Patent ID: 8372528
Filing Date: 2013-02-12
Classification: C07D,C07F,C09K,H01L,H05B,Y10S

Abstract:
1. A compound, having the structure: wherein M is a metal having an atomic weight greater than 40; (C—N) is a substituted or unsubstituted cyclometallated ligand; wherein at least one ligand functions as a phosphorescent emissive ligand in the compound at room temperature and at least one ligand does not function as a phosphorescent emissive ligand in the compound at room temperature; wherein the emissive ligand in the compound at room temperature has a triplet energy corresponding to a wavelength that is at least 80 nm greater than the wavelength corresponding to the triplet energy of a ligand that is not emissive in the compound at room temperature; each of R Z is selected from —CH optionally, any two adjacent substituted positions together form, independently, a fused 4- to 7-member cyclic group, wherein said cyclic group is cycloalkyl, cycloheteroalkyl, aryl, or heteroaryl, and wherein the 4- to 7-member cyclic group may be optionally substituted; X is independently selected from hydrogen, alkyl, alkenyl, alkynyl, alkylaryl, CN, CF n has a value of at least 1; and m+n is the maximum number of ligands that may be attached to the metal.