IRIDIUM COMPLEXES WITH 3-PHENYL-3H-IMIDAZO4,5-bPYRIDINE, 3-PHENYL-3H-IMIDAZO4,5-bPYRAZINE AND 1-PHENYL-3H-IMIDAZO4,5-bPYRIDINE CARBENE LIGANDS USED AS PHOSPHORESCENT EMITTERS IN ORGANIC LIGHT EMITTING DEVICES

摘要

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.