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

##STR00001##

is provided. In Formula I, each of moiety A and moiety C is independently a 5- or 6-membered ring or a polycyclic fused ring system comprising 5- or 6-membered rings; moiety B is a 5-membered heterocyclic ring; Z.sup.1, Z.sup.2, and Z.sup.3 are C or N; m is 1 or 2; at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 has a structure of Formula II,

##STR00002##

or is a 5-membered heterocyclic ring; each of X.sup.1, X.sup.2, X.sup.3, X.sup.4, and X.sup.5 is CR or N; each of R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.A, R.sup.B, R.sup.C, and R is hydrogen or a General Substituent; at least one of R.sup.1a, R.sup.2a, R.sup.3a, R.sup.4a, R.sup.5a is cycloalkyl, alkyl, silyl, germyl, deuterated variants thereof, fluorinated variants thereof, and combinations thereof. Formulations, OLEDs, and consumer products containing the compound are also provided.

The present invention relates to iridium complexes suitable for use in organic electroluminescent devices, especially as emitters.

A metal tetradentate complex is disclosed in which an imidazole moiety is used as a linker in the ligand. The complex is useful as an emitter or other functional roles in an OLED device.

A compound having a formula: ##STR00001##
Formula I useful as emitters in OLEDs is disclosed.

An organometallic compound represented by Formula 1:
M(L.sub.1).sub.n1(L.sub.2).sub.n2(L.sub.3).sub.n3  Formula 1 wherein M, L.sub.1, L.sub.2, L.sub.3, n1, n2, and n3 are the same as described in the specification.

An organic electroluminescence device includes a first electrode, an organic layer disposed on the first electrode, and a second electrode disposed on the organic layer. The organic layer includes an organometallic compound represented by Formula 1 below. ##STR00001##
where R.sub.1 to R.sub.4, X.sub.1 to X.sub.4, Ar.sub.1 to Ar.sub.3, M, Q, m1 to m4, and n are as defined in the specification.

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, the organic layer including an emission layer. The emission layer includes at least one organometallic compound of Formula 1, and at least one selected from a second compound and a third compound, where the organometallic compound, the second compound, and the third compound are different from each other. When the emission layer comprises both the second compound and the third compound, the second compound and the third compound form an exciplex, and the organometallic compound and the second compound and/or the third compound do not form an exciplex:
M(L.sub.1).sub.n1(L.sub.2).sub.n2,  Formula 1
wherein in Formula 1, L.sub.1 is represented by Formula 2-1: ##STR00001##

The present invention relates to a platinum metal complex and an application thereof in an organic light-emitting device. The platinum metal complex is a compound having a structure of chemical formula (I). An organic light-emitting device to which the compound is applied has a relatively low driving voltage, a relatively high luminous efficiency and improved service life to a certain extent; therefore, the complex has the potential of being applied in the field of organic light-emitting devices. Also provided is an organic light-emitting device, including a cathode, an anode, and an organic layer. The organic layer is one or more of a hole injection layer, a hole transport layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer; and at least one layer in the organic layer contains the compound of structural formula (I).

##STR00001##

A light emitting element that includes a first electrode, a second electrode on the first electrode, and an emission layer between the first electrode and the second electrode is provided. The emission layer includes an organometallic compound represented by a specific chemical structure. Accordingly, the light emitting element exhibits a high color purity, a low driving voltage, a long service life, and a high efficiency.

A compound comprising a first ligand L.sub.A of Formula I

##STR00001##

is described. In Formula I, X.sup.1 and X.sup.6 to X.sup.10 are each independently C or N; X.sup.2 is CR.sup.1′ or N; X.sup.3 is CR.sup.1 or N; X.sup.4 is CR.sup.2 or N; X.sup.5 is CR.sup.3 or N; each R.sup.1, R.sup.2, R.sup.3, R.sup.A, R.sup.B, and R.sup.C is independently a hydrogen or a General Substituent; any two substituents may be joined or fused to form a ring; at least one of R.sup.1′, R.sup.1, R.sup.2, and R.sup.3 is a partially or fully deuterated alkyl or cycloalkyl group; at least one pair of R.sup.C are joined or fused to form a 5-membered or 6-membered ring. Formulations, OLEDs, and consumer products comprising the compound are also described.