Patent ID: 9112171
Filing Date: 2015-08-18
Classification: C07C,C09K,H01L

Abstract:
1. An organic light emitting device comprising an anode, a cathode and an emissive layer, wherein the emissive layer is located between the anode and the cathode, and the emissive layer comprises a host material and a phosphorescent emitter material, wherein: (a) the host material comprises a substituted or unsubstituted hydrocarbon compound having the chemical structure represented by the formula: wherein, in the host material, each of Ra and Ar and (b) the phosphorescent emitter material comprises a phosphorescent organometallic complex having a substituted chemical structure represented by one of the following partial chemical structures represented by the formulas: wherein R is hydrogen or methyl, and at least one of R is methyl, wherein the dashed lines represent bonds with metal M.