Patent ID: 7154114
Filing Date: 2006-12-26
Classification: C09K,H01L,H05B

Abstract:
1. A light emitting device, comprising: (a) an anode; (b) a cathode; (c) an organic layer disposed between the anode and the cathode, wherein the organic layer comprises a host and a dopant, and the host comprises a compound having at least one carbene atom coordinated to iridium, and the compound has the structure:  wherein the dotted lines represent optional double bonds; ring A is independently an aromatic cyclic, heterocyclic, fused cyclic, or fused heterocyclic ring with at least one carbon atom coordinated to Ir, wherein ring A can be optionally substituted with one or more substituents Ra; R each substituent J is independently selected from the group consisting of R′, CN, CF each R′ is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl, and heteroaryl; b is 0, 1, 2, or 3.