Patent ID: 8592585
Filing Date: 2013-11-26
Classification: C07F

Abstract:
1. A phosphorescent tris-chelated iridium metal complex comprising one non-conjugated cyclometalated ligand forming a coordination sphere thereof with iridium, and two ligated chromophores being incorporated into the coordination sphere, wherein the ligated chromophores possess a relatively lower energy gap in comparison with that of the non-conjugated cyclometalated ligand, the latter afforded an effective barrier for inhibiting the ligand-to-ligand charge transfer process, so that a subsequent radiative decay from an excited state of the phosphorescent tris-chelated iridium metal complex will be confined to the ligated chromophores, wherein the complex is represented by the following formula IIb and its stereo isomers: wherein the non-conjugated cyclometalated ligand is represented by P and C linked with an arch, and has a formula of Ar wherein Ar wherein the ligated chromophore is represented by the L and X linked with an arch, and has formula of Ar wherein Ar and wherein L is N or O, and X is C, N or O.