Patent ID: 7306857

Claim:
A binuclear organometallic complex represented by formula 1: wherein (C^N) represents a cyclometalating ligand bonded to M through nitrogen (N) and carbon (C), and represents the following structure, A is a phosphorus (P) or nitrogen (N); Z is a substituted or unsubstituted C 1 -C 20 alkylene, substituted or unsubstituted C 6 -C 20 arylene, —(CH 2 ) 2 P(C 6 H 5 )(CH 2 ) 2 — or —(CH 2 ) 2 O(CH 2 ) 2 —; X 1 , X 2 , X 3 and X 4 are independently substituted or unsubstituted C 1 -C 20 alkyl, substituted or unsubstituted C 6 -C 20 aryl or a substituted or unsubstituted C 4 -C 20 cycloalkyl; M 1 and M 2 are Ir; Y 1 and Y 2 are independently a halogen atom or CN; R 1 , R 2 , R 3 and R 4 are independently a monosubstituted or multisubstituted substituent, and selected from the group consisting of hydrogen, halogen atom, C 1 -C 20 alkyl, C 6 -C 20 aryl, silyl or amino group; and n is 1 or 2.