An organometallic compound, represented by Formula 1:

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

wherein, in Formula 1, M.sub.1 is a transition metal, Ln.sub.1 is a ligand represented by Formula 1A, Ln.sub.2 is a ligand represented by Formula 1B, n1 is 1 or 2, and n2 is 1 or 2:

##STR00001##

wherein, in Formulae 1A, 1B, CY.sub.1, CY.sub.2, CY.sub.4, X.sub.1, X.sub.2, Y.sub.1, R.sub.1, R.sub.2, R.sub.10, R.sub.20, R.sub.40, R.sub.31, R.sub.32, R.sub.33, R.sub.34, R.sub.40, b10, b20, and b40 are as provided herein, and wherein * and * each indicate a binding site to M.sub.1.

Provided is an organometallic compound including a first ligand L.sub.A selected from

##STR00001## ##STR00002##

In ligand L.sub.A, each of Y.sup.1 to Y.sup.10 is carbon or nitrogen; moiety B is a monocyclic or polycyclic fused ring structure including 5-membered and/or 6-membered rings; any two R.sub.A and R.sub.B can be fused or joined to form a ring; X is selected from O, S, Se, or NR; each R.sub.A and R.sub.B is independently hydrogen or a substituent selected from the general substituent defined herein; at least one R, R.sub.A, or R.sub.B is deuterium or a linking group between L.sub.A and another ligand that includes a deuterium substituted aromatic ring; and L.sub.A is coordinated to a metal M, selected from Os, Pd, Pt, Ir, Cu, Ag, or Au; and the compound is capable of emitting light with a peak maximum wavelength (λ.sub.max)≥700 nm at room temperature.

An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, wherein the emission layer includes an electron transport host, a hole transport host, and a dopant, wherein the dopant includes an organometallic compound, and wherein the organometallic compound does not comprise iridium, wherein the organic light-emitting device satisfies predetermined parameters described in the specification.

Metal complexes with cyclic ligands having Formula (I), ##STR00001##
are disclosed. Ligands with cyclic structure are believed to be beneficial to the rigidity and stability of the metal complexes, which is desirable for improving OLED device performance.

An organometallic compound is represented by Formula 1. A 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, wherein the emission layer includes the organometallic compound. An electronic apparatus including the light-emitting device:

##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 represented by Formula 1 are provided.

##STR00001##

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

##STR00001##

is provided. In Formula I, Ring A is a 5-membered or 6-membered ring, and moiety G has a structure of

##STR00002##

where
the dashed line marked with * is coordinated to Ir; the dashed line marked with # is bonded to Ring A; Y is selected from the group consisting of BR, BRR′, NR, PR, O, S, Se, C═O, C═S, C═Se, C═NR, C═CRR′, S═O, SO.sub.2, CR, CRR′, SiRR′, and GeRR′. Formulations, OLEDs, and consumer products containing the compound are also provided.

A 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, wherein the emission layer includes at least one organometallic compound represented by Formula 1:

##STR00001##

wherein Formula 1 is the same as described herein.

An organometallic compound represented by Formula 1:

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

wherein M.sub.1 is a transition metal, Ln.sub.1 is a ligand represented by Formula 1A, Ln.sub.2 is a ligand represented by Formula 1B, n1 is 1 or 2, and n2 is 1 or 2,

##STR00001##

wherein ring CY.sub.1 and ring CY.sub.2 are each independently a C.sub.5-C.sub.30 carbocyclic group or a C.sub.1-C.sub.30 heterocyclic group, ring CY.sub.41 is a phenyl group, ring CY.sub.42 is a 5-membered aromatic heterocyclic group, and the other substituents are as described herein.

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

##STR00001##

wherein substituents of Formula 1 are the same as described in the present specification.