High efficiency low operating voltage polymer light-emitting diodes with aluminum cathode

被引：94
作者：
Deng, XY
Lau, WM
Wong, KY [1 ]
Low, KH
Chow, HF
Cao, Y
机构：
[1] Chinese Univ Hong Kong, Dept Phys, Shatin, Hong Kong, Peoples R China
[2] Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China
[3] S China Univ Technol, Inst Polymer Optoelect Mat & Devices, Guangzhou 510640, Peoples R China
来源：
APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 18期
关键词：
D O I：
10.1063/1.1739510
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
By blending poly(ethylene glycol) (PEG) into an electroluminescence (EL) polymer, significantly enhanced EL efficiency in a polymer light-emitting diode (PLED) with aluminum electrode was achieved. An orange-color-emitting PLED with 10 wt % PEG blending achieved device efficiencies exceeding 2.6 cd/A for a wide range of bias voltage, which is more than two orders of magnitude higher than that of a similar PLED without the PEG blending. The enhanced efficiency was a result of the reduction of electron injection barrier height at the cathode-polymer interface. It is believed that interfacial interaction that is specific to Al plays an important role in the enhancement mechanism. (C) 2004 American Institute of Physics.
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页码：3522 / 3524
页数：3
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