Patent ID: 6759145
Filing Date: 2004-07-06
Classification: H01L,Y10S,Y10T

Abstract:
A white light emitting organic electroluminescent organic (EL) device comprising:a substrate; an anode formed on said substrate; at least one hole transporting layer formed on said anode; at least one luminescent layer formed on said hole transporting layer, wherein a first dopant is doped into said luminescent layer; at least one electron transporting layer formed on said luminescent layer, wherein a second dopant is doped into said electron transporting layer; and, a cathode formed on said electron transporting layer; wherein a first light is emitted by said first dopant, a second light is emitted by said second dopant, and a third light is emitted by said luminescent layer when the device is applied with a bias voltage; and, wherein the luminescence intensity of said second light and said third light is proportional to the volume ratio of said first dopant to said luminescent layer.