Highly efficient organic light-emitting diodes with a silole-based compound

被引:212
作者
Chen, HY
Lam, WY
Luo, JD
Ho, YL
Tang, BZ
Zhu, DB
Wong, M [1 ]
Kwok, HS
机构
[1] Hong Kong Univ Sci & Technol, Dept Elect & Elect Engn, Ctr Display Res, Clear Water Bay, Hong Kong, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Chem, Clear Water Bay, Hong Kong, Peoples R China
[3] Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
关键词
D O I
10.1063/1.1495542
中图分类号
O59 [应用物理学];
学科分类号
摘要
Efficient light emission was obtained in a silole-based organic light-emitting diode. A high luminous current efficiency of 20 cd/A, corresponding to an external quantum efficiency of 8%, was achieved. The apparent violation of the upper theoretical limit of 5.5% for the external quantum efficiency of a singlet emitter is discussed. With a suitably designed cathode, a high power efficiency of similar to14 lm/W was obtained. A strong dependence of the power efficiency on the thickness of Alq(3) layer is also observed and explained. (C) 2002 American Institute of Physics.
引用
收藏
页码:574 / 576
页数:3
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