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

ABSTRACT: 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 kΩ/%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,

SUBMITTER: Wang L 

PROVIDER: S-EPMC9909783 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature