Highly efficient blue phosphorescent polymer light-emitting diodes by using interfacial modification

被引：12
作者：
Li, Lu [1 ,2 ,3 ]
Liu, Jun [1 ,2 ]
Yu, Zhibin [1 ,2 ]
Pei, Qibing [1 ,2 ]
机构：
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Sch Engn, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Appl Sch, Los Angeles, CA 90095 USA
[3] Univ Elect Sci & Technol China, Dept Optoelect, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2011年 / 98卷 / 20期
基金：
美国国家科学基金会;
关键词：
CONJUGATED POLYMERS; ELECTROPHOSPHORESCENT DEVICES; ALUMINUM CATHODE; PERFORMANCE; EMISSION; LAYER;
D O I：
10.1063/1.3593380
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Solution processed highly efficient blue electrophosphorescent polymer light-emitting diodes have been fabricated containing an oligo(ethylene oxide) (PEO-DME) additive to enhance the electroluminescence efficiency. The addition of PEO-DME at 5-10 wt % effectively lowers both the electron and hole injection barriers. The maximum current efficiency obtained was 26.5 cd/A at an emission brightness of 2500 cd/m(2). The high performance is due to (i) improved charge carrier injection at the interface resulting from specific interfacial interactions between PEO-DME and aluminum and (ii) improved charge carrier transporting ability and high electric field resulting from PEO-DME doping. (C) 2011 American Institute of Physics. [doi:10.1063/1.3593380]
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页数：3
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