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.

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.

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.

The present specification relates to an organic light emitting device comprising a first electrode, a second electrode, and one or more organic material layers provided between the first electrode and the second electrode, wherein one or more layers of the organic material layers comprise a heterocyclic compound represented by Chemical Formula 1 and a heterocyclic compound represented by Chemical Formula 2 at the same time, and a composition for an organic material layer of an organic light emitting device.

A composition for forming organic film, a display device utilizing the composition, and a method of manufacturing the display device are provided. The composition for forming an organic film includes a solvent; and a compound of Formula 1:
ArR).sub.k.  Formula 1

Provided are a compound of Formula 1; an organic electric element comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, comprising a compound of Formula 1 in the organic material layer; and an electronic device comprising the element, which has lowered driving voltage and increased luminous efficiency and life time.

A light emitting device having excellent external quantum efficiency contains an anode, a cathode, and two organic layers disposed therebetween. One layer contains a phosphorescent transition metal complex and a low molecular weight compound containing no transition metal, and the second layer contains a crosslinked body of a polymer compound (having an energy level of the lowest triplet excited state of 2.30 eV or more) containing a constitutional unit having a crosslinking group. The low molecular weight compound has formula (T-1) and the absolute value of the difference between the energy levels of the lowest triplet excited state and the lowest singlet excited state is less than 0.25 eV. ##STR00001##
n.sup.T1 represents an integer of 0 to 5, n.sup.T2 represents an integer of 1 to 10, Ar.sup.T1 represents a substituted amino group or a monovalent hetero ring group, L.sup.T1 represents an alkylene group, and Ar.sup.T2 represents a hetero ring group.