| 摘要 |
An organic light is emitting the device comprising an emissive region, wherein the emissive region comprises a host material, and a plurality of emissive dopants wherein the emissive region is comprised of a plurality of bands and each emissive dopant is doped into a separate band within the emissive region, and wherein at least one of the emissive dopants emits light by phosphorescence. |
