Patent ID: 7956526

Claim:
An organic electro-luminescence device, comprising: an anode; a cathode having a calcium electrode and an aluminum electrode adjacent thereto; an organic light emitting layer disposed between the anode and the calcium electrode, wherein materials of the organic light emitting layer comprise a polymer, a phosphorescence dopant, and an organic electron-transporting material, and a ratio of contents of the organic electron-transporting material in the organic light emitting layer to contents of the polymer in the organic light emitting layer is between 0.1 and 1, and a ratio of contents of the phosphorescence dopant to contents of the polymer in the organic light emitting layer is substantially equal to 0.1, and the organic electron-transporting material is 1,3-bis(N,Nt-butyl-phenyl)-1,3,4-oxadiazole; and a hole-transporting layer disposed between the organic light emitting layer and the anode.