Oled with area defined multicolor emission within a single lighting element

摘要

Disclosed is an organic electroluminescent device (205), comprising: a) a substrate (208); b) a first electrode (211) disposed over the substrate; c) a composite light emitting layer (216) comprising two or more light emissive materials, disposed over the first electrode; and d) a second electrode (217) disposed over the composite light emissive layer, the electrodes commonly and singularly addressing the composite light emissive layer.