Conjugated Zwitterionic Polyelectrolyte as the Charge Injection Layer for High-Performance Polymer Light-Emitting Diodes

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• 作者：Junfeng Fang ; Bodo H. Wallikewitz ; Feng Gao ; Guoli Tu ; Christian M眉ller ; Giuseppina Pace ; Richard H. Friend ; Wilhelm T. S. Huck
• 刊名：Journal of the American Chemical Society
• 出版年：2011
• 出版时间：February 2, 2011
• 年：2011
• 卷：133
• 期：4
• 页码：683-685
• 全文大小：716K
• 年卷期：v.133,no.4(February 2, 2011)
• ISSN：1520-5126

文摘

A new zwitterionic conjugated polyelectrolyte without free counterions has been used as an electron injection material in polymer light-emitting diodes. Both the efficiency and maximum brightness were considerably improved in comparison with standard Ca cathode devices. The devices showed very fast response times, indicating that the improved performance is, in addition to hole blocking, due to dipoles at the cathode interface, which facilitate electron injection.