VERY LOW VOLTAGE, HIGH EFFICIENCY PHOSPHORESCENT OLED IN A P-I-N STRUCTURE

摘要

Abstract of the Disclosure An organic light emitting device is provided, having a p-doped organic layer, an n-doped layer, and a phosphorescent emissive layer disposed between the p-doped and n-doped layers. Blocking layers are used to confine electrons, holes, and excitons in the emissive layer. A device having a cathode on the top is provided, as well as an "inverted"device having a cathode on the bottom.