Improvement of light efficiency of GaN-based LED with ITO surface micro structure roughness
Journal of Tianjin Polytechnic University(2012)
摘要
Aiming at the problem of analyzing quantitatively the effect of the size and shap of LED surface roughness on light efficiency,the luminous efficiency and optical field of traditional LED and four LEDS with different surface roughness are simulated using the method of Monte-carlo ray tracing by lighttools software.The results show that the optimal roughening structure size can increase the luminous efficiency to 70%,which study has much reference value and instructive significance for improving the luminous efficiency.
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关键词
external quantum efficiency,micro structure,surface roughen,luminous efficiency
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