Patent 7279705 was granted and assigned to AU Optronics on October, 2007 by the United States Patent and Trademark Office.
An organic light-emitting device is provided, comprising a bottom electrode, at least two emissive units disposed on the bottom electrode, at least one charge-generation layer disposed between two adjacent emissive units, and a top electrode disposed on the emissive units. The charge-generation layer comprises fullerene or a derivative thereof, and generates and transports electrons and holes.