文献类型：期刊文献

英文题名：Collaborative Enhancement of Humidity Sensing Performance by KCl-Doped CuO/SnO2 p-n Heterostructures for Monitoring Human Activities

作者：Wang, Lei[1,2];Huang, Feng[1,2];Yao, Xinqi[1,2];Yuan, Shuaishuai[1,2];Yu, Xinhai[1,2];Tu, Shan-Tung[1,2];Chen, Shijian[3]

机构：[1]East China Univ Sci & Technol, MOE Key Lab Pressure Syst & Safety, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[3]SUFA Technol Ind Co Ltd, CNNC, Suzhou 215001, Peoples R China

年份：2023

外文期刊名：ACS OMEGA

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000924065900001)】；

基金：? ACKNOWLEDGMENTS This work was financially supported by the National Key Research and Development Program of China [2018YFA0704604] .

语种：英文

摘要：In this study, a high-performance humidity sensor based on KCl-doped CuO/ SnO2 p-n heterostructures was fabricated by a ball milling-roasting method. The morphology and nanostructure of the fabricated KCl-CuO/SnO2 composite were characterized by scanning electron microscopy, X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy, and nitrogen sorption analysis. The results showed that the humidity sensor had a high sensitivity of 194 k omega/%RH, short response and recovery times of 1.0 and 1.5 s, a low hysteresis value, and good repeatability. The energy band structure and complex impedance spectrum of the KCl-CuO/SnO2 composite indicated that the excellent humidity sensing performance originated from the ionic conductivity of KCl, the formation of heterojunctions, the change in the Schottky barrier height, and the depletion of electronic depletion layers. The KCl-CuO/SnO2 sensor has great potential in respiratory monitoring, noncontact sensing of finger moisture, and environmental monitoring.