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

Nanomaterials

Taehyun Park¹  Jaehyun Hur¹  June-Heang Choi²  Ho-Young Cha² 

[1] Department of Chemical and Biological Engineering, Gachon University, Seongnam 13120, Gyeonggi, Korea;School of Electronic and Electrical Engineering, Hongik University, Seoul 04066, Korea;

关键词: AlGaN/GaN;    ZnO-nanoparticles;    Pd;    photocatalyst;    hydrogen sensor;    ultraviolet;   

DOI  :  10.3390/nano11061422

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown