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Proceedings Paper

Enhancement of angular flux utilization and light extraction efficiency based on micro array in GaN LEDs
Author(s): Ching-Cherng Sun; Shang-Yu Tsai; Tsung-Xian Lee; Wei-Ting Chien
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Paper Abstract

In this paper, based on Monte Carlo ray tracing we simulate light extraction efficiency and directionality of the light pattern of GaN LEDs implanted with micro-pyramid structure with or without lens encapsulation. We have shown that micro-pyramid structures at some specific slanted angles in the LEDs are useful to increase effective flux utilization through enhancement of both the directionality and light extraction efficiency.

Paper Details

Date Published: 24 February 2010
PDF: 5 pages
Proc. SPIE 7617, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV, 76170A (24 February 2010); doi: 10.1117/12.843436
Show Author Affiliations
Ching-Cherng Sun, National Central Univ. (Taiwan)
Shang-Yu Tsai, National Central Univ. (Taiwan)
Tsung-Xian Lee, National Central Univ. (Taiwan)
Wei-Ting Chien, National Central Univ. (Taiwan)


Published in SPIE Proceedings Vol. 7617:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XIV
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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