Decoration of CuO NWs Gas Sensor with ZnO NPs for Improving NO2 Sensing Characteristics

被引：47

作者：

Han, Tae-Hee ^{[1
]}

Bak, So-Young ^{[2
]}

Kim, Sangwoo ^{[1
]}

Lee, Se Hyeong ^{[2
]}

Han, Ye-Ji ^{[1
]}

Yi, Moonsuk ^{[2
]}

机构：

[1] Pusan Natl Univ, Dept Smart Interdisciplinary Engn, Busan 46241, South Korea

[2] Pusan Natl Univ, Dept Elect Engn, Busan 46241, South Korea

来源：

SENSORS | 2021年 / 21卷 / 06期

基金：

新加坡国家研究基金会;

关键词：

gas sensors; CuO; nanowires; ZnO NPs; sol-gel; heterojunction; NANOWIRES; NANORODS; DESIGN;

D O I：

10.3390/s21062103

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper introduces a method for improving the sensitivity to NO2 gas of a p-type metal oxide semiconductor gas sensor. The gas sensor was fabricated using CuO nanowires (NWs) grown through thermal oxidation and decorated with ZnO nanoparticles (NPs) using a sol-gel method. The CuO gas sensor with a ZnO heterojunction exhibited better sensitivity to NO2 gas than the pristine CuO gas sensor. The heterojunction in CuO/ZnO gas sensors caused a decrease in the width of the hole accumulation layer (HAL) and an increase in the initial resistance. The possibility to influence the width of the HAL helped improve the NO2 sensing characteristics of the gas sensor. The growth morphology, atomic composition, and crystal structure of the gas sensors were analyzed using field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy, and X-ray diffraction, respectively.

引用

页码：1 / 11

页数：11

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