
Proceedings Paper
High light extraction efficiency LEDs with asymmetric obtuse angle micro-structured roofsFormat | Member Price | Non-Member Price |
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Paper Abstract
This study reports a high light extraction efficiency (LEE) light emitting diode (LED) by harnessing asymmetric obtuse
angle micro-structured roofs. In comparison to conventional symmetric micro-structured roofs, the LEE has been
improved from 62% to 73%. This represents an 11% improvement in LEE, which is significant for LED. It is
speculated that this improvement is largely due to the increased surface area and better randomization on the direction of
transmitted/reflected light, which enhances the escaping probability after multiple reflections.
Paper Details
Date Published: 15 September 2016
PDF: 7 pages
Proc. SPIE 9958, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X, 99580T (15 September 2016); doi: 10.1117/12.2239962
Published in SPIE Proceedings Vol. 9958:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X
Shizhuo Yin; Ruyan Guo, Editor(s)
PDF: 7 pages
Proc. SPIE 9958, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X, 99580T (15 September 2016); doi: 10.1117/12.2239962
Show Author Affiliations
Chang-Jiang Chen, The Pennsylvania State Univ. (United States)
Ju-Hung Chao, The Pennsylvania State Univ. (United States)
Ju-Hung Chao, The Pennsylvania State Univ. (United States)
Wenbin Zhu, The Pennsylvania State Univ. (United States)
Stuart Yin, The Pennsylvania State Univ. (United States)
Stuart Yin, The Pennsylvania State Univ. (United States)
Published in SPIE Proceedings Vol. 9958:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications X
Shizhuo Yin; Ruyan Guo, Editor(s)
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