Patent ID: 7534505

Claim:
An organic 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 compound comprising one or more carbene ligands coordinated to a metal center, wherein the compound has the structure: wherein M is a metal; R 1 is independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; R 2 , R 3 , R 8 , R 10 , R 11 , and R 12 are independently selected from hydrogen, alkyl, alkenyl, alkynyl, aralkyl, CN, CF 3 , CO 2 R′, C(O)R′, C(O)NR′ 2 , NR′ 2 , NO 2 , OR′, SR′, SO 2 , SOR′, SO 3 R′, halo, aryl, heteroaryl, substituted aryl, substituted heteroaryl, or a heterocyclic group; and additionally or alternatively, one or more of R 1 and R 2 , and R 2 and R 3 , and two R 8 groups, two R 11 groups, and two R 12 groups on the same ring together form independently a 5 or 6-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl or heteroaryl; and wherein said cyclic group is optionally substituted by one or more substituents J; each substituent J is independently selected from the group consisting of R′, CN, CF 3 , C(O)OR′, C(O)R′, C(O)NR′ 2 , NR′ 2 , NO 2 , OR′, SR′, SO 2 , SOR′, or SO 3 R′, and additionally, or alternatively, two J groups on adjacent ring atoms form a fused 5- or 6-membered aromatic group; each R′ is independently selected from halo, H, alkyl, alkenyl, alkynyl, heteroalkyl, aralkyl, aryl and heteroaryl; (X-Y) is selected from a photoactive ligand or an ancillary ligand; d is 0, 1, 2, 3, or 4; m is a value from 1 to the maximum number of ligands that may be attached to metal M; m+n is the maximum number of ligands that may be attached to metal M.