Patent ID: 7320833

Claim:
An active layer comprising at least one compound having Formula III: PtL 1 L 3 L 4 (III) where: L 1 has Formula IV: wherein: R 1 =H, R 4 , OR 4 , N(R 4 ) 2 R 2 =H, C n F 2n+1 , R 3 =H, C n F 2n+1 , R 4 is the same or different at each occurrence and is H, alkyl, aryl, or adjacent R 4 groups can join together to form a 5- or 6-membered ring, and n is an integer from 1 through 20; L 3 is a monoanionic monodentate ligand; and L 4 is a nonionic monodentate phosphine ligand.