Universal Display Corporation

Yonggang Wu

Bin Ma

Raymond Kwong

Chuanjun Xia

Chun Lin

James J Fiordeliso

Alexey Borisovich Dyatkin

Jason Brooks

Bert Alleyne

Suman Layek

Scott A Beers

Nasrin Ansari

Edward Barron

Zeinab M Elshenawy

Lichang Zeng

Vadim Adamovich

Dinesh Rayabarapu

Ed Barron

Scott Ansari

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.

Organic electroluminescent materials and devices

Triphenylene containing benzo-fused thiophene compounds are provided. Additionally, triphenylene containing benzo-fused furan compounds are provided. The compounds may be useful in organic light emitting devices, particularly as hosts in the emissive layer of such devices, or as materials for enhancement layers in such devices, or both.

Homoleptic organometallic iridium complexes formed from bidentate substitute phenylpyridine ligands are disclosed. Devices containing the homoleptic organometallic iridium complexes that exhibit improved device manufacturing, fabrication, stability, efficiency, and/or color are also disclosed.

A new class of compounds containing aza-dibenzothiophene or aza-dibenzofuran are provided. The compounds may be used in organic light emitting devices giving improved stability, improved efficiency, long lifetime and low operational voltage. In particular, the compounds may be used as the host material of an emissive layer having a host and an emissive dopant, or as a material in an enhancement layer.

A compound according to a formula I, devices incorporating the same, and formulations including the same are described. The compound according to the formula I can have the structure wherein R, R, R, R, Rand Reach represent mono, di, tri, tetra substitutions, or no substitution, Rrepresents mono, di, tri substitutions, or no substitution, R, R, R, R, R, Rand Rare each independently selected from the group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acid, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, and combinations thereof. A, A, A, A, A, and Aare each independently selected from N or C and n is an integer from 1 to 20.

Compounds including a ligand with a dibenzo-fused 5-membered ring substituent are provided. In particular, the compounds may be iridium complexes including imidazole coordinated to the dibenzo-substituted ligand. The dibenzo-fused 5-membered ring moiety of the ligand may be twisted or minimally twisted out of plane with respect to the rest of the ligand structure. The compound may be used in organic light emitting devices, particularly as emitting dopants in blue devices. Devices comprising the compounds may demonstrate improved stability while maintaining excellent color.

Phosphorescent emitters

Compounds comprising a triphenylene moiety and a benzo- or dibenzo-moiety are provided. In particular, the benzo- or dibenzo-moiety has a fused substituent. These compounds may be used in organic light emitting devices, particularly in combination with yellow, orange and red emitters, to provide devices with improved properties.

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Ewing, NJ, United States of America

Yonggang Wu