Research Progress of AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

Ruiqiang Xu; Qiushi Kang; Youwei Zhang; Xiaoli Zhang; Zihui Zhang

doi:10.3390/mi14040844

Micromachines (Apr 2023)

Research Progress of AlGaN-Based Deep Ultraviolet Light-Emitting Diodes

Ruiqiang Xu,
Qiushi Kang,
Youwei Zhang,
Xiaoli Zhang,
Zihui Zhang

Affiliations

Ruiqiang Xu: Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Physics and Opto-Electronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
Qiushi Kang: School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China
Youwei Zhang: Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Physics and Opto-Electronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
Xiaoli Zhang: Guangdong Provincial Key Laboratory of Information Photonics Technology, School of Physics and Opto-Electronic Engineering, Guangdong University of Technology, Guangzhou 510006, China
Zihui Zhang: School of Integrated Circuits, Guangdong University of Technology, Guangzhou 510006, China

DOI: https://doi.org/10.3390/mi14040844
Journal volume & issue: Vol. 14, no. 4
p. 844

Abstract

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AlGaN-based deep ultraviolet light-emitting diodes (DUV LEDs) have great application prospects in sterilization, UV phototherapy, biological monitoring and other aspects. Due to their advantages of energy conservation, environmental protection and easy miniaturization realization, they have garnered much interest and been widely researched. However, compared with InGaN-based blue LEDs, the efficiency of AlGaN-based DUV LEDs is still very low. This paper first introduces the research background of DUV LEDs. Then, various methods to improve the efficiency of DUV LED devices are summarized from three aspects: internal quantum efficiency (IQE), light extraction efficiency (LEE) and wall-plug efficiency (WPE). Finally, the future development of efficient AlGaN-based DUV LEDs is proposed.

Published in Micromachines

ISSN: 2072-666X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mechanical engineering and machinery
Website: https://www.mdpi.com/journal/micromachines

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