A compound comprising a metal M and a first ligand L.sub.A having a structure of Formula I,

##STR00001##

is described. In Formula I, each independently represents a single bond or a double bond; each of X.sup.1′ to X.sup.4′ is independently C, N, or NR′; at least one of X.sup.1 to X.sup.4 is NR′; each R.sup.A′, R′, R.sup.1, R.sup.2, and R.sup.3 is independently hydrogen or a general substituent; at least one of R.sup.A′, R′, R.sup.1, R.sup.2, and R.sup.3 comprises the metal M; when X.sup.1 and X.sup.2 are both NR′, the B atom of Formula I forms a maximum of one direct bond to a nitrogen atom, and does not form a direct bond to an oxygen atom; and any two adjacent R.sup.A, R′, R.sup.1, R.sup.2, and R.sup.3 can be joined or fused to form a ring. Formulations, OLEDs, and consumer products including the compounds are also described.

An organometallic compound, a light-emitting device including the organometallic compound, and an electronic apparatus including the light-emitting device are provided. The light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode and including an emission layer. The organometallic compound is represented by Formula 1:

##STR00001##

The description of Formula 1 is the same as in the specification.

A light-emitting device including an organometallic compound represented by Formula 1, an electronic apparatus including the light-emitting device, and the organometallic compound are provided

##STR00001##

Provided are an organometallic compound represented by Formula 1, a light-emitting device including the organometallic compound, and an electronic apparatus including the light-emitting device:

##STR00001##

Each substituent in Formula 1 is the same as described in the specification.

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

##STR00001##

in provided. In Formula I, moiety X is a fused multicyclic ring system comprising two or more rings; rings A and B are independently a 5- or 6-membered carbocyclic or heterocyclic ring; Z.sup.1, Z.sup.2, and Z.sup.3 are each C or N; K.sup.3 and K.sup.4 are each a direct bond, O, or S; each R.sup.A, R.sup.B, and R.sup.X is hydrogen or a substituent; and at least one of the following conditions is true: (1) ring B is partially or fully deuterated, or (2) at least one R.sup.B is an aryl or heteroaryl group that is partially or fully deuterated. The ligand L.sub.A is coordinated to a metal M through the dashed lines, and any two substituents except an R.sup.X with an R.sup.B may be joined to form a ring. Formulations, OLEDs, and consumer products containing these compounds are also provided.

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

##STR00001##

is provided. In Formula I, moieties A and B are each a monocyclic ring or a polycyclic fused-ring system; Z.sup.1 to Z.sup.4 are each C or N; K is a direct bond, O, or S; each R.sup.A and R.sup.B is independently a hydrogen or a General Substituent; at least one R.sup.A or R.sup.B is R*, wherein R* has a structure of Formula II, ---L-GeR.sup.1R.sup.2R.sup.3; L is a direct bond or an organic linker; and L.sub.A is coordinated to a metal M by the dashed lines; and metal M is selected from Ir, Rh, Re, Ru, Os, Pt, Pd, Ag, Au, or Cu.

The present invention relates to an organic electronic device, comprising a first electrode, a second electrode, and a substantially organic layer comprising a compound according to formula (I) between the first and the second electrode: ##STR00001##
wherein M is a metal ion, each of A.sup.1-A.sup.4 is independently selected from H, substituted or unsubstituted C6-C20 aryl and substituted or unsubstituted C2-C20 heteroaryl and n is valency of the metal ion.

The present invention relates to metal complexes of formula (1), ##STR00001##
and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes, in particular as emitters.

A metal complex represented by the formula (1) is useful for production of a light emitting device excellent in light emission efficiency:

##STR00001##

M represents a rhodium, palladium, iridium, or a platinum atom; n.sup.1 represents 1, 2 or 3; n.sup.2 represents 0, 1 or 2; R.sup.1 to R.sup.6 represent a hydrogen atom, an alkyl group, or an aryl group; Ring R.sup.B1 and Ring R.sup.B2 represent an aromatic hydrocarbon ring or an aromatic hetero ring; one of Y.sup.a and Y.sup.b is a single bond, and the other is a group represented by the formula (C-1):

##STR00002##

R.sup.C represents a carbon atom, a silicon atom, a germanium atom, a tin atom or a lead atom; Ring R.sup.C1 and Ring R.sup.C2 represent an aromatic hydrocarbon ring or an aromatic hetero ring; and A.sup.1-G.sup.1-A.sup.2 represents an anionic bidentate ligand.

An organic electroluminescent device includes a pair of electrodes; and an organic layer between the pair of electrodes, which includes a light-emitting layer, wherein the organic layer contains a compound represented by the following formula (I); and the light-emitting layer contains a iridium complex phosphorescent material:

##STR00001##

wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 each represents a hydrogen atom or a substituent, and contiguous substituents of R.sup.1 to R.sup.8 may be bonded to each other to form a condensed ring; R.sup.9 represents an alkyl group, an alkenyl group, an aryl group, a hetero-aryl group, or a silyl group, and each of which group may be substituted with a substituent; and at least one of R.sup.1 to R.sup.9 represents a deuterium atom or a substituent containing a deuterium atom.