Enhancing the light extraction of AlGaN-based ultraviolet light-emitting diodes in the nanoscale

Yanan Guo; Jianchang Yan; Yun Zhang; Junxi Wang; Jinmin Li

doi:10.1117/1.JNP.12.043510

6 July 2018 Enhancing the light extraction of AlGaN-based ultraviolet light-emitting diodes in the nanoscale

Yanan Guo, Jianchang Yan, Yun Zhang, Junxi Wang, Jinmin Li

Author Affiliations +

Journal of Nanophotonics, Vol. 12, Issue 4, 043510 (July 2018). https://doi.org/10.1117/1.JNP.12.043510

Abstract

AlGaN-based ultraviolet light-emitting diodes (UV LEDs) are promising next-generation UV sources for a wide variety of applications. The state-of-the-art AlGaN-based UV LEDs exhibit much lower output power and external quantum efficiency than highly commercialized GaN visible LEDs. One key issue for UV LEDs is the poor light-extraction efficiency. We have reviewed the recent progress in the light extraction approaches for AlGaN-based UV LEDs, including the highly reflective techniques, and the surface/interface modification for total internal reflection mitigating. Moreover, AlGaN-based UV LEDs in the nanoscale structures, such as nanopillar, nanorod, and nanowire structures, are also discussed.

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Yanan Guo, Jianchang Yan, Yun Zhang, Junxi Wang, and Jinmin Li "Enhancing the light extraction of AlGaN-based ultraviolet light-emitting diodes in the nanoscale," Journal of Nanophotonics 12(4), 043510 (6 July 2018). https://doi.org/10.1117/1.JNP.12.043510

Received: 15 April 2018; Accepted: 14 June 2018; Published: 6 July 2018

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