Abstract: A compound having a formula M(LA)(LB)(LC) is disclosed. Each of ligands LA and LB are mono-anionic bidentate ligands coordinated to metal M forming a 5-member cyclometalated ring. Ligands LA and LB are covalently linked by a first linking group, where there is at least one loop of M-LA-first linking group-LB-M having only carbocyclic or heterocyclic groups in the loop other than M. Wherein the first linking group includes multiple aliphatic or aromatic rings that are separated by at least one single bond, where each ring in the first linking group is part of the backbone of the loop. Devices, such as organic light emitting diodes, including the compounds are also disclosed.

Abstract: A compound comprising a ligand LA coordinated to a metal M wherein ring A, ring T, and ring W are independently selected from a 5-membered or 6-membered heterocyclic or carbocyclic ring, and the ring W is fused to the ring T. The metal compounds having a ligand LA can be found in an OLED that includes an organic layer positioned between an anode and a cathode where the organic layer comprises a metal compound above having a ligand LA disclosed herein. We also describe a consumer product comprising the OLED.

Abstract: A compound having a formula M(LA)(LB)(LC) is described. In formula M(LA)(LB)(LC), ligands LA and LB are each a mono-anionic bidentate ligand coordinated to metal M forming a 5-member cyclometalated ring and ligands LA and LB are covalently linked by a linking group. There is at least one loop of M-LA-linking group-LB-M having only arylene or heteroarylene groups in the loop other than M. In the compound, each ring in the linking group is part of a backbone of the loop; and either (i) the loop comprises a specific DBX moiety and the linking group comprises two or more arylene or heteroarylene groups, or (ii) the linking group comprises three or more arylene or heteroarylene groups. Formulations, OLEDs, and consumer product containing the compound are also disclosed.

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 spiro-bisilepine compounds. Also provided are formulations comprising these spiro-bisilepine compounds. Further provided are OLEDs and related consumer products that utilize these spiro-bisilepine compounds.

Abstract: Provided are carbazole-based host compounds containing a 9-membered ring represented by Formula I where the variables are defined herein. Also provided are formulations comprising these carbazole-based hosts compounds. Further provided are OLEDs and related consumer products that utilize these carbazole-based hosts compounds.

Abstract: A compound having the formula Ir(LA)n(LB)3?n is disclosed wherein LA is an aza-DBF ligand and LB is an alkyl-substituted phenylpyridine ligand, wherein the compound has a structure according to Formula I: wherein A1, A2, A3, A4, A5, A6, A7, and A8 comprise carbon or nitrogen; wherein at least one of A1, A2, A3, A4, A5, A6, A7, and A8 is nitrogen; wherein ring B is bonded to ring A through a C—C bond; wherein the iridium is bonded to ring A through a Ir—C bond; wherein X is O, S, or Se; wherein R1 and R2 each independently represent mono-, di-, tri-, tetra-substitution, or no substitution; wherein R? and R? each independently represent mono-, di-substitution, or no substitution; wherein any adjacent substitutions in R?, R?, R1, R2, R3, R4, R5, and R6 are optionally linked together to form a ring; wherein R1, R2, R?, and R? are each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl,

Abstract: A composition of materials including a first compound having a structure according to Formula I

Abstract: Provided are compounds that include a ligand LA of Formula I

Abstract: A composition of materials including a first compound having a structure according to Formula I

Abstract: Provided is a compound comprising a ligand LA having where ring A is a 5-membered or 6-membered cathocyclic or heterocyclic ring; one of X1-X4 is C if linked to ring A; one of X1-X4 is N if adjacent to the linking C and coordinates to a metal M to form a five-membered chelate ring as indicated by the two dashed lines.

Abstract: Provided are compounds that include a ligand LA of Formula I

Abstract: Organometallic compounds comprising an imidazole carbene ligand having a N-containing ring fused to the imidazole ring are provided. In particular, the N-containing ring fused to the imidazole ring may contain one nitrogen atom or more than one nitrogen atom. These compounds may demonstrate high photoluminescent (PL) efficiency, Gaussian emission spectra, and/or short excited state lifetimes. These materials may be especially useful as blue phosphorescent emitters.

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: Organometallic compounds comprising an imidazole carbene ligand having a N-containing ring fused to the imidazole ring are provided. In particular, the N-containing ring fused to the imidazole ring may contain one nitrogen atom or more than one nitrogen atom. These compounds may demonstrate high photoluminescent (PL) efficiency, Gaussian emission spectra, and/or short excited state lifetimes. These materials may be especially useful as blue phosphorescent emitters.

Abstract: The present invention relates to novel organic compounds containing oligocarbazoles. The compounds are useful for organic light-emitting diodes. The compounds are also useful for charge-transport and charge-blocking layers, and as hosts in the light-emissive layer for organic light emitting devices (OLEDs).

Abstract: A neutral Ir compound having a first ligand LA of Formula I is disclosed. The Ir compound having azaperylene moieties are useful as emissive dopants in OLED devices for improving the device performance.

Abstract: Ligands with fused spirocyclic substitutions and metal complexes formed with such ligands and having improved performance in OLED applications are disclosed.

Abstract: A compound comprising a ligand LA of Formula I coordinated to a metal M as represented by the dotted lines wherein ring A is a 5-membered or 6-membered carbocyclic or heterocyclic ring, and ring B is a multicyclic ring system comprising four to eight fused 5-membered or 6-membered, carbocyclic or heterocyclic rings; wherein the ring B includes a structure of Formula II wherein ring C is a 5-membered or 6-membered carbocyclic or heterocyclic ring, and the dotted lines of Formula II represent fusion of the structure of Formula II as part of the multicyclic ring system of ring B; T1, T2, and T3 are independently selected from N or C; and L is a linker L2-L1 with L2 and L1 independently selected from the group consisting of O, S, NRN, CR1R2, CR3R4, SiR1R2, and SiR3R4; wherein at least one of L1 or L2 is CR1CR2 or SiR1R2; and the metal M is selected from the group consisting of Ir, Rh, Re, Ru, Os, Pt, Pd, Au, and Cu.

Abstract: Novel iridium complexes containing phenylpyridine and pyridyl aza-benzo fused ligands are described. These complexes are useful as light emitters when incorporated into OLEDs.