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A two-dimensional analysis on high light extraction efficiency (LEE) LEDs with asymmetric microstructured substrate
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Paper Abstract

This paper presents a quantitative two-dimensional (2D) analysis on high power GaN light emitting diodes (LEDs) fabricated on asymmetric micro-structured substrates. It is found that the light extraction efficiency (LEE) can be substantially improved from conventional symmetric structure to asymmetric structure. The increase of LEE is mainly dedicated to the increased surface area and better randomization on the direction of transmitted/reflected light, which enhances the escaping probability after multiple reflections. This quantitative 2D analysis lays down a solid foundation for the future quantitative 3D analysis.

Paper Details

Date Published: 23 August 2017
PDF: 5 pages
Proc. SPIE 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI, 103820F (23 August 2017); doi: 10.1117/12.2276512
Show Author Affiliations
Chang-Jiang Chen, The Pennsylvania State Univ. (United States)
Wenbin Zhu, The Pennsylvania State Univ. (United States)
Ju-Hung Chao, The Pennsylvania State Univ. (United States)
Haonan Zhou, The Pennsylvania State Univ. (United States)
Shizhuo Yin, The Pennsylvania State Univ. (United States)


Published in SPIE Proceedings Vol. 10382:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI
Shizhuo Yin; Ruyan Guo, Editor(s)

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