Charge-Transporting Property of Polymer Films Doped with Organic Stable Radicals

摘要

Organic light-emitting-diodes (OLEDs) have been developed for applications in a flat panel display[1]. Because the emission mechanism of the OLED is based on the recombination p9rocess of holes and electrons injected from the electrodes, the performance of the device is significantly influenced by the energy barrier at the interfaces and the balance of charges. Since Tang et al.[2] demonstrated the effectiveness of the hole transporting layer for improvement of device efficiency, various hole transporting materials have been eagerly studied.