Patent ID: 9343689
Filing Date: 2016-05-17
CPC Classification: B82Y,H01L

Claim Text:
1. A light-emitting device comprising: a substrate having a light-transmitting property; a transparent conductive layer over the substrate; a light-emitting material layer over the transparent conductive layer; and a conductive layer over the light-emitting material layer, wherein the light-emitting material layer comprises: wherein the first layer, the second layer, and the third layer are positioned between the m-th light-emitting layer and (m+1)-th light-emitting layer, wherein the first layer comprises a first donor material, wherein the second layer comprises an electron-transport material and a second donor material, wherein the third layer comprises an acceptor material, and wherein a LUMO level of the second layer is between a LUMO level of the first layer and an acceptor level of the third layer.