Patent ID: 7914906

Claim:
An organic electro-luminescence device, comprising: a substrate; a first electrode layer formed over the substrate; a hole injecting layer formed over the first electrode layer; a hole transporting layer formed over the hole injecting layer, wherein the hole transporting layer is made of diamine derivative; a light emitting layer formed over the hole transporting layer; an electron transporting layer, formed over the light emitting layer, having carbazole derivative and n-type material, wherein the carbazole derivative is selected from the group consisting of 2,2′-dimethyl-4,4′-N,N′-dicarbazole-biphenyl (CDBP), and 9-ethyl-3(triphenylsilyl)carbazole; an electron injecting layer formed over the electron transporting layer; and a second electrode layer formed over the electron injecting layer.