Patent ID: 8455114

Claim:
A light emitting element comprising: a first layer; a second layer; and a third layer, wherein the first layer, the second layer, and the third layer are interposed between a first electrode and a second electrode, wherein the first layer contains a first substance of which a ratio of any one of an electron mobility and a hole mobility to the other one is 100 or less, and a second substance exhibiting an electron accepting ability with respect to the first substance, wherein the second layer contains a third substance of which a ratio of any one of an electron mobility and a hole mobility to the other one is 100 or less, and a fourth substance exhibiting an electron donating ability with respect to the third substance, wherein the third layer contains a light emitting substance, wherein the second layer is interposed between the first layer and the third layer, and wherein the first layer is in direct contact with the second layer.