An organic electroluminescence device includes an anode, an emitting layer, and a cathode in this order. The emitting layer comprises a delayed fluorescent compound M2 and a compound M3 having at least one deuterium atom, and the compound M3 is not a compound having a partial structure represented by a formula (1C) or (2C). S.sub.1(M2) of the compound M2 and S.sub.1(M3) of the compound M3 satisfy a relationship of S.sub.1(M3)>S.sub.1(M2). In the formulae (1C) and (2C), Y.sub.41 to Y.sub.48 are each independently a N atom, CR, or a C atom bonded to another atom or the like in the compound M3, where each R is independently a H atom or a substituent, at least one of Y.sub.41 to Y.sub.48 is a N atom, and at least one of Y.sub.41 to Y.sub.48 is a C atom bonded to another atom or the like in the compound M3.

##STR00001##

A composition including a first compound represented by Formula 1 and a second compound represented by Formula 2:

##STR00001##

wherein in Formula 1, M.sub.1 is Pt, Pd, or Au, in Formula 2, M.sub.2 is Ir, L.sub.11 is a ligand represented by Formula 2-1, L.sub.12 is a ligand represented by Formula 2-2, L.sub.13 is a ligand represented by Formula 2-1 or 2-2, L.sub.11 and L.sub.12 are different from each other, n11, n12, and n13 are each independently 0, 1, 2, or 3, and a sum of n11+n12+n13 is equal to 3, and wherein the remaining substituent groups are each understood by referring to the detailed description provided herein.

Provided are an organic electroluminescent material and a device comprising the same. The organic electroluminescent material is a metal complex comprising a ligand L.sub.a having a structure of Formula 1A and a ligand L.sub.b having a structure of Formula 1B. Such new compounds each have a lower evaporation temperature, which is conducive to industrial application of the material and can reduce energy consumption in industrialization. Such metal complexes are used as a light-emitting material in an electroluminescent device. When applied to the electroluminescent device, such metal complexes can provide very excellent device performance, especially an improved device lifetime. Further provided are an organic electroluminescent device comprising the metal complex and a compound composition comprising the metal complex.

An organometallic compound represented by Formula 1 emits deep blue light. A light-emitting device including the organometallic compound, and an electronic apparatus including the light-emitting device may have excellent or suitable driving voltage, luminescence efficiency, color conversion efficiency, and/or lifespan characteristics:

##STR00001##

In Formula 1, X.sub.1 to X.sub.4 are each independently C or N, Y.sub.11 is C(Z.sub.11) or N, and Y.sub.12 is C(Z.sub.12) or N.

The present disclosure provides an organic compound, an electron transport material, and an application thereof. The organic compound has a structure as shown in Formula I. Design of molecular structure and substituents enables it to undergo tridentate coordination or tetradentate coordination with metal, and more stably and firmly combination with metal, so that it has stronger stability and longer working life when used as an electron transport material, which effectively solves a problem of rising drift voltage. The organic compound has greater rigid distortion, which can suppress an increase of intermolecular attraction and prevent it from forming a planar structure to cause excessive intermolecular attraction. The organic compound is used as an electron transport material, and can be applied to an electron transport layer and/or an electron injection layer of an OLED device, which can effectively improve luminous efficiency and working life of the device, and reduce turn-on voltage.

The present invention relates to a phenyl-derivative compound substituted with at least two electron acceptors and at least two electron donors. Formula (I) R.sup.AaR.sup.DbR.sup.ScC.sub.6 wherein a is 2, 3 or 4; b is 2, 3 or 4; c is 0, 1 or 2; a+b−c=6; R.sup.A is at each occurrence independently a group with −M-effect; R.sup.B is at each occurrence independently a group with +−M-effect; R.sup.S is as defined in claim 1. Said compound is suited for use in organic electronic devices, particularly in organic electroluminescent devices.

An organic light-emitting material contains a 6-silyl-substituted isoquinoline ligand. The organic light-emitting material is a metal complex containing a 6-silyl-substituted isoquinoline ligand and may be used as a light-emitting material in a light-emitting layer of an organic electroluminescent device. These new complexes can provide redder and saturated emission and meanwhile demonstrate a significantly improved lifetime and efficient and excellent device performance. Further disclosed are an electroluminescent device and a compound formulation including the metal complex.

Provided are a composition for an organic optoelectronic device including a first compound represented by Chemical Formula 1 and a second compound represented by Chemical Formula 2, an organic optoelectronic device including the same, and a display device. Details of Chemical Formula 1 and Chemical Formula 2 are as defined in the specification.

A compound of Formula I,

##STR00001##

is disclosed. In Formula I, M is Pd or Pt; each of X.sup.1 to X.sup.12 is C or N; each of X.sup.13 and X.sup.14 is CH, CD or N; each of Z.sup.1, Z.sup.2, and Z.sup.3 is C or N; L.sup.1 is selected from a variety of bivalent linkers; X is selected from O, S, Se, NR′, and CR″R′″; each R, R′, R.sup.1, R.sup.2, R.sup.3, R.sup.A, R.sup.B, R.sup.C, R.sup.D, and R.sup.E is hydrogen or a General Substituent; at least one of Z.sup.1, Z.sup.2, and Z.sup.3 is a carbon atom substituted with a substituent with a molecular weight of at least 16. Formulations, OLEDs, and consumer products that include Formula I are also disclosed.

Provided is an organometallic compound of Chemical Formula 1: ##STR00001## wherein, in Chemical Formula 1: X is O, S, NH, or Se; R.sub.1 is —Si(R.sub.a)(R.sub.b)(R.sub.c), where R.sub.a, R.sub.b, and R.sub.c are hydrogen, deuterium, or a substituted or unsubstituted C.sub.1-10 alkyl; R.sub.2, R.sub.3 and R.sub.4 are each independently hydrogen, deuterium, halogen, cyano, amino, a substituted or unsubstituted C.sub.1-60 alkyl, a substituted or unsubstituted C.sub.1-60 haloalkyl, a substituted or unsubstituted C.sub.1-60 alkoxy, a substituted or unsubstituted C.sub.1-60 haloalkoxy, a substituted or unsubstituted C.sub.3-60 cycloalkyl, a substituted or unsubstituted c.sub.2-60 alkenyl, a substituted or unsubstituted C.sub.6-60 aryl, a substituted or unsubstituted C.sub.6-60 aryloxy, or a substituted or unsubstituted C.sub.2-60 heterocyclic group containing one or more heteroatoms selected from the group consisting of N, O and S; a and b are each 0 and 1, or 1 and 0, respectively; and n is 1 or 2,
and an organic light emitting device including the same.