Light extraction efficiency enhancement of 265nm UVC-LED with Micro-array structure
It is well known that DUV-LED with AlGaN-based has a wavelength ranging from 200 to 300 nm is major adopted with an inorganic hermetic packaging technology.Importantly,silica glass can prevent ultraviolet aging and apply to hermetic package at the same time.However,compared to the bare-chip packaging,quartz will give rise to Fresnel reflection losses because of the difference refractive index between the air and the silica glass,which reduces the luminous flux of the UVC-LED.Therefore,it is urgent to search for a method to reduce the reflection losses and to increase the UVC luminous flux.In this paper,several micro-processing methods for quartz lenses are proposed.The Monte-Carlo method is used to trace ultraviolet light rays,and numerical simulations are performed based on the rigorous coupled wave analysis method.Analyze the effects of different array micro-processing structures on UV light.The results show that single-sided micro-processing arrays has a significant increase in the intensity of 265 nm UVC-LED.As the size of micro-processing in inner quartz increases,the lens has an enhancement effect on ultraviolet light.In addition,micro-processing can enhance the concentration of light and increase the intensity of ultraviolet effectively light.
Fresnel reflection losses luminous flux UVC-LED Monte-Carlo method
Lei Wang Daoguo Yang Xiyou Wang Zhangping Yang Miao Cai
Guangxi Key Laboratory of Manufacturing System & Advanced Manufacturing Technology School of Mechanism and Electrical Engineering Guilin University of Electronic Technology Guilin,China
国际会议
上海
英文
823-827
2018-08-08（万方平台首次上网日期，不代表论文的发表时间）