Patent ID: 8920940
Filing Date: 2014-12-30
Classification: C09K,H01L,H05B,Y10S,Y10T

Abstract:
1. A light-emitting element comprising: a hole injecting layer, a hole transporting layer, a light-emitting layer, an electron transporting layer, an electron injecting layer, and a second electrode which are stacked sequentially over a first electrode; wherein the light-emitting layer comprises a host material and an organometallic complex having a structure represented by a general formula (6), wherein the hole injecting layer comprises a mixture of a molybdenum oxide and an aromatic amine based compound, wherein the electron injecting layer comprises an organic compound and a substance showing an electron donating property to the organic compound, wherein the host material has a triplet excitation energy higher than the organometallic complex, wherein the substance showing an electron donating property to the organic compound is lithium, and wherein R