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Communication

Room Temperature Operation of UV Photocatalytic Functionalized AlGaN/GaN Heterostructure Hydrogen Sensor

1
School of Electronic and Electrical Engineering, Hongik University, Seoul 04066, Korea
2
Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Gyeonggi, Korea
*
Authors to whom correspondence should be addressed.
Academic Editor: Gabriella Caminati
Nanomaterials 2021, 11(6), 1422; https://doi.org/10.3390/nano11061422
Received: 13 April 2021 / Revised: 21 May 2021 / Accepted: 25 May 2021 / Published: 28 May 2021
(This article belongs to the Special Issue Nanosensors)
An AlGaN/GaN heterostructure based hydrogen sensor was fabricated using a dual catalyst layer with ZnO-nanoparticles (NPs) atop of Pd catalyst film. The ZnO-NPs were synthesized to have an average diameter of ~10 nm and spin coated on the Pd catalyst layer. Unlike the conventional catalytic reaction, the fabricated sensors exhibited room temperature operation without heating owing to the photocatalytic reaction of the ZnO-NPs with ultraviolet illumination at 280 nm. A sensing response of 25% was achieved for a hydrogen concentration of 4% at room temperature with fast response and recovery times; a response time of 8 s and a recovery time of 11 s. View Full-Text
Keywords: AlGaN/GaN; ZnO-nanoparticles; Pd; photocatalyst; hydrogen sensor; ultraviolet AlGaN/GaN; ZnO-nanoparticles; Pd; photocatalyst; hydrogen sensor; ultraviolet
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MDPI and ACS Style

Choi, J.-H.; Park, T.; Hur, J.; Cha, H.-Y. Room Temperature Operation of UV Photocatalytic Functionalized AlGaN/GaN Heterostructure Hydrogen Sensor. Nanomaterials 2021, 11, 1422. https://doi.org/10.3390/nano11061422

AMA Style

Choi J-H, Park T, Hur J, Cha H-Y. Room Temperature Operation of UV Photocatalytic Functionalized AlGaN/GaN Heterostructure Hydrogen Sensor. Nanomaterials. 2021; 11(6):1422. https://doi.org/10.3390/nano11061422

Chicago/Turabian Style

Choi, June-Heang, Taehyun Park, Jaehyun Hur, and Ho-Young Cha. 2021. "Room Temperature Operation of UV Photocatalytic Functionalized AlGaN/GaN Heterostructure Hydrogen Sensor" Nanomaterials 11, no. 6: 1422. https://doi.org/10.3390/nano11061422

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