Patent ID: 8476822
Filing Date: 2013-07-02
Classification: H01L

Abstract:
1. An organic light emitting device, comprising: a first electrode comprising a transparent metallic oxide; a second electrode; at least one organic layer disposed between the first electrode and the second electrode, the at least one organic layer including an emissive layer, wherein the emissive layer includes an emissive material with an intrinsic emission spectrum having a peak emission wavelength in the visible spectrum less than 500 nm; and a color saturation enhancement layer disposed between the first electrode and the second electrode and in direct contact with the first electrode, wherein the color saturation enhancement layer consists essentially of one or more metals or conductive doped inorganic semiconductors; wherein the color enhancement saturation layer has an index of refraction at least 0.2 different from that of the at least one organic layer and is in direct contact with the at least one organic layer; wherein the color saturation enhancement layer has a thickness of 1-10 nm; and wherein the reflectivity of the color saturation enhancement layer is in the range 5% to 30% for the peak wavelength in the intrinsic emission spectrum of the emissive material.