Optoelectronics Letters, Volume. 17, Issue 12, 751(2021)
Effect of surfactant on performance of ZnO humidity sensor
In this study, using surfactant monoethanolamine (MEA), zinc oxide (ZnO)-MEA humidity sensor based on ZnO was successfully prepared by hydrothermal method. MEA makes the surface of the ZnO-MEA have more oxygen vacancy and hydrophilic functional groups, which improves the performance of ZnO humidity sensor. ZnO-MEA achieved a change of 4 orders of magnitude at room temperature in the relative humidity (RH) from 11% to 95%, and it shows better linearity, shorter response/recovery time (20 s/15.9 s), smaller humidity lag and long-term stability. In addition, the distribution of ZnO-MEA particles is more uniform and provides more active sites for adsorption of water molecules to enhance humidity sensing performance.
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YANG Chen, GU Weiyuan, YU Shuguo, ZHANG Hongyan. Effect of surfactant on performance of ZnO humidity sensor[J]. Optoelectronics Letters, 2021, 17(12): 751
Received: May. 4, 2021
Accepted: Jun. 27, 2021
Published Online: Jan. 10, 2022
The Author Email: Hongyan ZHANG (zhanghyxj@163.com)