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Proceedings Paper

Optical modeling and light extraction of an LED with surface roughening and sharpening
Author(s): Ching-Cherng Sun; Chao-Ying Lin
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Paper Abstract

We have presented our study on optical models for simulating the light distribution of an LED and for calculating light extraction efficiency of an LED chip. In the former, we have precisely predicted the light distribution of an LED by a lens. In the latter, we have proposed to introduce a periodic sharpening structure on the interface between the sapphire and the n-GaN of a GaN-based LED to obtain as high as 73% in light extraction efficiency.

Paper Details

Date Published: 26 January 2004
PDF: 7 pages
Proc. SPIE 5187, Third International Conference on Solid State Lighting, (26 January 2004); doi: 10.1117/12.512296
Show Author Affiliations
Ching-Cherng Sun, National Central Univ. (Taiwan)
Chao-Ying Lin, National Central Univ. (Taiwan)


Published in SPIE Proceedings Vol. 5187:
Third International Conference on Solid State Lighting
Ian T. Ferguson; Nadarajah Narendran; Steven P. DenBaars; John C. Carrano, Editor(s)

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