Patent ID: 8815419
Filing Date: 2014-08-26
Classification: H01L,H05B,Y10S

Abstract:
1. A light emitting device comprising: a first electrode; a second electrode; n light emitting layers between the first electrode and the second electrode; a first mixed layer between an m-th light emitting layer of the n light emitting layers and an (m+1)-th light emitting layer of the n light emitting layers; and a second mixed layer between the m-th light emitting layer and the (m+1)-th light emitting layer, wherein n is a natural number of 2 or more and m is a natural number of 1≦m≦n−1, wherein the first mixed layer is provided to be closer than the second mixed layer to the first electrode, wherein the first mixed layer comprises a substance having an electron transporting property or a bipolar substance, and a substance selected from the group consisting of an alkali metal, an alkaline earth metal, an alkali metal oxide, an alkaline earth metal oxide, an alkali metal fluoride, and an alkaline earth metal fluoride, wherein the second mixed layer comprises a metal oxide and an organic compound comprising an anthracene skeleton, wherein the metal oxide shows an electron accepting property with respect to the organic compound comprising an anthracene skeleton, and wherein the organic compound does not have an arylamine skeleton.