Far-UVC emission of polarity-engineered AlGaN MQW using carbon nanotube-based cold cathode electron beam

Uiho Choi; Sung Tae Yoo; Minho Kim; Byeongchan So; Changheon Cheon; Mino Yang; Moonsang Lee; Kyu Chang Park; Okhyun Nam

doi:10.1063/5.0122697

Far-UVC emission of polarity-engineered AlGaN MQW using carbon nanotube-based cold cathode electron beam

Uiho Choi, Sung Tae Yoo, Minho Kim, Byeongchan So, Changheon Cheon, Mino Yang, Moonsang Lee, Kyu Chang Park, Okhyun Nam

Research output: Contribution to journal › Article › peer-review

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Abstract

Far-ultraviolet-C (UVC) light is an efficient and safe germicide because the wavelength band eradicates viruses but is harmless to human cells. In this study, electron-beam-pumped AlGaN emitters have been introduced as an alternative to far-UVC light emitting diodes which are limited by certain drawbacks, such as low conductivity and light absorption of the p-layer and side emission due to polarization at short wavelengths. We demonstrate a highly efficient far-UVC AlGaN emitter using a carbon nanotube-based cold cathode electron beam (C-beam). To maximize light emission, materials were grown via novel in situ lateral polarity engineering epitaxy. The C-beam enables the large-area emission of up to 528 mm2, and the maximum power conversion efficiency is 0.5% at 232 nm.

Original language	English
Article number	091104
Journal	Applied Physics Letters
Volume	122
Issue number	9
DOIs	https://doi.org/10.1063/5.0122697
Publication status	Published - 27 Feb 2023

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abstract = "Far-ultraviolet-C (UVC) light is an efficient and safe germicide because the wavelength band eradicates viruses but is harmless to human cells. In this study, electron-beam-pumped AlGaN emitters have been introduced as an alternative to far-UVC light emitting diodes which are limited by certain drawbacks, such as low conductivity and light absorption of the p-layer and side emission due to polarization at short wavelengths. We demonstrate a highly efficient far-UVC AlGaN emitter using a carbon nanotube-based cold cathode electron beam (C-beam). To maximize light emission, materials were grown via novel in situ lateral polarity engineering epitaxy. The C-beam enables the large-area emission of up to 528 mm2, and the maximum power conversion efficiency is 0.5% at 232 nm.",

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AU - Choi, Uiho

AU - Yoo, Sung Tae

AU - Kim, Minho

AU - So, Byeongchan

AU - Cheon, Changheon

AU - Yang, Mino

AU - Lee, Moonsang

AU - Park, Kyu Chang

AU - Nam, Okhyun

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AB - Far-ultraviolet-C (UVC) light is an efficient and safe germicide because the wavelength band eradicates viruses but is harmless to human cells. In this study, electron-beam-pumped AlGaN emitters have been introduced as an alternative to far-UVC light emitting diodes which are limited by certain drawbacks, such as low conductivity and light absorption of the p-layer and side emission due to polarization at short wavelengths. We demonstrate a highly efficient far-UVC AlGaN emitter using a carbon nanotube-based cold cathode electron beam (C-beam). To maximize light emission, materials were grown via novel in situ lateral polarity engineering epitaxy. The C-beam enables the large-area emission of up to 528 mm2, and the maximum power conversion efficiency is 0.5% at 232 nm.

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Far-UVC emission of polarity-engineered AlGaN MQW using carbon nanotube-based cold cathode electron beam

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