Patent ID: 8586968
Filing Date: 2013-11-19
Classification: H01L

Abstract:
1. An organic light emitting device comprising a first electrode, a second electrode, and at least two organic material layers interposed therebetween, including a light emitting layer, wherein the organic material layers comprise at least one layer of a hole injecting layer, a hole transporting layer and a hole injecting and transporting layer, wherein the at least one hole injecting layer, hole transporting layer and hole injecting and transporting layer comprises both a material with a HOMO energy level of −4 eV or less, and a material with a LUMO energy level of −4 eV or less, wherein the material with a HOMO energy level of −4 eV or less and the material with a LUMO energy level of −4 eV or less are mixed in a ratio which leads to a higher drive voltage than the drive voltage in the case of each material alone, and wherein the thickness of the layer comprising the material with a HOMO energy level of −4 eV or less and the material with a LUMO energy level of −4 eV or less is 10 nm to 60 nm.