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

Volume

2009-Supplement

fYear

2009

fDate

2-6 Nov. 2009

Firstpage

1

Lastpage

7

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;

fLanguage

English

Publisher

ieee

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

Type

conf

Filename

5405547