Far-UVC emission of polarity-engineered AlGaN MQW using carbon nanotube-based cold cathode electron beam-Reference-Cited by-同舟云学术

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

Published:2023-02-27 Issue:9 Volume:122 Page:
ISSN:0003-6951
Container-title:Applied Physics Letters
language:en
Short-container-title:

Author:

Choi Uiho¹^ORCID,Yoo Sung Tae²^ORCID,Kim Minho¹,So Byeongchan³^ORCID,Cheon Changheon¹,Yang Mino⁴,Lee Moonsang⁵,Park Kyu Chang²^ORCID,Nam Okhyun¹^ORCID

Affiliation:

1. Department of Nano & Semiconductor Engineering, Tech University of Korea 1 , 237, Sangidaehak-ro, Siheung-si, Gyeonggi-do, Republic of Korea

2. Department of Information Display, Kyung Hee University 2 , Dongdaemun-gu, Seoul 02447, Republic of Korea

3. Institute for Photon Science and Synchrotron Radiation, Karlsruhe Institute of Technology 3 , D-76344 Eggenstein-Leopoldshafen, Germany

4. Korea Basic Science Institute Seoul 4 , Seoul 02841, Republic of Korea

5. Department of Materials Science and Engineering, Inha University 5 , 100 Inharo, Namgu, Incheon 22212, Republic of Korea

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.

Funder

National Research Foundation of Korea

Publisher

AIP Publishing

Subject

Physics and Astronomy (miscellaneous)

Link

https://pubs.aip.org/aip/apl/article-pdf/doi/10.1063/5.0122697/16784057/091104_1_online.pdf

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