Patent ID: 8304097

Claim:
A white organic light emitting device comprising an anode, a cathode and an organic layer disposed between opposing surfaces of the anode and the cathode, the organic layer comprising a first blue emissive layer, a first spacer layer disposed on a surface of the first blue emissive layer, a first green emissive layer disposed on a surface of the first spacer layer opposite the first blue emissive layer, a red emissive layer disposed on a surface of the first green emissive layer opposite the first spacer layer, a second green emissive layer disposed on a surface of the red emissive layer opposite the first green emissive layer, a second spacer layer disposed on a surface of the second green emissive layer opposite the red emissive layer, and a second blue emissive layer formed on a surface of the second spacer layer opposite the second green emissive layer, in this order from a surface of the anode, wherein each of the first and second blue emissive layers comprises a host material and a fluorescent dopant, the first and second green emissive layers and the red emissive layer each comprise a host material, and each of the first and second spacer layers consists essentially of a host material.