Patent ID: 7723520

Claim:
An organic phosphorescent compound represented by Chemical Formula (1): wherein, L is an organic ligand; A is N; B is C; R 1 represents (C 6 -C 20 )aryl; R 2 through R 4 independently represent hydrogen, linear or branched (C 1 -C 20 )alkyl, (C 1 -C 20 )alkoxy, (C 3 -C 12 )cycloalkyl, (C 6 -C 20 )aryl, halogen, tri(C 1 -C 20 )alkylsilyl or tri(C 6 -C 20 )arylsilyl; R 5 and R 6 independently represent hydrogen, a linear or branched (C 1 -C 20 )alkyl, (C 6 -C 20 )aryl or halogen; R 5 and R 6 may be linked via (C 3 -C 12 )alkylene or (C 3 -C 12 )alkenylene with or without a fused ring to form an alicyclic ring, or a monocyclic or polycyclic aromatic ring; the alkyl or aryl of R 5 and R 6 , or the alicyclic ring, or the monocyclic or polycyclic aromatic ring formed therefrom by linkage via (C 3 -C 12 )alkylene or (C 3 -C 12 )alkenylene with or without a fused ring may be further substituted by one or more substituent(s) selected from linear or branched (C 1 -C 20 )alkyl optionally substituted with halogen, (C 1 -C 20 )alkoxy, halogen, tri(C 1 -C 20 )alkylsilyl, tri(C 6 -C 20 )arylsilyl and (C 6 -C 20 )aryl; the aryl of R 1 and the alkyl, alkoxy, cycloalkyl and aryl of R 2 through R 4 may be further substituted by one or more substituent(s) selected from linear or branched (C 1 -C 20 )alkyl optionally substituted with halogen, (C 1 -C 20 )alkoxy, halogen, tri(C 1 -C 20 )alkylsilyl, tri(C 6 -C 20 )arylsilyl and (C 6 -C 20 )aryl; and n is an integer from 1 to 3.