Novel Device Structures of Organic Light-Emitting Diodes

Abstract

Since the first report of ultra-thin and double-layered organic light emitting devices (OLEDs) in 1987, considerable efforts have been made to improve the device characteristics for applications in flat panel displays. In general, the improvements of OLEDs have been achieved by the use of highly fluorescent materials and by the use of new device structures. Here we present a novel structure,multiphoton emission OLEDs,which can improve the device characteristics dramatically. Multiphoton emission OLEDs provide high luminance and long operational lifetime. We also introduce the multi-functional OLEDs with a new device structure.