Small polymeric nano-dot enhanced pure-white organic light-emitting diode

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• 作者：Jwo-Huei Jou ; Mao-Feng Hsu ; Wei-Ben Wang ; Chi-Ping Liu ; Zhao-Chin Wong ; Jing-Jong Shyue ; Chung-Che Chiang
• 关键词：OLED ; Efficiency ; Nano dot
• 刊名：Organic Electronics
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：9
• 期：3
• 页码：291-295
• 全文大小：377 K

文摘

Marked efficiency improvement of a spin-coated phosphorescent pure-white organic light-emitting diode was obtained by incorporating a novel small polymeric nano-dot (PND) in the hole-transporting layer. The resultant device efficiency strongly depended on the concentration and size of the PND used. The resultant power efficiency at 100 cd/m², for example, was increased from 6.8 to 23.7 lm/W, an increase of 350 % , as 14 wt % PND of 8 nm in size was employed. The improvement may be attributed to a better carrier-injection balance resulted from hole trapping on the PND.