Very high efficiency organic light emitting devices based on electrophosphorescence

摘要

Summary The invention relates to 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 phosphorescent organometallic compound, wherein the phosphorescent organometallic compound is a cyclometallated iridium or osmium compound in particular including a cyclometallated ring having a carbon-metal bond.