Light extraction analysis of AlGaInP based LED with surface texture

Yuan Qin; Xia Guo; Wen Jiang Jiang; Rong Fang; Guang Di Shen

doi:10.1117/12.849978

25 November 2009 Light extraction analysis of AlGaInP based LED with surface texture

Yuan Qin, Xia Guo, Wen Jiang Jiang, Rong Fang, Guang Di Shen

Proceedings Volume 7635, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy; 763505 (2009) https://doi.org/10.1117/12.849978
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

Abstract

A Monte Carlo ray tracing method is applied to analyze the light extraction characteristics of AlGaInP based LED with various shapes of surface texture. Regular, periodic arranged structures were fabricated on p-side-up AlGaInP LEDs through dry etching. The dimension of the structures was optimized by Monte Carlo ray tracing simulation. Compared to the conventional LED, it significantly improved the performance of the chip, the light extraction efficiency was increased more than 11.5%. the enhancement is attributed to the appearance of an additional escape cone for light extraction enabled by surface texture. And it is also easy to extend the Monte Carlo ray tracing method to develop LED lamps, consisting a reflector dish and an epoxy lens.

Citation Download Citation

Yuan Qin, Xia Guo, Wen Jiang Jiang, Rong Fang, and Guang Di Shen "Light extraction analysis of AlGaInP based LED with surface texture", Proc. SPIE 7635, Display, Solid-State Lighting, Photovoltaics, and Optoelectronics in Energy, 763505 (25 November 2009); https://doi.org/10.1117/12.849978

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