High-Efficiency E-Beam Pumped Deep-Ultraviolet Surface Emitter Based on AlGaN Ultra-Thin Staggered Quantum Wells

Yixin Wang, Ye Yuan, Renchun Tao, Shangfeng Liu, Tao Wang, Shanshan Sheng, Patrick Quach, C. M. Manoj Kumar, Zhaoying Chen, Fang Liu, Xin Rong, Peng Jin, Mengyang Feng, Hongwei Li, Shiping Guo, Weikun Ge, June Key Lee, Bo Shen, Xinqiang Wang*

*Corresponding author for this work

Research output: Contribution to journalJournal Articlepeer-review

7 Citations (Scopus)

Abstract

A 2-inch wafer-scale electron-beam (e-beam) pumped deep-ultraviolet surface emitter (DUVSE) with high efficiency and high output power at an emission wavelength of 248 nm is reported. This DUVSE benefits from ultra-thin staggered AlN/AlGaN/GaN multiple quantum wells (MQWs), which compromise the electron–hole overlap and carrier confinement and thus significantly improve the emission efficiency. The wall-plug-efficiency (WPE) is increased by six times to 5.25% in comparison to that of conventional DUV light-emitting devices (LEDs) based on AlGaN MQWs. This WPE is achieved under an anode voltage and current of 8 kV and 1 mA, where the output power is 420 mW. This output power can be further enhanced to 702 mW by increasing the anode current to 3 mA. The enhanced WPE and uniform electron beam distribution lighten the avenue to achieve a wafer-scale high power dense DUV light source, which is a challenge for conventional DUV-LEDs, in particular with an emission wavelength of less than 250 nm.

Original languageEnglish
Article number2200011
JournalAdvanced Optical Materials
Volume10
Issue number18
DOIs
Publication statusPublished - 19 Sept 2022
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Keywords

  • deep ultraviolet
  • high output power
  • metal-organic chemical vapor deposition
  • ultra-thin multiple quantum wells

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