Abstract: A composition is disclosed that includes a first compound capable of functioning as a host in an emissive layer of an OLED at room temperature; and a second compound that includes a ligand LA of Formula III where ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring; where R represents two adjacent substituents that are joined together to form a ring that is fused to ring B, and R has a structure of Formula IV or Formula V disclosed herein.

Abstract: A compound comprising a first ligand LA having a Formula selected from: is disclosed. In the Formulas rings B and C are 5-membered or 6-membered aromatic or heteroaromatic ring; Z1, Z2, X1, X2, X3, X4, X5, and X6 are each C or N, but X1, X2, X3, or X4 is C when it forms a direct bond to Z2; Y is selected from CRR?, NR?, O, S, and Se; R, R?, RA, RB, RC, and RD are each selected from a variety of substituents; the ligand LA is coordinated to a metal M by the dashed lines, and optionally to other ligands. Organic light emitting devices and consumer products containing the compounds are also disclosed.

Abstract: A phosphorescent emitter compound having a first ligand LA having a Formula I, is disclosed. An OLED having the compound incorporated therein is also disclosed.

Abstract: A compound of formula Ir(LA)m(LB)n is provided, where m and n are 1 or 2, and m + n = 3; where ligand LA has a structure of Formula I, ; ligand LB has a structure of Formula II, and LA and LB are different. In Formulae I and II, moiety E is a ring or polycyclic fused ring system; each of X1 to X10 is C or N; Y is a linking group that forms a 5-membered ring; each R*, R?, R?, RA, RB, RC, RD, and RF is hydrogen or a General Substituent; RE is hydrogen or a General Substituent other than silyl; and RE and at least one of RA or RB comprise aliphatic carbon atoms. Formulations, OLEDs, and consumer products containing the compound are also provide.

Abstract: Provided are organometallic compounds comprising an at least two-dentate ligand comprising at least one 5-membered or 6-membered carbocyclic or heterocyclic ring. Further provided are organometallic compounds containing a platinum atom as the central metal atom. Also described are their various uses including as emitters in devices such as organic light emitting diodes and related electronic devices. Also provided are formulations comprising these organometallic compounds containing a platinum atom as the central metal atom. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these organometallic compounds.

Abstract: A phosphorescent metal complexes containing a ligand LA having the formula selected from is disclosed.

Abstract: Novel Iridium complexes having three different bidentate ligands useful for phosphorescent emitters in OLEDs are disclosed. At least one of the three different bidentate ligands is a carbene ligand.

Abstract: Provided are compounds capable of functioning as an emitter in an organic light emitting device at room temperature, and their use in OLED related electronic devices.

Abstract: A compound is disclosed that includes a ligand LA of Formula I where ring C is a 5-membered or a 6-membered carbocyclic or heterocyclic ring; each RA, RB, and RC independently represents mono to the maximum allowable number of substitutions, or no substitution; LA is complexed to a metal M; M is optionally coordinated to other ligands; the ligand LA is optionally linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand; and any two substituents of RB and RC may be joined or fused together to form a ring.

Abstract: A compound having a first ligand LA of Formula I useful as phosphorescent dopant in OLEDs is disclosed.

Abstract: A compound comprising a first ligand LA of Formula I, is provided. In addition, C1 and C2 are joined to a structure of Formula II, In the first ligand, C1 and C2 are carbon atoms; K is selected from the group consisting of a direct bond, O, S, N(R?), P(R?), B(R?), C(R?)(R?), and Si(R?)(R?); each of Y1 and Y2 is O, S, Se, NR, CR?R?, SiR?R?, GeR?R?, BR?, BR?R?, or PR?; Z is selected from the group consisting of N, CR?, SiR?, and GeR?; moiety B is a monocyclic ring or a fused polycyclic ring structure; each R?, R?, RA, RB, R, R?, and R? is hydrogen or a General Substituent; the first ligand is coordinated to a metal M; and any two of RA, RB, R, R? and R? can be joined or fused to form a ring. Formulations, OLEDs, and consumer products containing the compound are also provided.

Abstract: A compound including a first ligand LX of Formula II is disclosed, where F is a 5-membered or 6-membered carbocyclic or heterocyclic ring; each RF and RG independently represents mono to the maximum possible number of substitutions, or no substitution; Z3 and Z4 are each independently C or N and coordinated to a metal M to form a 5-membered chelate ring; G is a fused ring structure comprising five or more fused heterocyclic or carbocyclic rings, of which one or two rings are of Formula III the fused heterocyclic or carbocyclic rings in the fused ring structure G are 5-membered or 6-membered; of which if two or more 5-membered rings are present, at least two of the 5-membered rings are fused to one another; Y can be one of BR?, NR?, PR?, O, S, Se, C?O, S?O, SO2, CR?R?, SiR?R?, and GeR?R?; the metal M can be coordinated to other ligands; and the ligand LX can be linked with other ligands to comprise a tridentate, tetradentate, pentadentate, or hexadentate ligand.

Abstract: Transition metal compounds having naphthalene imide moiety having enhanced electron withdrawing property and more metal-ligand charge transfer (MLCT) based excited state are disclosed. The disclosed compounds will improve the photoluminescent quantum yield (PLQY) and produce phosphorescent emission in red to near IR region which has many desired applications.

Abstract: Provided are substituted acetylacetonate compounds. Also provided are formulations comprising these substituted acetylacetonate compounds. Further provided are OLEDs and related consumer products that utilize these substituted acetylacetonate organometallic compounds.

Abstract: Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Abstract: Provided are compounds that include a ligand LA of the following Formula III: that contain heavy elements like Sb, Bi, Ge, or Te. Also provided are formulations including such compounds. Further provided are OLEDs and related consumer products that utilize such compounds.

Abstract: Provided are transition metal compounds having 5-membered carbocyclic or heterocyclic ring in a unique configuration of fused rings per Formula I The compounds show improved phosphorescent emission in red to near IR region and are useful as emitter materials in organic electroluminescence device.

Abstract: Provided are organometallic compounds comprising a ligand with fused aromatic structures according to Formula I as described herein and their various uses including as emitters in devices and related electronic devices. Also provided are formulations comprising these compounds. Further provided are organic light emitting devices (OLEDs) and related consumer products that utilize these compounds.

Abstract: An OLED including an anode, a cathode, and an organic layer between the anode and the cathode, where the organic layer includes a compound having the formula [LA]3-nIr[LB]n is disclosed.

Abstract: Cyclometallated iridium complexes having triphenylene or aza triphenylene and bulky alkyl substitution that can be used as emitters in OLEDs to improve the external quantum efficiency (EQE) and lifetime of OLEDs are disclosed.