Patent ID: 8252434

Claim:
A light emitting device comprising: a first electrode; a second electrode; n light emitting layers formed between the first electrode and the second electrode; a first mixed layer formed 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 formed 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 contains a substance having an electron transporting property or a bipolar substance, and a substance selected from the group consisting of an alkali earth metal, an alkali metal oxide, an alkali earth metal oxide, an alkali metal fluoride, and an alkali earth metal fluoride, wherein the second mixed layer contains an aromatic hydrocarbon and a metal oxide, wherein the metal oxide is selected from the group consisting of molybdenum oxide, vanadium oxide, ruthenium oxide, and rhenium oxide, and wherein the aromatic hydrocarbon is an anthracene derivative.