ZnO Nano-arrays on High Power Blue LED Chip for Enhanced Light Extraction Efficiency

被引：0
|
作者：
Xu Bing [1 ]
Zhao Jun-Liang [1 ]
Zhang Jian-Ming [1 ]
Sun Xiao-Wei [1 ]
Zhuge Fu-Wei [2 ]
Li Xiao-Min [2 ]
机构：
[1] Tianjin Univ, Sch Sci, Dept Appl Phys, Tianjin Key Lab Low Dimens Mat Phys & Preparing T, Tianjin 300072, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China
来源：
JOURNAL OF INORGANIC MATERIALS | 2012年 / 27卷 / 07期
基金：
中国国家自然科学基金;
关键词：
ZnO nano-arrays; high power LED chip; light extraction efficiency; chemical solution method;
D O I：
10.3724/SP.J.1077.2012.11499
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
ZnO nano-arrays were grown on high power GaN blue LED chip by low-cost chemical solution methods, which aimed to enhance the light extraction efficiency of LED chip. Various morphology was achieved by adjusting the concentration of ammonia and Zn2+ in the growth solution. With different growth solution, ZnO nano-arrays exhibited different morphologies and densities. The effect of nano-array morphology on the light extraction performance of the ZnO nano-array coated LED chip were studied. The mechanism of light extraction efficiency enhancement by nano-arrays was also discussed based on the experimental results. The result shows that ZnO nano-arrays with higher density and cone-shaped morphology are favorable for the improvement of light extraction in LED chip. ZnO nano-arrays grown at the optimum conditions can enhance the light extraction of LED chip by more than 60%. Meanwhile, ZnO nano-arrays have no significant effect on the electrical properties and electroluminescence stability of LED chip.
引用
收藏
页码：716 / 720
页数：5
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