Patent ID: 7960038
Filing Date: 2011-06-14
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. A light emitting device comprising: a light emitting layer between a first electrode and a second electrode; a hole transporting layer between the first electrode and the light emitting layer wherein the hole transporting layer contacts with the light emitting layer; an electron transporting layer between the second electrode and the light emitting layer wherein the electron transporting layer contacts with the light emitting layer; and a mixed layer between the electron transporting layer and the second electrode wherein the mixed layer includes an electron transporting substance and a substance showing an electron donating property with respect to the electron transporting substance, wherein the light emitting layer includes an organometallic complex represented in General Formula (1) and a host, wherein R1 and R2 each represent an electron-withdrawing group, R3 and R4 each represent any one of hydrogen or an alkyl group having 1 to 4 carbon atoms, L represents a monoanionic ligand, and wherein the mixing layer is not in contact with the light emitting layer.