Patent ID: 8415030

Claim:
A phosphorescent transition metal complex represented by formulas Ia, Ib, Ic, or their stereo isomers, which comprises one facially arranged, carbon-phosphorus-carbon (C^P^C) tridentate chelate, and one bidentate carbon-nitrogen (C^N) or azolate-nitrogen (A^N) anionic chromophoric chelate, and one arbitrary neutral donor ligand (L); or comprises one facially arranged, carbon-phosphorus-carbon (C^P^C) tridentate chelate, and one neutral diimine nitrogen-nitrogen (N^N) chromophoric chelate, and one arbitrary anionic donor ligand (X): wherein M is iridium, osmium or ruthenium; the C^N, A^N or N^N chelates have a general representation of Ar 1 -Ar 2 , wherein Ar 1 is aryl, substituted aryl or polyaromatic fragment in the C^N chelate; pyrrolide, functionalized pyrrolide, pyrazolate, functionalized pyrazolate, triazolate, functionalized triazolate or tetrazolate group in the A^N chelate; or heterocyclic nitrogen donor group in the diimine N^N chelate, while Ar 2 in each of the C^N, A^N and N^N chelates of formula Ia, Ib and Ic is a neutral heteroaromatic N-containing donor group; and the C^P^C chelate has a formula of PR 4 (OAr 5 ) 2 , wherein R 4 is alkyl, aryl, substituted aryl, aryloxyl, or substituted aryloxyl; and Ar 5 is an aryl or substituted aryl comprising a R 5 substituent, wherein R 5 is alkyl, alkoxyl, halide, or pseduohalide; and a carbon atom in each Ar 5 is ortho cyclometalated to M.