Patent ID: 7994711
Filing Date: 2011-08-09
Classification: H01L

Abstract:
1. A light emitting display device comprising: a light emitting element including a first electrode, a second electrode, and a layer containing a light emitting material interposed therebetween; and an auxiliary wiring which is electrically connected to the second electrode, wherein the layer containing the light emitting material includes at least a first buffer layer, a light emitting layer, and a second buffer layer, wherein the first buffer layer comprises a material having a hole transporting property, the material comprising an organic compound and any one of molybdenum oxide, vanadium oxide, ruthenium oxide, rhenium oxide, titanium oxide, chromium oxide, zirconium oxide, hafnium oxide, tantalum oxide, tungsten oxide, and silver oxide, and wherein either one or both of the first buffer layer and the second buffer layer are interposed between the auxiliary wiring and the second electrode.