Patent ID: 9048398
Filing Date: 2015-06-02
Classification: H01L

Abstract:
1. A light-emitting device comprising: an anode; a hole-injection layer over and in contact with the anode; a hole-transport layer over the hole-injection layer; a first emission layer over and in contact with the hole-transport layer; a spacing layer over and in contact with the first emission layer; a second emission layer over and in contact with the spacing layer; an electron-transport layer over and in contact with the second emission layer; an electron-injection layer over the electron-transport layer; and a cathode over and in contact with the electron-injection layer, wherein the first emission layer comprises a first host material and a first fluorescent material, wherein the second emission layer comprises a second host material and a second phosphorescent material, wherein the first fluorescent material exhibits an emission peak in a region ranging from 400 nm to 500 nm, and wherein the second phosphorescent material exhibits an emission peak in a region ranging from 560 nm to 700 nm.