##STR00120## ##STR00121## ##STR00122## ##STR00123## ##STR00124## ##STR00125##

[0323] A thickness of the electron transport region may be in a range of about 160 Å to about 5,000 Å. For example, the thickness of the electron transport region may be in a range of about 100 Å to about 4,000 Å. When the electron transport region includes a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, or any combination thereof, a thickness of the buffer layer, the hole blocking layer, or the electron control layer may each independently be in a range of about 20 Å to about 1,000 Å, and a thickness of the electron transport layer may be in a range of about 100 Å to about 1,000 Å. For example, the thickness of the buffer layer, the hole blocking layer, or the electron control layer may each independently be in a range of about 30 Å to about 300 Å. For example, the thickness of the electron transport layer may be in a range of about 150 Å to about 500 Å. When the thickness of the buffer layer, the hole blocking layer, the electron control layer, the electron transport layer, and/or the electron transport region are within these ranges, satisfactory electron transporting characteristics may be obtained without a substantial increase in driving voltage.

[0324] The electron transport region (for example, the electron transport layer in the electron transport region) may further include, in addition to the materials described above, a metal-containing material.

[0325] The metal-containing material may include an alkali metal complex, an alkaline earth metal complex, or any combination thereof. A metal ion of an alkali metal complex may be a Li ion, a Na ion, a K ion, a Rb ion, or a Cs ion, and a metal ion of an alkaline earth metal complex may be a Be ion, a Mg ion, a Ca ion, a Sr ion, or a Ba ion. A ligand coordinated with the metal ion of the alkali metal complex or the metal ion of the alkaline earth-metal complex may each independently include a hydroxyquinoline, a hydroxyisoquinoline, a hydroxybenzoquinoline, a hydroxyacridine, a hydroxyphenanthridine, a hydroxyphenyloxazole, a hydroxyphenylthiazole, a hydroxydiphenyloxadiazole, a hydroxydiphenylthiadiazole, a hydroxyphenylpyridine, a hydroxyphenylbenzimidazole, a hydroxyphenylbenzothiazole, a bipyridine, a phenanthroline, a cyclopentadiene, or any combination thereof.

[0326] In an embodiment, the metal-containing material may include a Li complex. The Li complex may include, for example, Compound ET-D1 (LiQ) or Compound ET-D2:

##STR00126##

[0327] The electron transport region may include an electron injection layer that facilitates the injection of electrons from the second electrode 150. The electron injection layer may directly contact the second electrode 150.

[0328] The electron injection layer may have a structure consisting of a layer consisting of a single material, a structure consisting of a layer consisting of different materials, or a structure including multiple layers including different materials.

[0329] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0330] The alkali metal may include Li, Na, K, Rb, Cs, or any combination thereof. The alkaline earth metal may include Mg, Ca, Sr, Ba, or any combination thereof. The rare earth metal may include Sc, Y, Ce, Tb, Yb, Gd, or any combination thereof.

[0331] The alkali metal-containing compound, the alkaline earth metal-containing compound, and the rare earth metal-containing compound may include oxides, halides (for example, fluorides, chlorides, bromides, or iodides), or tellurides of the alkali metal, the alkaline earth metal, and the rare earth metal, or any combination thereof.

[0332] The alkali metal-containing compound may include: alkali metal oxides, such as Li.sub.2O, Cs.sub.2O, or K.sub.2O; alkali metal halides, such as LiF, NaF, CsF, KF, LiI, NaI, CsI, KI, or RbI; or any combination thereof. The alkaline earth metal-containing compound may include an alkaline earth metal compound, such as BaO, SrO, CaO, Ba.sub.xSr.sub.1-xO (wherein x is a real number satisfying the condition of 0<x<1), Ba.sub.xCa.sub.1-xO (wherein x is a real number satisfying the condition of 0<x<1), or the like. The rare earth metal-containing compound may include YbF.sub.3, ScF.sub.3, Sc.sub.2O.sub.3, Y.sub.2O.sub.3, Ce.sub.2O.sub.3, GdF.sub.3, TbF.sub.3, YbI.sub.3, ScI.sub.3, TbI.sub.3, or any combination thereof. In embodiments, the rare earth metal-containing compound may include a lanthanide metal telluride. Examples of the lanthanide metal telluride may include LaTe, CeTe, PrTe, NdTe, PmTe, SmTe, EuTe, GdTe, TbTe, DyTe, HoTe, ErTe, TmTe, YbTe, LuTe, La.sub.2Te.sub.3, Ce.sub.2Te.sub.3, Pr.sub.2Te.sub.3, Nd.sub.2Te.sub.3, Pm.sub.2Te.sub.3, Sm.sub.2Te.sub.3, Eu.sub.2Te.sub.3, Gd.sub.2Te.sub.3, Tb.sub.2Te.sub.3, Dy.sub.2Te.sub.3, Ho.sub.2Te.sub.3, Er.sub.2Te.sub.3, Tm.sub.2Te.sub.3, Yb.sub.2Te.sub.3, and Lu.sub.2Te.sub.3.

[0333] The alkali metal complex, the alkaline earth-metal complex, and the rare earth metal complex may include one of ions of the alkali metal, ions of the alkaline earth metal, and ions of the rare earth metal, and a ligand bonded to the metal ion (for example, a hydroxyquinoline, a hydroxyisoquinoline, a hydroxybenzoquinoline, a hydroxyacridine, a hydroxyphenanthridine, a hydroxyphenyloxazole, a hydroxyphenylthiazole, a hydroxydiphenyloxadiazole, a hydroxydiphenylthiadiazole, a hydroxyphenylpyridine, a hydroxyphenyl benzimidazole, a hydroxyphenylbenzothiazole, a bipyridine, a phenanthroline, a cyclopentadiene, or any combination thereof).

[0334] The electron injection layer may consist of an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof, as described above. In embodiments, the electron injection layer may further include an organic material (for example, a compound represented by Formula 601).

[0335] In embodiments, the electron injection layer may consist of an alkali metal-containing compound (for example, an alkali metal halide); or the electron injection layer may consist of an alkali metal-containing compound (for example, an alkali metal halide), and an alkali metal, an alkaline earth metal, a rare earth metal, or any combination thereof. For example, the electron injection layer may be a KI:Yb co-deposited layer, an RbI:Yb co-deposited layer, a LiF:Yb co-deposited layer, or the like.

[0336] When the electron injection layer further includes an organic material, an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal-containing compound, an alkaline earth metal-containing compound, a rare earth metal-containing compound, an alkali metal complex, an alkaline earth-metal complex, a rare earth metal complex, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix including the organic material.

[0337] A thickness of the electron injection layer may be in a range of about 1 Å to about 100 Å. For example, the thickness of the electron injection layer may be in a range of about 3 Å to about 90 Å. When the thickness of the electron injection layer is within the ranges described above, satisfactory electron injection characteristics may be obtained without a substantial increase in driving voltage.

[0338] [Second Electrode 150]

[0339] The second electrode 150 may be located on the interlayer 130 having a structure as described above. The second electrode 150 may be a cathode, which is an electron injection electrode. The second electrode 150 may include a material having a low-work function, for example, a metal, an alloy, an electrically conductive compound, or any combination thereof.

[0340] The second electrode 150 may include lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag), ytterbium (Yb), silver-ytterbium (Ag—Yb), ITO, IZO, or any combination thereof. The second electrode 150 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0341] The second electrode 150 may have a single-layered structure or a multi-layered structure.

[0342] [Capping Layer]

[0343] The light-emitting device 10 may include a first capping layer located outside the first electrode 110, and/or a second capping layer located outside the second electrode 150. For example, the light-emitting device 10 may have a structure in which the first capping layer, the first electrode 110, the interlayer 130, and the second electrode 150 are stacked in this stated order, a structure in which the first electrode 110, the interlayer 130, the second electrode 150, and the second capping layer are stacked in this stated order, or a structure in which the first capping layer, the first electrode 110, the interlayer 130, the second electrode 150, and the second capping layer are stacked in this stated order.

[0344] Light generated in an emission layer of the interlayer 130 of the light-emitting device 10 may be extracted toward the outside through the first electrode 110, which may be a semi-transmissive electrode or a transmissive electrode, and through the first capping layer. Light generated in an emission layer of the interlayer 130 of the light-emitting device 10 may be extracted toward the outside through the second electrode 150, which may be a semi-transmissive electrode or a transmissive electrode, and through the second capping layer.

[0345] The first capping layer and the second capping layer may each increase external emission efficiency according to the principle of constructive interference. Accordingly, the light extraction efficiency of the light-emitting device 10 may be increased, so that the luminescence efficiency of the light-emitting device 10 may be improved.

[0346] The first capping layer and the second capping layer may each include a material having a refractive index equal to or greater than about 1.6 (with respect to a wavelength of about 589 nm).

[0347] The first capping layer and the second capping layer may each independently be an organic capping layer including an organic material, an inorganic capping layer including an inorganic material, or a composite capping layer including an organic material and an inorganic material.

[0348] At least one of the first capping layer and the second capping layer may each independently include carbocyclic compounds, heterocyclic compounds, amine group-containing compounds, porphyrin derivatives, phthalocyanine derivatives, a naphthalocyanine derivatives, alkali metal complexes, alkaline earth metal complexes, or any combination thereof. The carbocyclic compound, the heterocyclic compound, and the amine group-containing compound may be optionally substituted with a substituent including O, N, S, Se, Si, F, Cl, Br, I, or any combination thereof.

[0349] In embodiments, at least one of the first capping layer and the second capping layer may each independently include an amine group-containing compound.

[0350] For example, at least one of the first capping layer and the second capping layer may each independently include a compound represented by Formula 201, a compound represented by Formula 202, or any combination thereof.

[0351] In embodiments, at least one of the first capping layer and the second capping layer may each independently include one of Compounds HT28 to HT33, one of Compounds CP1 to CP6, β-NPB, or any combination thereof:

##STR00127## ##STR00128##

[0352] [Electronic Apparatus]

[0353] The light-emitting device may be included in various electronic apparatuses. For example, the electronic apparatus including the light-emitting device may be a light-emitting apparatus, an authentication apparatus, or the like.

[0354] The electronic apparatus (for example, a light-emitting apparatus) may further include, in addition to the light-emitting device, a color filter, a color conversion layer, or a color filter and a color conversion layer. The color filter and/or the color conversion layer may be located in at least one traveling direction of light emitted from the light-emitting device. For example, the light emitted from the light-emitting device may be blue light or white light. For details on the light-emitting device, related descriptions provided above may be referred to. In embodiments, the color conversion layer may include a quantum dot. The quantum dot may be, for example, a quantum dot as described herein.

[0355] The electronic apparatus may include a first substrate. The first substrate may include subpixels, the color filter may include color filter areas respectively corresponding to the subpixels, and the color conversion layer may include color conversion areas respectively corresponding to the subpixels.

[0356] A pixel-defining film may be located between the subpixels to define each subpixel.

[0357] The color filter may further include color filter areas and light-shielding patterns located between the color filter areas, and the color conversion layer may further include color conversion areas and light-shielding patterns located between the color conversion areas.

[0358] The color filter areas (or the color conversion areas) may include a first area emitting first color light, a second area emitting second color light, and/or a third area emitting third color light, wherein the first color light, the second color light, and/or the third color light may have different maximum emission wavelengths from one another. For example, the first color light may be red light, the second color light may be green light, and the third color light may be blue light. In an embodiment, the color filter areas (or the color conversion areas) may include quantum dots. For example, the first area may include a red quantum dot, the second area may include a green quantum dot, and the third area may not include a quantum dot. For details on the quantum dot, related descriptions provided herein may be referred to. The first area, the second area, and/or the third area may each further include a scatterer.

[0359] For example, the light-emitting device may emit first light, the first area may absorb the first light to emit first-first color light, the second area may absorb the first light to emit second-first color light, and the third area may absorb the first light to emit third-first color light. The first-first color light, the second-first color light, and the third-first color light may have different maximum emission wavelengths from one another. For example, the first light may be blue light, the first-first color light may be red light, the second-first color light may be green light, and the third-first color light may be blue light.

[0360] The electronic apparatus may further include a thin-film transistor, in addition to the light-emitting device as described herein. The thin-film transistor may include a source electrode, a drain electrode, and an active layer, wherein any one of the source electrode and the drain electrode may be electrically connected to any one of the first electrode and the second electrode of the light-emitting device.

[0361] The thin-film transistor may further include a gate electrode, a gate insulating film, or the like.

[0362] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, or the like.

[0363] The electronic apparatus may further include a sealing portion for sealing the light-emitting device. The sealing portion may be located between the color conversion layer and/or color filter, and the light-emitting device. The sealing portion may allow light from the light-emitting device to be extracted to the outside, and may simultaneously prevent ambient air and moisture from penetrating into the light-emitting device. The sealing portion may be a sealing substrate including a transparent glass substrate or a plastic substrate. The sealing portion may be a thin-film encapsulation layer including an organic layer and/or an inorganic layer. When the sealing portion is a thin film encapsulation layer, the electronic apparatus may be flexible.

[0364] Various functional layers may be further included on the sealing portion, in addition to the color filter and/or the color conversion layer, according to the use of the electronic apparatus. Examples of the functional layers may include a touch screen layer, a polarizing layer, an authentication apparatus, and the like. The touch screen layer may be a pressure-sensitive touch screen layer, a capacitive touch screen layer, or an infrared touch screen layer. The authentication apparatus may be, for example, a biometric authentication apparatus that authenticates an individual by using biometric information of a living body (for example, fingertips, pupils, etc.).

[0365] The authentication apparatus may further include, in addition to the light-emitting device as described above, a biometric information collector.

[0366] The electronic apparatus may be applied to various displays, light sources, lighting, personal computers (for example, a mobile personal computer), mobile phones, digital cameras, electronic organizers, electronic dictionaries, electronic game machines, medical instruments (for example, electronic thermometers, sphygmomanometers, blood glucose meters, pulse measurement devices, pulse wave measurement devices, electrocardiogram displays, ultrasonic diagnostic devices, or endoscope displays), fish finders, various measuring instruments, meters (for example, meters for a vehicle, an aircraft, and a vessel), projectors, and the like.

[0367] [Description of FIGS. 2 and 3]

[0368] FIG. 2 is a schematic cross-sectional view showing an electronic apparatus according to an embodiment.

[0369] The electronic apparatus of FIG. 2 includes a substrate 100, a thin-film transistor (TFT), a light-emitting device, and an encapsulation portion 300 that seals the light-emitting device.

[0370] The substrate 100 may be a flexible substrate, a glass substrate, or a metal substrate. A buffer layer 210 may be located on the substrate 100. The buffer layer 210 may prevent penetration of impurities through the substrate 100 and may provide a flat surface on the substrate 100.

[0371] A TFT may be located on the buffer layer 210. The TFT may include an active layer 220, a gate electrode 240, a source electrode 260, and a drain electrode 270.

[0372] The active layer 220 may include an inorganic semiconductor such as silicon or polysilicon, an organic semiconductor, or an oxide semiconductor, and may include a source region, a drain region, and a channel region.

[0373] A gate insulating film 230 for insulating the active layer 220 from the gate electrode 240 may be located on the active layer 220, and the gate electrode 240 may be located on the gate insulating film 230.

[0374] An interlayer insulating film 250 may be located on the gate electrode 240. The interlayer insulating film 250 may be located between the gate electrode 240 and the source electrode 260 and between the gate electrode 240 and the drain electrode 270, to insulate the gate electrode 240, the source electrode 260, and the drain electrode 270 from one another.

[0375] The source electrode 260 and the drain electrode 270 may be located on the interlayer insulating film 250. The interlayer insulating film 250 and the gate insulating film 230 may be formed to expose the source region and the drain region of the active layer 220, and the source electrode 260 and the drain electrode 270 may respectively contact the exposed portions of the source region and the drain region of the activation layer 220.

[0376] The TFT is electrically connected to a light-emitting device to drive the light-emitting device, and is covered and protected by a passivation layer 280. The passivation layer 280 may include an inorganic insulating film, an organic insulating film, or any combination thereof. A light-emitting device is provided on the passivation layer 280. The light-emitting device may include a first electrode 110, an interlayer 130, and a second electrode 150.

[0377] The first electrode 110 may be located on the passivation layer 280. The passivation layer 280 may expose a portion of the drain electrode 270 and may not completely cover the drain electrode 270, and the first electrode 110 may be electrically connected to the exposed portion of the drain electrode 270.

[0378] A pixel defining layer 290 including an insulating material may be located on the first electrode 110. The pixel defining layer 290 may expose a region of the first electrode 110, and an interlayer 130 may be formed in the exposed region of the first electrode 110. The pixel defining layer 290 may be a polyimide or polyacrylic organic film. Although not shown in FIG. 2, at least some layers of the interlayer 130 may extend beyond the upper portion of the pixel defining layer 290 to be provided in the form of a common layer.

[0379] The second electrode 150 may be located on the interlayer 130, and a capping layer 170 may be additionally formed on the second electrode 150. The capping layer 170 may be formed to cover the second electrode 150.

[0380] The encapsulation portion 300 may be located on the capping layer 170. The encapsulation portion 300 may be located on a light-emitting device to protect the light-emitting device from moisture and/or oxygen. The encapsulation portion 300 may include: an inorganic film including silicon nitride (SiNx), silicon oxide (SiOx), indium tin oxide, indium zinc oxide, or any combination thereof; an organic film including polyethylene terephthalate, polyethylene naphthalate, polycarbonate, polyimide, polyethylene sulfonate, polyoxymethylene, polyarylate, hexamethyldisiloxane, an acrylic resin (for example, polymethyl methacrylate, polyacrylic acid, or the like), an epoxy-based resin (for example, aliphatic glycidyl ether (AGE), or the like), or any combination thereof; or any combination of the inorganic films and the organic films.

[0381] FIG. 3 is a schematic cross-sectional view showing an electronic apparatus according to another embodiment.

[0382] The electronic apparatus of FIG. 3 may differ from the electronic apparatus of FIG. 2, at least in that a light-shielding pattern 500 and a functional region 400 are further included on the encapsulation portion 300. The functional region 400 may be a color filter area, a color conversion area, or a combination of the color filter area and the color conversion area. In an embodiment, the light-emitting device included in the electronic apparatus of FIG. 3 may be a tandem light-emitting device.

[0383] [Manufacturing method]

[0384] The layers included in the hole transport region, the emission layer, and the layers included in the electron transport region may be formed in a certain region by using various methods such as vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, ink-jet printing, laser-printing, laser-induced thermal imaging, and the like.

[0385] When layers constituting the hole transport region, an emission layer, and layers constituting the electron transport region are formed by vacuum deposition, the deposition may be performed at a deposition temperature of about 100° C. to about 500° C., a vacuum degree of about 10.sup.−8 torr to about 10.sup.−3 torr, and a deposition speed of about 0.01 Å/sec to about 100 Å/sec, depending on a material to be included in a layer to be formed and the structure of a layer to be formed.

Definitions of Terms

[0386] The term “C.sub.3-C.sub.60 carbocyclic group” as used herein may be a cyclic group consisting of carbon as the only ring-forming atoms and having three to sixty carbon atoms, and the term “C.sub.1-C.sub.60 heterocyclic group” as used herein may be a cyclic group that has one to sixty carbon atoms and further has, in addition to carbon, at least one heteroatom as a ring-forming atom. The C.sub.3-C.sub.60 carbocyclic group and the C.sub.1-C.sub.60 heterocyclic group may each be a monocyclic group consisting of one ring or a polycyclic group in which two or more rings are condensed with each other. For example, the number of ring-forming atoms in the C.sub.1-C.sub.60 heterocyclic group may be from 3 to 61.

[0387] The term “cyclic group” as used herein may include the C.sub.3-C.sub.60 carbocyclic group or the C.sub.1-C.sub.60 heterocyclic group.

[0388] The term “π electron-rich C.sub.3-C.sub.60 cyclic group” as used herein may be a cyclic group that has three to sixty carbon atoms and may not include *—N═*′ as a ring-forming moiety, and the term “π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group” as used herein may be a heterocyclic group that has one to sixty carbon atoms and may include *—N═*′ as a ring-forming moiety.

[0389] In embodiments,

[0390] the C.sub.3-C.sub.60 carbocyclic group may be a T1 group or a cyclic group in which two or more T1 groups are condensed with each other (for example, a cyclopentadiene group, an adamantane group, a norbornane group, a benzene group, a pentalene group, a naphthalene group, an azulene group, an indacene group, an acenaphthylene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, a chrysene group, a perylene group, a pentaphene group, a heptalene group, a naphthacene group, a picene group, a hexacene group, a pentacene group, a rubicene group, a coronene group, an ovalene group, an indene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, an indenophenanthrene group, or an indenoanthracene group),

[0391] the C.sub.1-C.sub.60 heterocyclic group may be a T2 group, a cyclic group in which two or more T2 groups are condensed with each other, or a cyclic group in which at least one T2 group and at least one T1 group are condensed with each other (for example, a pyrrole group, a thiophene group, a furan group, an indole group, a benzoindole group, a naphthoindole group, an isoindole group, a benzoisoindole group, a naphthoisoindole group, a benzosilole group, a benzothiophene group, a benzofuran group, a carbazole group, a dibenzosilole group, a dibenzothiophene group, a dibenzofuran group, an indenocarbazole group, an indolocarbazole group, a benzofurocarbazole group, a benzothienocarbazole group, a benzosilolocarbazole group, a benzoindolocarbazole group, a benzocarbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a benzonaphthosilole group, a benzofurodibenzofuran group, a benzofurodibenzothiophene group, a benzothienodibenzothiophene group, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzoxazole group, a benzoisoxazole group, a benzothiazole group, a benzoisothiazole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a phenanthroline group, a cinnoline group, a phthalazine group, a naphthyridine group, an imidazopyridine group, an imidazopyrimidine group, an imidazotriazine group, an imidazopyrazine group, an imidazopyridazine group, an azacarbazole group, an azafluorene group, an azadibenzosilole group, an azadibenzothiophene group, an azadibenzofuran group, etc.),

[0392] the π electron-rich C.sub.3-C.sub.60 cyclic group may be a T1 group, a cyclic group in which two or more T1 groups are condensed with each other, a T3 group, a cyclic group in which two or more T3 groups are condensed with each other, or a cyclic group in which at least one T3 group and at least one T1 group are condensed with each other (for example, the C.sub.3-C.sub.60 carbocyclic group, a pyrrole group, a thiophene group, a furan group, an indole group, a benzoindole group, a naphthoindole group, an isoindole group, a benzoisoindole group, a naphthoisoindole group, a benzosilole group, a benzothiophene group, a benzofuran group, a carbazole group, a dibenzosilole group, a dibenzothiophene group, a dibenzofuran group, an indenocarbazole group, an indolocarbazole group, a benzofurocarbazole group, a benzothienocarbazole group, a benzosilolocarbazole group, a benzoindolocarbazole group, a benzocarbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a benzonaphthosilole group, a benzofurodibenzofuran group, a benzofurodibenzothiophene group, a benzothienodibenzothiophene group, etc.),

[0393] the π electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group may be a T4 group, a cyclic group in which two or more T4 groups are condensed with each other, a cyclic group in which at least one T4 group and at least one T1 group are condensed with each other, a cyclic group in which at least one T4 group and at least one T3 group are condensed with each other, or a cyclic group in which at least one T4 group, at least one T1 group, and at least one T3 group are condensed with one another (for example, a pyrazole group, an imidazole group, a triazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, a benzopyrazole group, a benzimidazole group, a benzoxazole group, a benzoisoxazole group, a benzothiazole group, a benzoisothiazole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a quinoxaline group, a benzoquinoxaline group, a quinazoline group, a benzoquinazoline group, a phenanthroline group, a cinnoline group, a phthalazine group, a naphthyridine group, an imidazopyridine group, an imidazopyrimidine group, an imidazotriazine group, an imidazopyrazine group, an imidazopyridazine group, an azacarbazole group, an azafluorene group, an azadibenzosilole group, an azadibenzothiophene group, an azadibenzofuran group, etc.),

[0394] wherein the T1 group may be a cyclopropane group, a cyclobutane group, a cyclopentane group, a cyclohexane group, a cycloheptane group, a cyclooctane group, a cyclobutene group, a cyclopentene group, a cyclopentadiene group, a cyclohexene group, a cyclohexadiene group, a cycloheptene group, an adamantane group, a norbornane (or a bicyclo[2.2.1]heptane) group, a norbornene group, a bicyclo[1.1.1]pentane group, a bicyclo[2.1.1]hexane group, a bicyclo[2.2.2]octane group, or a benzene group,

[0395] the T2 group may be a furan group, a thiophene group, a 1H-pyrrole group, a silole group, a borole group, a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an azasilole group, an azaborole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a tetrazine group,

[0396] the T3 group may be a furan group, a thiophene group, a 1H-pyrrole group, a silole group, or a borole group, and

[0397] the T4 group may be a 2H-pyrrole group, a 3H-pyrrole group, an imidazole group, a pyrazole group, a triazole group, a tetrazole group, an oxazole group, an isoxazole group, an oxadiazole group, a thiazole group, an isothiazole group, a thiadiazole group, an azasilole group, an azaborole group, a pyridine group, a pyrimidine group, a pyrazine group, a pyridazine group, a triazine group, or a tetrazine group.

[0398] The terms “cyclic group”, “C.sub.3-C.sub.60 carbocyclic group”, “C.sub.1-C.sub.60 heterocyclic group”, “T1 electron-rich C.sub.3-C.sub.60 cyclic group”, or “T1 electron-deficient nitrogen-containing C.sub.1-C.sub.60 cyclic group” as used herein may each be a group condensed to any cyclic group, a monovalent group, or a polyvalent group (for example, a divalent group, a trivalent group, a tetravalent group, etc.) according to the structure of a formula for which the corresponding term is used. For example, a “benzene group” may be a benzo group, a phenyl group, a phenylene group, or the like, which may be readily understood by one of ordinary skill in the art according to the structure of a formula including the “benzene group.”

[0399] Examples of the monovalent C.sub.3-C.sub.60 carbocyclic group and the monovalent C.sub.1-C.sub.60 heterocyclic group may include a C.sub.3-C.sub.60 cycloalkyl group, a C.sub.1-C.sub.10 heterocycloalkyl group, a C.sub.3-C.sub.10 cycloalkenyl group, a C.sub.1-C.sub.10 heterocycloalkenyl group, a C.sub.6-C.sub.60 aryl group, a C.sub.1-C.sub.60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group. Examples of the divalent C.sub.3-C.sub.60 carbocyclic group and the divalent C.sub.1-C.sub.60 heterocyclic group may include a C.sub.3-C.sub.10 cycloalkylene group, a C.sub.1-C.sub.10 heterocycloalkylene group, a C.sub.3-C.sub.10 cycloalkenylene group, a C.sub.1-C.sub.10 heterocycloalkenylene group, a C.sub.6-C.sub.60 arylene group, a C.sub.1-C.sub.60 heteroarylene group, a divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group.

[0400] The term “C.sub.1-C.sub.60 alkyl group” as used herein may be a linear or branched aliphatic hydrocarbon monovalent group that has one to sixty carbon atoms, and examples thereof may include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, a sec-butyl group, an isobutyl group, a tert-butyl group, an n-pentyl group, a tert-pentyl group, a neopentyl group, an isopentyl group, a sec-pentyl group, a 3-pentyl group, a sec-isopentyl group, an n-hexyl group, an isohexyl group, a sec-hexyl group, a tert-hexyl group, an n-heptyl group, an isoheptyl group, a sec-heptyl group, a tert-heptyl group, an n-octyl group, an isooctyl group, a sec-octyl group, a tert-octyl group, an n-nonyl group, an isononyl group, a sec-nonyl group, a tert-nonyl group, an n-decyl group, an isodecyl group, a sec-decyl group, and a tert-decyl group. The term “C.sub.1-C.sub.60 alkylene group” as used herein may be a divalent group having a same structure as the C.sub.1-C.sub.60 alkyl group.

[0401] The term “C.sub.2-C.sub.60 alkenyl group” as used herein may be a monovalent hydrocarbon group having at least one carbon-carbon double bond in the middle or at a terminus of the C.sub.2-C.sub.60 alkyl group, and examples thereof may include an ethenyl group, a propenyl group, and a butenyl group. The term “C.sub.2-C.sub.60 alkenylene group” as used herein may be a divalent group having a same structure as the C.sub.2-C.sub.60 alkenyl group.

[0402] The term “C.sub.2-C.sub.60 alkynyl group” as used herein may be a monovalent hydrocarbon group having at least one carbon-carbon triple bond in the middle or at a terminus of the C.sub.2-C.sub.60 alkyl group, and examples thereof may include an ethynyl group and a propynyl group. The term “C.sub.2-C.sub.60 alkynylene group” as used herein may be a divalent group having a same structure as the C.sub.2-C.sub.60 alkynyl group.

[0403] The term “C.sub.1-C.sub.60 alkoxy group” as used herein may be a monovalent group represented by —O(A.sub.101) (wherein A.sub.101 may be a C.sub.1-C.sub.60 alkyl group), and examples thereof may include a methoxy group, an ethoxy group, and an isopropyloxy group.

[0404] The term “C.sub.3-C.sub.10 cycloalkyl group” as used herein may be a monovalent saturated hydrocarbon cyclic group having 3 to 10 carbon atoms, and examples thereof may include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group, an adamantanyl group, a norbornanyl group (or bicyclo[2.2.1]heptyl group), a bicyclo[1.1.1]pentyl group, a bicyclo[2.1.1]hexyl group, and a bicyclo[2.2.2]octyl group. The term “C.sub.3-C.sub.10 cycloalkylene group” as used herein may be a divalent group having a same structure as the C.sub.3-C.sub.10 cycloalkyl group.

[0405] The term “C.sub.1-C.sub.10 heterocycloalkyl group” as used herein may be a monovalent cyclic group of 1 to 10 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms, and examples thereof may include a 1,2,3,4-oxatriazolidinyl group, a tetrahydrofuranyl group, and a tetrahydrothiophenyl group. The term “C.sub.1-C.sub.10 heterocycloalkylene group” as used herein may be a divalent group having a same structure as the C.sub.1-C.sub.10 heterocycloalkyl group.

[0406] The term “C.sub.3-C.sub.10 cycloalkenyl group” as used herein may be a monovalent cyclic group that has three to ten carbon atoms and at least one carbon-carbon double bond in the ring thereof and no aromaticity, and examples thereof may include a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. The term “C.sub.3-C.sub.10 cycloalkenylene group” as used herein may be a divalent group having a same structure as the C.sub.3-C.sub.10 cycloalkenyl group.

[0407] The term “C.sub.1-C.sub.10 heterocycloalkenyl group” as used herein may be a monovalent cyclic group of 1 to 10 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms, and having at least one carbon-carbon double bond in the cyclic structure thereof. Examples of the C.sub.1-C.sub.10 heterocycloalkenyl group may include a 4,5-dihydro-1,2,3,4-oxatriazolyl group, a 2,3-dihydrofuranyl group, and a 2,3-dihydrothiophenyl group. The term “C.sub.1-C.sub.10 heterocycloalkenylene group” as used herein may be a divalent group having a same structure as the C.sub.1-C.sub.10 heterocycloalkenyl group.

[0408] The term “C.sub.6-C.sub.60 aryl group” as used herein may be a monovalent group having a carbocyclic aromatic system of 6 to 60 carbon atoms, and the term “C.sub.6-C.sub.60 arylene group” as used herein may be a divalent group having a carbocyclic aromatic system of 6 to 60 carbon atoms. Examples of the C.sub.6-C.sub.60 aryl group may include a phenyl group, a pentalenyl group, a naphthyl group, an azulenyl group, an indacenyl group, an acenaphthyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a perylenyl group, a pentaphenyl group, a heptalenyl group, a naphthacenyl group, a picenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, and an ovalenyl group. When the C.sub.6-C.sub.60 aryl group and the C.sub.6-C.sub.60 arylene group each include two or more rings, the respective rings may be condensed with each other.

[0409] The term “C.sub.1-C.sub.60 heteroaryl group” as used herein may be a monovalent group having a heterocyclic aromatic system of 1 to 60 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms. The term “C.sub.1-C.sub.60 heteroarylene group” as used herein may be a divalent group having a heterocyclic aromatic system of 1 to 60 carbon atoms, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms. Examples of the C.sub.1-C.sub.60 heteroaryl group may include a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, a benzoquinolinyl group, an isoquinolinyl group, a benzoisoquinolinyl group, a quinoxalinyl group, a benzoquinoxalinyl group, a quinazolinyl group, a benzoquinazolinyl group, a cinnolinyl group, a phenanthrolinyl group, a phthalazinyl group, and a naphthyridinyl group. When the C.sub.1-C.sub.60 heteroaryl group and the C.sub.1-C.sub.60 heteroarylene group each include two or more rings, the respective rings may be condensed with each other.

[0410] The term “monovalent non-aromatic condensed polycyclic group” as used herein may be a monovalent group (for example, having 8 to 60 carbon atoms) having two or more rings condensed to each other, only carbon atoms as ring-forming atoms, and non-aromaticity in its entire molecular structure. Examples of the monovalent non-aromatic condensed polycyclic group may include an indenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, an indenophenanthrenyl group, and an indeno anthracenyl group. The term “divalent non-aromatic condensed polycyclic group” as used herein may be a divalent group having a same structure as the monovalent non-aromatic condensed polycyclic group described above.

[0411] The term “monovalent non-aromatic condensed heteropolycyclic group” as used herein may be a monovalent group (for example, having 1 to 60 carbon atoms) having two or more rings condensed to each other, further including, in addition to carbon atoms, at least one heteroatom, as ring-forming atoms, and having non-aromaticity in its entire molecular structure. Examples of the monovalent non-aromatic condensed heteropolycyclic group may include a pyrrolyl group, a thiophenyl group, a furanyl group, an indolyl group, a benzoindolyl group, a naphtho indolyl group, an isoindolyl group, a benzoisoindolyl group, a naphthoisoindolyl group, a benzosilolyl group, a benzothiophenyl group, a benzofuranyl group, a carbazolyl group, a dibenzosilolyl group, a dibenzothiophenyl group, a dibenzofuranyl group, an azacarbazolyl group, an azafluorenyl group, an azadibenzosilolyl group, an azadibenzothiophenyl group, an azadibenzofuranyl group, a pyrazolyl group, an imidazolyl group, a triazolyl group, a tetrazolyl group, an oxazolyl group, an isoxazolyl group, a thiazolyl group, an isothiazolyl group, an oxadiazolyl group, a thiadiazolyl group, a benzopyrazolyl group, a benzimidazolyl group, a benzoxazolyl group, a benzothiazolyl group, a benzoxadiazolyl group, a benzothiadiazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, an imidazotriazinyl group, an imidazopyrazinyl group, an imidazopyridazinyl group, an indenocarbazolyl group, an indolocarbazolyl group, a benzofurocarbazolyl group, a benzothienocarbazolyl group, a benzosilolocarbazolyl group, a benzoindolocarbazolyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a benzonaphthosilolyl group, a benzofurodibenzofuranyl group, a benzofurodibenzothiophenyl group, and a benzothienodibenzothiophenyl group. The term “divalent non-aromatic condensed heteropolycyclic group” as used herein may be a divalent group having a same structure as the monovalent non-aromatic condensed heteropolycyclic group described above.

[0412] The term “C.sub.6-C.sub.60 aryloxy group” as used herein may be represented by —O(A.sub.102) (wherein A.sub.102 may be a C.sub.6-C.sub.60 aryl group), and the term “C.sub.6-C.sub.60 arylthio group” as used herein may be represented by —S(A.sub.103) (wherein A.sub.103 may be a C.sub.6-C.sub.60 aryl group).

[0413] The term “R.sub.10a” as used herein may be:

[0414] deuterium (-D), —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, or a nitro group;

[0415] a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, or a C.sub.60 alkoxy group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.11)(Q.sub.12)(Q.sub.13), —N(Q.sub.11)(Q.sub.12), —B(Q.sub.11)(Q.sub.12), —C(═O)(Q.sub.11), —S(═O).sub.2(Q.sub.11), —P(═O)(Q.sub.11)(Q.sub.12), or any combination thereof;

[0416] a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, or a C.sub.6-C.sub.60 arylthio group, each unsubstituted or substituted with deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, a C.sub.1-C.sub.60 alkyl group, a C.sub.2-C.sub.60 alkenyl group, a C.sub.2-C.sub.60 alkynyl group, a C.sub.1-C.sub.60 alkoxy group, a C.sub.3-C.sub.60 carbocyclic group, a C.sub.1-C.sub.60 heterocyclic group, a C.sub.6-C.sub.60 aryloxy group, a C.sub.6-C.sub.60 arylthio group, —Si(Q.sub.21)(Q.sub.22)(Q.sub.23), —N(Q.sub.21)(Q.sub.22), —B(Q.sub.21)(Q.sub.22), —C(—O)(Q.sub.21), —S(—O).sub.2(Q.sub.21), —P(═O)(Q.sub.21)(Q.sub.22), or any combination thereof; or

[0417] —Si(Q.sub.31)(Q.sub.32)(Q.sub.33), —N(Q.sub.31)(Q.sub.32), —B(Q.sub.31)(Q.sub.32), —C(—O)(Q.sub.31), —S(—O).sub.2(Q.sub.31), or —P(═O)(Q.sub.31)(Q.sub.32).

[0418] The groups Q.sub.1 to Q.sub.3, Q.sub.11 to Q.sub.13, Q.sub.21 to Q.sub.23 and Q.sub.31 to Q.sub.33 as used herein may each independently be: hydrogen; deuterium; —F; —Cl; —Br; —I; a hydroxyl group; a cyano group; a nitro group; C.sub.1-C.sub.60 alkyl group; C.sub.2-C.sub.60 alkenyl group; C.sub.2-C.sub.60 alkynyl group; C.sub.1-C.sub.60 alkoxy group; or a C.sub.3-C.sub.60 carbocyclic group or a C.sub.1-C.sub.60 heterocyclic group, each unsubstituted or substituted with deuterium, —F, a cyano group, a C.sub.1-C.sub.60 alkyl group, a alkoxy group, a phenyl group, a biphenyl group, or any combination thereof.

[0419] The term “heteroatom” as used herein may be any atom other than a carbon atom or a hydrogen atom. Examples of the heteroatom may include O, S, N, P, Si, B, Ge, Se, or any combinations thereof.

[0420] The term “Ph” as used herein refers to a phenyl group, the term “Me” as used herein refers to a methyl group, the term “Et” as used herein refers to an ethyl group, the terms “ter-Bu” or “But” as used herein each refer to a tert-butyl group, and the term “OMe” as used herein refers to a methoxy group.

[0421] The term “biphenyl group” as used herein may be “a phenyl group substituted with a phenyl group.” For example, the “biphenyl group” may be a substituted phenyl group having a C.sub.6-C.sub.60 aryl group as a substituent.

[0422] The term “terphenyl group” as used herein may be “a phenyl group substituted with a biphenyl group”. For example, the “terphenyl group” may be a substituted phenyl group having, as a substituent, a C.sub.6-C.sub.60 aryl group substituted with a C.sub.6-C.sub.60 aryl group.

[0423] The symbols *, *′, and *″ as used herein, unless defined otherwise, each refer to a binding site to a neighboring atom in a corresponding formula or moiety.

[0424] Hereinafter, compounds according to embodiments and light-emitting devices according to embodiments will be described in detail with reference to the Synthesis Examples and Examples. The wording “B was used instead of A” used in describing the Synthesis Examples means that an identical molar equivalent of B was used in place of A.

EXAMPLES

Synthesis Example 1: Synthesis of Compound 1

[0425] ##STR00129## ##STR00130## ##STR00131##

Synthesis of Intermediate 1-2

[0426] Intermediate 1-1 (1 eq) was dissolved in methylene chloride, and N-bromosuccinimide (1 eq) was added dropwise thereto. After stirring the resultant mixture at room temperature for an hour, a solvent was removed therefrom under reduced pressure, and an organic layer was extracted using methylene chloride and distilled water. The extracted organic layer was washed with a saturated aqueous sodium chloride solution and dried by using sodium sulfate. A residue obtained by removing the solvent therefrom was separated by column chromatography to obtain a target compound at a yield of 95%.

Synthesis of Intermediate 1-3

[0427] Intermediate 1-2 (1 eq) was dissolved in tetrahydrofuran, and N-butyllithium (1.1 eq, 2.5M in hexane) was added dropwise thereto at −78° C. After stirring the resultant mixture at −78° C. for one hour, trimethylborate (1.1 eq) was added dropwise thereto, and the resultant mixture was stirred for 12 hours. The reaction was completed after 2M of hydrochloric acid was added thereto and stirred for 30 minutes, and an organic layer was extracted using methylene chloride and distilled water. The extracted organic layer was dried by using magnesium sulfate. A residue obtained by removing the solvent therefrom was recrystallized by using hexane to obtain a target compound at a yield of 80%.

Synthesis of Intermediate 1-4

[0428] Intermediate 1-3 (1.5 eq), 2,4-di-tert-butyl-6-chloro-1,3,5-triazine (1.0 eq), Pd(OAc).sub.3 (0.2 eq), XPhos (0.2 eq), and cesium carbonate (2.0 eq) were dissolved in 1,4-dioxane:distilled water (volume ratio of 3:1) and stirred for 12 hours at 100° C. After completion of the reaction, a solvent was removed therefrom under reduced pressure, and an organic layer was extracted with methylene chloride and distilled water. The extracted organic layer was dried by using magnesium sulfate. A residue obtained by removing the solvent therefrom was separated by column chromatography to obtain a target compound at a yield of 85%.

Synthesis of Intermediate 1-5

[0429] Intermediate 1-4 (1.0 eq) was dissolved in methylene chloride, and 1M BBr.sub.3 (1.2 eq) was slowly added dropwise thereto at 0° C. The resultant mixture was stirred at room temperature for an hour, neutralized by using NaOH aqueous solution, and an organic layer was extracted using methylene chloride and distilled water. The extracted organic layer was dried by using magnesium sulfate. A residue obtained by removing the solvent therefrom was separated by column chromatography to obtain a target compound at a yield of 70%.

Synthesis of Intermediate 1-6

[0430] Intermediate 1-5 (1.0 eq), 1-(3-bromophenyl)benzimidazole (1.2 eq), CuI (0.01 eq), K.sub.2CO.sub.3 (2.0 eq), and L-proline (0.02 eq) were dissolved in DMSO (0.1M), and the resultant mixture was stirred at 130° C. for 24 hours. The reaction mixture was cooled at room temperature, and an extraction process was performed thereon three times by using dichloromethane and water to obtain an organic layer. The obtained organic layer was dried using magnesium sulfate and concentrated, and column chromatography was used to obtain a target compound at a yield of 65%.

Synthesis of Intermediate 1-7

[0431] Intermediate 1-6 (1.0 eq) and iodomethane (5.0 eq) were dissolved in THF (1.0 M), and stirred at a temperature of 70° C. for 12 hours. The reaction mixture was cooled at room temperature, and an extraction process was performed thereon three times by using dichloromethane and water to obtain an organic layer. The obtained organic layer was dried using magnesium sulfate and concentrated, and column chromatography was used to obtain a target compound at a yield of 74%.

Synthesis of Compound 1

[0432] Intermediate 1-7 (1.0 eq), dichloro(1,5-cyclooctadiene)platinum(II) (1.1 eq), and sodium acetate (2.0 eq) were dissolved in dioxane (0.1 M), and stirred at 120° C. for 72 hours. The reaction mixture was cooled at room temperature, and subjected to an extraction process three times using water to obtain an organic layer. The obtained organic layer was dried using magnesium sulfate and concentrated, and column chromatography was used to obtain Compound 1 at a yield of 21%.

Synthesis Example 2: Synthesis of Compound 8

[0433] ##STR00132## ##STR00133## ##STR00134##

Synthesis of Intermediate 8-2

[0434] A target compound was obtained at a yield of 90% in the same manner as used to prepare Intermediate 1-2 of Synthesis Example 1, except that Intermediate 8-1 was used instead of Intermediate 1-1.

Synthesis of Intermediate 8-3

[0435] A target compound was obtained at a yield of 70% in the same manner as used to prepare Intermediate 1-3 of Synthesis Example 1, except that Intermediate 8-2 was used instead of Intermediate 1-2.

Synthesis of Intermediate 8-4

[0436] A target compound was obtained at a yield of 66% in the same manner as used to prepare Intermediate 1-4 of Synthesis Example 1, except that Intermediate 8-3 was used instead of Intermediate 1-3.

Synthesis of Intermediate 8-5

[0437] A target compound was obtained at a yield of 72% in the same manner as used to prepare Intermediate 1-5 of Synthesis Example 1, except that Intermediate 8-4 was used instead of Intermediate 1-4.

Synthesis of Intermediate 8-6

[0438] A target compound was obtained at a yield of 75% in the same manner as used to prepare Intermediate 1-6 of Synthesis Example 1, except that Intermediate 8-5 was used instead of Intermediate 1-5 and 1-(3-bromo-5-(tert-butyl)phenyl)-1H-benzo[d]imidazole was used instead of 1-(3-bromophenyl)benzimidazole.

Synthesis of Intermediate 8-7

[0439] A target compound was obtained at a yield of 88% in the same manner as used to prepare Intermediate 1-7 of Synthesis Example 1, except that Intermediate 8-6 was used instead of Intermediate 1-6.

Synthesis of Compound 8

[0440] A target compound was obtained at a yield of 24% in the same manner as used to prepare Compound 1 of Synthesis Example 1, except that Intermediate 8-7 was used instead of Intermediate 1-7.

Synthesis Example 3: Synthesis of Compound 28

[0441] ##STR00135## ##STR00136## ##STR00137##

Synthesis of Intermediate 28-2

[0442] A target compound was obtained at a yield of 90% in the same manner as used to prepare Intermediate 1-2 of Synthesis Example 1, except that Intermediate 28-1 was used instead of Intermediate 1-1.

Synthesis of Intermediate 28-3

[0443] A target compound was obtained at a yield of 70% in the same manner as used to prepare Intermediate 1-3 of Synthesis Example 1, except that Intermediate 28-2 was used instead of Intermediate 1-2.

Synthesis of Intermediate 28-4

[0444] A target compound was obtained at a yield of 67% in the same manner as used to prepare Intermediate 1-4 of Synthesis Example 1, except that Intermediate 28-3 was used instead of Intermediate 1-3 and 2-chloro-4,6-diphenyl-1,3,5-triazine was used instead of 2,4-di-tert-butyl-6-chloro-1,3,5-triazine.

Synthesis of Intermediate 28-5

[0445] A target compound was obtained at a yield of 71% in the same manner as used to prepare Intermediate 1-5 of Synthesis Example 1, except that Intermediate 28-4 was used instead of Intermediate 1-4.

Synthesis of Intermediate 28-6

[0446] A target compound was obtained at a yield of 62% in the same manner as used to prepare Intermediate 1-6 of Synthesis Example 1, except that Intermediate 28-5 was used instead of Intermediate 1-5 and 1-(3-bromo-5-(tert-butyl)phenyl)-1H-imidazole was used instead of 1-(3-bromophenyl)benzimidazole.

Synthesis of Intermediate 28-7

[0447] A target compound was obtained at a yield of 95% in the same manner as used to prepare Intermediate 1-7 of Synthesis Example 1, except that Intermediate 28-6 was used instead of Intermediate 1-6.

Synthesis of Compound 28

[0448] A target compound was obtained at a yield of 14% in the same manner as used to prepare Compound 1 of Synthesis Example 1, except that Intermediate 28-7 was used instead of Intermediate 1-7.

Synthesis Example 4: Synthesis of Compound 36

[0449] ##STR00138## ##STR00139## ##STR00140##

Synthesis of Intermediate 36-4

[0450] A target compound was obtained at a yield of 57% in the same manner as used to prepare Intermediate 1-4 of Synthesis Example 1, except that 2-chloro-4,6-diphenyl-1,3,5-triazine was used instead of 2,4-di-tert-butyl-6-chloro-1,3,5-triazine in Intermediate 1-3.

Synthesis of Intermediate 36-5

[0451] A target compound was obtained at a yield of 69% in the same manner as used to prepare Intermediate 1-5 of Synthesis Example 1, except that Intermediate 36-4 was used instead of Intermediate 1-4.

Synthesis of Intermediate 36-6

[0452] A target compound was obtained at a yield of 88% in the same manner as used to prepare Intermediate 1-6 of Synthesis Example 1, except that Intermediate 36-5 was used instead of Intermediate 1-5 and 1,3-dibromobenzene was used instead of 1-(3-bromophenyl)benzimidazole.

Synthesis of Intermediate 36-7

[0453] Intermediate 36-6 (1.0 eq), N1-([1,1′:3′,1″-terphenyl]-2′-yl-2,2″,3,3″,4,4″,5,5″,6,6″-D.sub.10)benzene-1,2-diamine (1.0 eq), SPhos (0.07 eq), Pd.sub.2(dba).sub.3 (0.05 eq), and sodium t-butoxide (2.0 eq) were suspended in toluene, heated to 100° C., and stirred for 4 hours. After completion of the reaction, a solvent was removed therefrom under reduced pressure, and extracted with methylene chloride and distilled water. The extracted organic layer was washed with a saturated aqueous sodium chloride solution and dried by using magnesium sulfate. A residue obtained by removing the solvent therefrom was separated by column chromatography to obtain a target compound at a yield of 80%.

Synthesis of Intermediate 36-8

[0454] After dissolving Intermediate 36-7 (1.0 eq), triethylorthoformate (50 eq), and HCl (25 eq), the resultant mixture was stirred for 12 hours at 80° C. After cooling the reaction mixture to room temperature, triethylorthoformate was removed therefrom and an extraction process was performed thereon three times by using ethyl acetate and water to obtain an organic layer. The obtained organic layer was dried using magnesium sulfate and concentrated, and column chromatography was used to obtain a target compound at a yield of 88%.

Synthesis of Intermediate 36-9

[0455] Intermediate 36-8 (1.0 eq) was dissolved in methanol (0.1 M), distilled water (0.025 M) was slowly added thereto and stirred, and NH.sub.4PF.sub.6 (1.2 eq) was added thereto and stirred for 12 hours at room temperature. The produced solid was filtered, washed three times with diethyl ether, and dried to obtain a target compound at a yield of 92%.

Synthesis of Compound 36

[0456] Compound 36 was obtained at a yield of 21% in the same manner as used to prepare Compound 1 of Synthesis Example 1, except that Intermediate 36-9 was used instead of Intermediate 1-7.

Synthesis Example 5: Synthesis of Compound 68

[0457] ##STR00141## ##STR00142## ##STR00143##

Synthesis of Intermediate 68-2

[0458] A target compound was obtained at a yield of 90% in the same manner as used to prepare Intermediate 1-2 of Synthesis Example 1, except that Intermediate 68-1 was used instead of Intermediate 1-1.

Synthesis of Intermediate 68-3

[0459] A target compound was obtained at a yield of 70% in the same manner as used to prepare Intermediate 1-3 of Synthesis Example 1, except that Intermediate 68-2 was used instead of Intermediate 1-2.

Synthesis of Intermediate 68-4

[0460] A target compound was obtained at a yield of 71% in the same manner as used to prepare Intermediate 1-4 of Synthesis Example 1, except that Intermediate 68-3 was used instead of Intermediate 1-3 and 2-chloro-4,6-di-p-tolyl-1,3,5-triazine was used instead of 2,4-di-tert-butyl-6-chloro-1,3,5-triazine.

Synthesis of Intermediate 68-5

[0461] A target compound was obtained at a yield of 66% in the same manner as used to prepare Intermediate 1-5 of Synthesis Example 1, except that Intermediate 68-4 was used instead of Intermediate 1-4.

Synthesis of Intermediate 68-6

[0462] A target compound was obtained at a yield of 76% in the same manner as used to prepare Intermediate 1-6 of Synthesis Example 1, except that Intermediate 68-5 was used instead of Intermediate 1-5 and 1-(3-1-(3-bromo-5-(tert-butyl)phenyl)-1H-benzo[d]imidazole was used instead of 1-(3-bromophenyl)benzimidazole.

Synthesis of Intermediate 68-7

[0463] A target compound was obtained at a yield of 92% in the same manner as used to prepare Intermediate 1-7 of Synthesis Example 1, except that Intermediate 68-6 was used instead of Intermediate 1-6.

Synthesis of Compound 68

[0464] Compound 68 was obtained at a yield of 25% in the same manner as used to prepare Compound 1 of Synthesis Example 1, except that Intermediate 68-7 was used instead of Intermediate 1-7.

Synthesis Example 6: Synthesis of Compound 78

[0465] ##STR00144## ##STR00145## ##STR00146##

Synthesis of Intermediate 78-2

[0466] A target compound was obtained at a yield of 90% in the same manner as used to prepare Intermediate 1-2 of Synthesis Example 1, except that Intermediate 78-1 was used instead of Intermediate 1-1.

Synthesis of Intermediate 78-3

[0467] A target compound was obtained at a yield of 70% in the same manner as used to prepare Intermediate 1-3 of Synthesis Example 1, except that Intermediate 78-2 was used instead of Intermediate 1-2.

Synthesis of Intermediate 78-4

[0468] A target compound was obtained at a yield of 69% in the same manner as used to prepare Intermediate 1-4 of Synthesis Example 1, except that Intermediate 78-3 was used instead of Intermediate 1-3 and 2,4-bis(4-(tert-butyl)phenyl)-6-chloro-1,3,5-triazine was used instead of 2,4-di-tert-butyl-6-chloro-1,3,5-triazine.

Synthesis of Intermediate 78-5

[0469] A target compound was obtained at a yield of 75% in the same manner as used to prepare Intermediate 1-5 of Synthesis Example 1, except that Intermediate 78-4 was used instead of Intermediate 1-4.

Synthesis of Intermediate 78-6

[0470] A target compound was obtained at a yield of 80% in the same manner as used to prepare Intermediate 1-6 of Synthesis Example 1, except that Intermediate 78-5 was used instead of Intermediate 1-5 and 1-(3-bromo-5-(tert-butyl)phenyl)-1H-benzo[d]imidazole was used instead of 1-(3-bromophenyl)benzimidazole.

Synthesis of Intermediate 78-7

[0471] A target compound was obtained at a yield of 88% in the same manner as used to prepare Intermediate 1-7 of Synthesis Example 1, except that Intermediate 78-6 was used instead of Intermediate 1-6.

Synthesis of Compound 78

[0472] Compound 1 was obtained at a yield of 20% in the same manner as used to prepare Compound 1 of Synthesis Example 1, except that Intermediate 78-7 was used instead of Intermediate 1-7.

[0473] .sup.1H NMR and MS/FAB of the compounds synthesized according to Synthesis Examples 1 to 6 are shown in Table 1. Synthesis methods for other compounds than the compounds shown in Table 1 may be readily recognized by those skilled in the technical field by referring to the synthesis paths and source materials described above.

TABLE-US-00001 TABLE 1 MS/FAB Compound H NMR (δ) Calc. Found 1 8.65 (d, 1H), 8.56 (d, 1H), 8.19 (d, 1H), 8.15 (t, 1H), 850.89 850.27 8.02 (d, 1H), 7.85 (s, 1H), 7.64-7.50 (m, 3H), 7.36-7.10 (m, 7H), 3.87 (s, 3H), 1.35 (s, 18H) 8 8.60 (d, 1H), 8.55 (d, 1H), 8.19 (d, 1H), 7.85 (s, 1H), 963.11 962.40 7.64-7.40 (m, 6H), 7.28-7.20 (m, 3H), 7.04 (s, 1H), 3.88 (s, 3H), 1.34 (s, 9H), 1.30 (s, 9H), 1.34 (s, 18H) 28 8.55 (d, 1H), 8.36 (d, 4H), 8.19 (d, 1H), 7.85 (s, 1H), 953.03 952.32 7.58-7.50 (m, 9H), 7.41 (d, 2H), 7.31 (d, 1H), 7.27 (d, 1H), 7.20 (t, 1H), 7.04 (s, 1H), 3.71 (s, 3H), 1.35 (s, 9H), 1.32 (s, 9H) 36 8.65 (d, 1H), 8.56 (d, 2H), 8.36 (d, 4H), 8.19-8.15 (m, 1115.20 1114.35 2H), 8.02 (d, 1H), 7.87-7.85 (m, 3H), 7.73 (t, 1H), 7.58- 7.50 (m, 8H), 7.36-7.20 (m, 5H), 7.10 (d, 2H) 68 8.60-8.55 (m, 6H), 8.19 (d, 1H), 7.85 (s, 1H), 7.64 (d, 1131.14 1130.36 1H), 7.58 (d, 1H), 7.51-7.40 (m, 8H), 7.28-7.20 (m, 3H), 7.04 (s, 1H), 3.87 (s, 3H), 2.34 (s, 6H), 1.32 (s, 18H) 78 8.60 (d, 1H), 8.55 (d, 1H), 8.49 (d, 4H), 8.19 (d, 1H), 1115.30 1114.46 7.85 (s, 1H), 7.64 (d, 1H), 7.58-7.50 (m, 3H), 7.41-7.38 (m, 6H), 7.28-7.27 (m, 2H), 7.20 (d, 1H), 7.04 (s, 1H), 3.87 (s, 3H), 1.33 (s, 18H), 1.30 (s, 18H)

Example 1

[0474] As an anode, a 15 Ωcm.sup.2 (1,200 Å) ITO glass substrate available from Corning Inc. was cut to a size of 50 mm×50 mm×0.7 mm, sonicated using isopropyl alcohol and pure water for 5 minutes each, and cleaned by irradiation of ultraviolet rays and exposure of ozone thereto for 30 minutes. The resultant glass substrate was loaded onto a vacuum deposition apparatus.

[0475] 2-TNATA was vacuum-deposited on the ITO anode formed on the ITO glass substrate to form a hole injection layer having a thickness of 600 Å, and NPB was vacuum-deposited on the hole injection layer to form a hole transport layer having a thickness of 300 Å.

[0476] Compound 1 (10 wt %) as a dopant and H125 and H126 as a host were co-deposited on the hole transport layer to a weight ratio of 5:5 to form an emission layer having a thickness of 300 Å.

[0477] H125 was vacuum-deposited on the emission layer to form a hole blocking layer having a thickness of 50 Å. Alq.sub.3 was deposited on the hole blocking layer to form an electron transport layer having a thickness of 300 Å, LiF which is a halogenated alkali metal was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å, and Al was vacuum-deposited on the electron injection layer to form a cathode having a thickness of 3,000 Å to form a LiF/Al electrode, thereby completing the manufacture of an light-emitting device.

##STR00147##

Examples 2 to 6 and Comparative Examples 1 to 4

[0478] Light-emitting devices were manufactured in a same manner as in Example 1, except that compounds shown in Table 2 were used as a dopant instead of Compound 1 in forming an emission layer.

Evaluation Example 1

[0479] To evaluate the characteristics of the light-emitting devices manufactured according to Examples 1 to 6 and Comparative Examples 1 to 4, the driving voltage, luminescence efficiency, device lifespan, and full width at half maximum (FWHM) of the light-emitting devices were measured at a luminance of 1,000 cd/m.sup.2. The driving voltage of the light-emitting devices was measured using a source meter (Keithley Instrument Inc., 2400 series). The quantum efficiency of the light-emitting device was measured by using a quantum efficiency measurement device C9920-2-12 manufactured by Hamamatsu Photonics Inc. The device lifespan indicates a measure of the time taken for the luminance to reach 90% of the maximum luminance of 1000cd/m.sup.2. FWHM shows a measure of the wavelength width of a point corresponding to ½ of the maximum emission intensity in the photoluminescence (PL) spectrum of the light-emitting device. Table 2 shows the evaluation results of the characteristics of the light-emitting devices.

TABLE-US-00002 TABLE 2 Maximum Driving Luminescence emission Device lifespan Voltage Efficiency wavelength (T.sub.90, h) FWHM Dopant (V) (cd/A) (nm) (at 1000 cd/m.sup.2) (nm) Example 1  1 3.8 25.0 460 102 21 Example 2  8 3.9 26.2 459 110 20 Example 3 28 3.8 22.4 460 90 21 Example 4 36 4.0 26.4 461 80 23 Example 5 68 3.9 25.8 460 65 22 Example 6 78 3.8 24.1 462 65 23 Comparative CE1 5.2 20.1 471 50 42 Example 1 Comparative CE2 5.3 19.0 475 40 41 Example 2 Comparative CE3 5.0 17.1 465 42 40 Example 3 Comparative CE4 5.1 18.1 469 20 41 Example 4 [00148]CE1 [00149]CE2 [00150]CE3 [00151]CE4

[0480] From Table 2, it can be seen that the light-emitting devices of Examples 1 to 6 have lower driving voltages, excellent luminescence efficiencies, long device lifespan, and high color purity, as compared with those of the light-emitting devices of Comparative Examples 1 to 4.

[0481] Although the disclosure has been described with reference to the Synthesis Examples and the Examples, these examples are provided for illustrative purpose only, and one of ordinary skill in the art may understand that these examples may have various modifications and other examples equivalent thereto. Accordingly, the scope of the disclosure should be determined by the claims.

[0482] The organometallic compound may be used in manufacturing a light-emitting device having high efficiency and a long lifespan, and the light-emitting device may be used in manufacturing a high-quality electronic apparatus having high efficiency and a long lifespan.

[0483] Embodiments have been disclosed herein, and although terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent by one of ordinary skill in the art, features, characteristics, and/or elements described in connection with an embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of ordinary skill in the art that various changes in form and details may be made without departing from the spirit and scope of the disclosure as set forth in the claims.