Patent ID: 8048537

Claim:
A cyclometalated transition metal complex represented by Formula 1: where M is a transition metal; is a first mono anionic bidentate chelating ligand; is a second mono anionic bidentate chelating ligand selected from the group consisting of ligands represented by formulae below: q is an integer of 0 to 5; Z is O, S, or NR 4 ; r is an integer of 0 to 5; and R 1 through R 8 are each independently halogen, CF 3 , CN, silyl, alkyl, aryl, arylalkyl, alkoxy, aryloxy, amino, or arylene, wherein the aryl, the arylalkyl, and the aryloxy can be each independently substituted with halogen, CF 3 , CN, silyl, alkyl, aryl, alkoxy, aryloxy, amino, or arylene, and adjacent Rs may be fused together to form a five to seven-membered aliphatic or aromatic ring; X and Y are each independently C, S, O, or N; CY1, CY2, and CY3 are each independently aromatic or aliphatic rings; and n is 1 or 2.