Title :
Light extraction analysis of AlGaInP based LED with surface texture
Author :
Qin, Yuan ; Guo, Xia ; Jiang, Wen Jing ; Fang, Rong ; Di Shen, Guang
Author_Institution :
Beijing Optoelectron. Technol. Lab., Beijing Univ. of Technol., 100124, 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.
Keywords :
Analytical models; Displays; Geometrical optics; Light emitting diodes; Monte Carlo methods; Optical refraction; Ray tracing; Refractive index; Shape; Surface texture; AlGaInP; light emitting diodes; ray tracing; surface texture;
Conference_Titel :
Communications and Photonics Conference and Exhibition (ACP), 2009 Asia
Conference_Location :
Shanghai, China
Print_ISBN :
978-1-55752-877-3
Electronic_ISBN :
978-1-55752-877-3
