Tetradentate Pt and Pd compounds with functional groups forming macrocycles are disclosed. The compounds are useful in organic electroluminescent devices to provide improved device efficiency and the stability.

A composition including a first compound including a compound represented by Formula 1, a second compound including a compound represented by Formula 2, and a third compound including a compound represented by Formula 3, and an organic light-emitting device including the composition: ##STR00001## wherein the description of Formulae 1 to 3 are the same as described in the specification.

An organometallic compound represented by Formula 1:
M(L.sub.1).sub.n1(L.sub.2).sub.n2  Formula 1
wherein M, L.sub.1, L.sub.2, n1, and n2 are the same as described in the specification.

The invention relates to an organic molecule for optoelectronic devices. According to the invention, the organic molecule has: —a chemical moiety with a structure of formula I: and—one or two second chemical moieties with a structure of formula II: wherein R.sup.I, R.sup.II, R.sup.III, R.sup.IV, R.sup.V, R.sup.VI, R.sup.VII, R.sup.VIII, R.sup.IX, and R.sup.X are at each occurrence independently selected from the group consisting of the binding site of a single bond linking the first chemical moiety to the second moiety, hydrogen, deuterium, OPh, SPh, CF.sub.3, CN, F, Si(C.sub.1-C.sub.5-alkyl).sub.3, Si(Ph).sub.3, C.sub.1-C.sub.5-alkyl, C.sub.1-C.sub.5-alkoxy, C.sub.1-C.sub.5-thioalkoxy, C.sub.2-C.sub.5-alkenyl, C2-C5-alkynyl, C.sub.6-C.sub.18-aryl, C.sub.3-C.sub.17-heteroaryl, N(C.sub.6-C.sub.18-aryl).sub.2, N(C.sub.3-C.sub.17-heteroaryl).sub.2; N(C.sub.3-C.sub.17-heteroaryl)(C.sub.6-C.sub.18-aryl); the dashed lines “Formula III” in formula II represent the binding sites of the first chemical moiety to the second chemical moiety; Z is at each occurrence independently selected from the group consisting of a direct bond, CR.sup.3R.sup.4, C═CR.sup.3R.sup.4, C═O, C═NR.sup.3, NR.sup.3, O, SiR.sup.3R.sup.4, S, S(O) and S(O).sub.2; Ar.sup.1 is C.sub.6-C.sub.60-aryl, which is optionally substituted with one or more substituents R.sup.6; wherein either R.sup.V and R.sup.VI, or R.sup.VI and R.sup.VII represent the binding sites of a single bond linking the first chemical moiety to the second chemical moiety to form a ring.

##STR00001##

Phosphorescent complexes are designed with intramolecular H-bonding properties to prevent deprotonation of neighboring molecules.

An organic electroluminescence device includes a first electrode, a second electrode, and an emission layer between the first electrode and the second electrode, wherein the emission layer includes a compound represented by Formula 1 below. Embodiments of the present disclosure exhibit improved emission efficiency and long life characteristics: ##STR00001##

A compound of Formula Ir(L.sub.A).sub.n(L.sub.B).sub.m(L.sub.C).sub.p is provided where m and n are 1 or 2, p is 0 or 1, and m+n+p=3. Ligand L.sub.A has a structure of

##STR00001##

ligand L.sub.B has a structure of

##STR00002##

and ligand L.sub.C is a bidentate ligand. In the compound, ring A′ is a ring or is absent; each of R.sub.1 and R.sub.1′ is alkyl, heteroalkyl, cycloalkyl, heterocycloalkyl, aryl, heteroaryl, silyl, germyl, or a combination thereof; moiety C is a monocyclic ring or a fused ring system; each of Z.sup.1 and Z.sup.2 and X.sup.1 to X.sup.11 is independently C or N, except that X.sup.12 and X.sup.13 are C if ring A′ is present; each R.sup.A, R.sup.A′, R.sup.B, R.sup.C, and R.sup.D is hydrogen or one of the General Substituents; and at least one R.sup.C or R.sup.D comprises an electron withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

An aromatic compound which improves emission efficiency and an organic electroluminescence device including the same are provided. The organic electroluminescence device includes: a first electrode; a second electrode opposite to the first electrode; and a plurality of organic layers between the first electrode and the second electrode, where at least one organic layer among the plurality of organic layers includes the aromatic compound. The aromatic compound is represented by Formula 1 below. ##STR00001##

The present specification provides an organic light emitting device including a light emitting layer including a compound represented by Chemical Formula 1; and a compound represented by Chemical Formula H.

A light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and the second compound is an organic compound having a pyrimidine skeleton. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a diazine skeleton, and the second compound is an organic compound having a pyrimidine skeleton.