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

Chang-Jiang Chen; Wenbin Zhu; Ju-Hung Chao; Haonan Zhou; Stuart (Shizhuo) Yin

doi:10.1117/12.2276512

23 August 2017 A two-dimensional analysis on high light extraction efficiency (LEE) LEDs with asymmetric microstructured substrate

Chang-Jiang Chen, Wenbin Zhu, Ju-Hung Chao, Haonan Zhou, Stuart (Shizhuo) Yin

Author Affiliations +

Proceedings Volume 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI; 103820F (2017) https://doi.org/10.1117/12.2276512
Event: SPIE Optical Engineering + Applications, 2017, San Diego, California, United States

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.

Citation Download Citation

Chang-Jiang Chen, Wenbin Zhu, Ju-Hung Chao, Haonan Zhou, and Stuart (Shizhuo) Yin "A two-dimensional analysis on high light extraction efficiency (LEE) LEDs with asymmetric microstructured substrate", Proc. SPIE 10382, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications XI, 103820F (23 August 2017); https://doi.org/10.1117/12.2276512

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