An organic electroluminescence device and a method of manufacturing an organic electroluminescence device, the device including a first electrode; a second electrode on the first electrode; and an emission layer between the first electrode and the second electrode, wherein the emission layer includes a first host represented by the following Formula 1, and a second host represented by one of the following Formula 2-1 to Formula 2-5: ##STR00001## ##STR00002##

The invention relates to heteroaromatic, polycyclic condensed compounds according to the formulae (i) and (ii) defined below. Said compounds are suitable for use in electronic devices.

Provided are an organic light-emitting device including a first compound, a second compound, and a third compound, and an electronic apparatus including the same. The organic light-emitting device includes a first electrode; a second electrode facing the first electrode; and an emission layer disposed between the first electrode and the second electrode, the emission layer including the first compound, the second compound, andthe third compound.

The present disclosure relates to a plurality of host materials comprising a first host compound represented by formula 1 and a second host compound represented by formula 2 and an organic electroluminescent device comprising the same. By comprising the specific combination of the compound as host materials, an organic electroluminescent device having low driving voltage, high luminous efficiency and/or long lifespan can be provided compared with a conventional organic electroluminescent device.

a compound for an organic optoelectronic device represented by a combination of Chemical Formula 1 and 2, a composition for an organic optoelectronic device including the same, an organic optoelectronic device, and a display device.

Details of Chemical Formulas 1 and 2 are as described in the specification.

A series of highly luminescent cyclometalated rhodium(III) complexes, with photoluminescence quantum yields up to 0.65 in thin films, have been designed and prepared. The strong luminescence property is realized by the judicious choice of a strong σ-donor cyclometalating ligand with lower-lying intraligand state and the ability to raise the d-d excited state. This is the first report to demonstrate the capability of rhodium(III) complexes as high efficient light-emitting materials for organic light-emitting devices. Compelling external quantum efficiencies of up to 12.2% and operational half-lifetime of over 3,000 hours have been achieved.

An organometallic compound, represented by Formula 1:

M.sub.1(Ln.sub.1).sub.n1(Ln.sub.2).sub.n2  Formula 1

wherein, Ln.sub.1 is a ligand represented by Formula 1-1, Ln.sub.2 is a ligand represented by Formula 2-1 or 2-2, n1 is 1, 2, or 3, and n2 is 0, 1, or 2,

##STR00001##

wherein CY.sub.1 is a benzoquinoline group or a benzoisoquinoline group, X.sub.31 and X.sub.32 are each independently O or S; R.sub.10, R.sub.21 to R.sub.28, R.sub.31 to R.sub.37, R.sub.41 to R.sub.44, and b10 are as defined herein; and * and *′ each indicate a binding site to M.sub.1.

A compound comprising a first ligand L.sub.A, where L.sub.A comprises a structure of Formula I,

##STR00001##

is provided. In Formula I, each of X.sup.1, X.sup.2, X.sup.3, and X.sup.4 represents CR, CRR′, NR, or N; Y is selected from a linking group; each of R, R′, R″, R.sup.1, R.sup.1′, R.sup.2, R.sup.2′, R.sup.3, R.sup.3′, R.sup.4, and R.sup.4′ is hydrogen or a substituent; each represents a single bond or a double bond; any two adjacent substituents may be joined or fused to form a ring; two adjacent ones of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are joined together to form a fused 5-membered heterocyclic ring, Ring A, while the remaining two of R.sup.1, R.sup.2, R.sup.3, and R.sup.4 cannot be joined to form an aromatic ring; and Ring A is joined to a metal M by a direct bond. Formulations, OLEDs, and consumer products comprising the compound are also provided.

Provided are an organic electroluminescent material and a device thereof. The organic electroluminescent material is a metal complex comprising a ligand L.sub.a having a structure of Formula 1. The metal complex may be used as a light-emitting material in an electroluminescent device. These new compounds may be applied to electroluminescent devices and can exhibit better performance, achieve higher device efficiency, and significantly improve the overall performance of the devices. Further provided are an electroluminescent device comprising the metal complex and a compound combination comprising the metal complex.

Heteroleptic compounds having a Formula Ir(L.sub.A).sub.m(L.sub.B).sub.3-m, having the structure of Formula I

##STR00001##

or Formula II,

##STR00002##

are described. In Formula I and Formula II, moiety B is a polycyclic fused ring structure comprising at least four rings; ring C is a 5- or 6-membered aromatic ring; moieties D and E are independently a monocyclic or polycyclic fused ring structure; Z.sup.1 and Z.sup.2 are each independently C or N; each R.sup.A, R.sup.B, R.sup.C, R.sup.D, and R.sup.E is hydrogen or a General Substituent; and when ring C is a phenyl ring, R.sup.C collectively comprises two or more C atoms. Formulations, OLEDs, and consumer products incorporating the compounds are also described.