Patent ID: 8941099
Filing Date: 2015-01-27
Classification: 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 (A-1): wherein R (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 independently hydrogen or an alkyl substituent having 1-3 carbon atoms, and wherein at least one ring of the formula has one or more of said alkyl substituent.