Patent ID: 8334057
Filing Date: 2012-12-18
Classification: H01L

Abstract:
1. A light-emitting element comprising: a mixed layer including a first hole transporting substance and a metal oxide having an electron accepting property to the first hole transporting substance between a first electrode and a second electrode; a hole transporting layer including a second hole transporting substance over the mixed layer; a light-emitting layer including a light-emitting substance which emits green light over the hole transporting layer; and an electron transporting layer including an electron transporting substance over the light-emitting layer; wherein the mixed layer is in contact with the first electrode, wherein the mixed layer has a thickness of 120 to 180 nm, and wherein the metal oxide is included in the mixed layer at a concentration of 7 vol % to 13 vol % with respect to the first hole transporting substance.