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

被引：5

作者：

Choi, June-Heang ^{[1
]}

Park, Taehyun ^{[2
]}

Hur, Jaehyun ^{[2
]}

Cha, Ho-Young ^{[1
]}

机构：

[1] Hongik Univ, Sch Elect & Elect Engn, Seoul 04066, South Korea

[2] Gachon Univ, Dept Chem & Biol Engn, Seongnam 13120, Gyeonggi, South Korea

来源：

NANOMATERIALS | 2021年 / 11卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

AlGaN; GaN; ZnO-nanoparticles; Pd; photocatalyst; hydrogen sensor; ultraviolet; GAS-SENSING PROPERTIES; HIGH-SENSITIVITY; RECENT PROGRESS; ZNO NANORODS; THIN-FILMS; NANOPARTICLES; NANOSTRUCTURES; TIO2;

D O I：

10.3390/nano11061422

中图分类号：

O6 [化学];

学科分类号：

0703 ;

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 similar to 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.

引用

页数：10

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