%0 Journal Article
%T ZnO Nano-arrays on High Power Blue LED Chip for Enhanced Light Extraction Efficiency
%A XU Bing
%A ZHAO Jun-Liang
%A ZHANG Jian-Ming
%A SUN Xiao-Wei
%A ZHUGE Fu-Wei
%A LI Xiao-Min
%J 无机材料学报
%D 2012
%I Science Press
%R 10.3724/sp.j.1077.2012.11499
%X 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.
%K <p>ZnO nano-arrays
%K high power LED chip
%K light extraction efficiency
%K chemical solution method</p>
%U http://www.jim.org.cn/fileup/PDF/20120708.pdf