• Optoelectronics Letters
  • Vol. 17, Issue 12, 751 (2021)
Chen YANG1、2, Weiyuan GU1、2, Shuguo YU1, and Hongyan ZHANG1、2、*
Author Affiliations
  • 1Xinjiang Key Laboratory of Solid State Physics and Devices, Xinjiang University, Urumqi 830046, China
  • 2School of Physics Science and Technology, Xinjiang University, Urumqi 830046, China
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    DOI: 10.1007/s11801-021-1071-9 Cite this Article
    YANG Chen, GU Weiyuan, YU Shuguo, ZHANG Hongyan. Effect of surfactant on performance of ZnO humidity sensor[J]. Optoelectronics Letters, 2021, 17(12): 751 Copy Citation Text show less

    Abstract

    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.