Patent ID: 6939624
Filing Date: 2005-09-06
Classification: C07F,C09K,H01L,H05B,Y10S

Abstract:
1. An organic light emitting device having an emissive layer comprising an organometallic compound, wherein the organometallic compound comprised consists of a metal having an atomic number of at least 72; at least one mono-anionic, bidentate, carbon coordination ligand bound to the metal, wherein the at least one mono-anionic, bidentate, carbon-coordination ligand is substituted with at least one of an electron donating substituent and an electron withdrawing substituent, and at least one non mono-anionic, bidentate, carbon coordination ligand bound to the metal, wherein the mono-anionic, bidentate, carbon-coordination ligand is selected from the group consisting of wherein wherein R