Patent ID: 7198730

Claim:
A luminescent organometallic complex composition of matter, the composition comprising at least one transition metal, M, that produces phosphorescent emission at room temperature; at least one first monoanionic bidentate ligand coordinated through a nitrogen on a heteroaromatic ring and a carbon which is part of an aromatic group; and at least one second ligand, coordinated through a carbon atom on an aromatic group and having Formula III Ar[—(CH 2 ) m —Y] p Formula III wherein Ar is an aromatic group, Y is a group having a heteroatom capable of coordinating to metal M, m is an integer from 1 through 20, p is an integer from 1 through 5, and further wherein one or more of the hydrogens in (CH 2 ) m can be replaced with D or F, wherein Y is selected from NR 2 2 , OR 2 , SR 2 , and PR 3 2 , wherein R 2 is the same or different at each occurrence and is H or C n H 2n+1 ; and R 3 is the same or different at each occurrence and is selected from H, R 2 , and Ar.