Ultraviolet electroluminescence from ZnO/polymer heterojunction light-emitting diodes

被引：368
|
作者：
Könenkamp, R [1 ]
Word, RC [1 ]
Godinez, M [1 ]
机构：
[1] Portland State Univ, Dept Phys, Portland, OR 97201 USA
来源：
NANO LETTERS | 2005年 / 5卷 / 10期
关键词：
D O I：
10.1021/nl051501r
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
We report ultraviolet electroluminescence at 390 nm from diode structures consisting of electrodeposited ZnO nanorods sandwiched between a transparent SnO2 film and a p-type conducting polymer. The nanorods are embedded in an insulating polystyrene layer. ZnO deposition occurs at 90 degrees C and produces vertically oriented nanorods with very high uniformity over areas of, similar to 20 cm(2). Electron diffraction shows the nanorods to be single crystalline wurtzite ZnO. As-grown films show a broad electroluminescence band over the visible spectrum. Annealing at moderate temperatures (T = 300 degrees C) increases the emission and strongly raises the excitonic contribution. Optimally processed films show a narrow ultraviolet electroluminescence line at similar to 390 nm.
引用
收藏
页码：2005 / 2008
页数：4
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