Patent ID: 8071226

Claim:
A red phosphorescent compound of Formula 1: wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently a hydrogen atom, a C 1 -C 18 alkyl group, a C 1 -C 18 alkoxy group, a halogen atom, a C 1 -C 18 haloalkyl group, a substituted or unsubstituted C 5 -C 18 aryl group, a C 5 -C 18 cycloalkyl group, or a substituted or unsubstituted 5- to 18-membered aromatic heterocyclic group containing at least one heteroatom selected from N, O and S atoms, with the proviso that the substituted aryl group and the substituted aromatic heterocyclic group is substituted with at least one substituent selected from the group consisting of C 1 -C 10 alkyl, C 1 -C 10 alkoxy, cyano, C 1 -C 10 alkylamino, alkylsilyl, halogen, C 6 -C 10 aryl, C 6 -C 10 aryloxy, C 6 -C 10 arylamino, C 6 -C 10 arylsilyl, and C 3 -C 19 heteroaryl; each X is a trialkylsilyl group; and A 1 , A 2 and A 3 are independently a hydrogen atom, a C 1 -C 18 alkyl group, a halogen atom, a C 1 -C 18 haloalkyl group, a C 5 -C 18 aryl group or a C 5 -C 18 cycloalkyl group, with the proviso that A 2 is optionally bonded to A 1 or A 3 to form a ring.