High-performance self-powered/active humidity sensing of Fe-doped ZnO nanoarray nanogenerator

High performance self-powered/active humidity sensors have been fabricated from Fe-doped ZnO nanoarrays. When the relative humidity (RH) is 60% at room temperature, the piezoelectric output voltage of the humidity sensor under compressive force decreases from 0.85 (at 5% RH) to 0.21V. The self-power...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2015-07, Vol.213, p.382-389
Main Authors: Zhu, Dan, Hu, Tianxiang, Zhao, Yayu, Zang, Weili, Xing, Lili, Xue, Xinyu
Format: Article
Language:English
Subjects:
Actuators
Detection
Fe-doped ZnO
Humidity
Humidity sensor
Nanogenerator
Nanostructure
Piezoelectricity
Self-powered
Sensors
Voltage
Zinc oxide
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Summary:High performance self-powered/active humidity sensors have been fabricated from Fe-doped ZnO nanoarrays. When the relative humidity (RH) is 60% at room temperature, the piezoelectric output voltage of the humidity sensor under compressive force decreases from 0.85 (at 5% RH) to 0.21V. The self-powered humidity sensing performance of Fe-doped ZnO nanoarrays is much higher than that of undoped ZnO nanoarrays. Fe3+ ions have small ionic radius and many positive charges (+3), thus the doping of Fe can lead to a high charge density, which can probably result in a large amount of adsorbed water molecules on the surface of Fe-doped ZnO NWs, enhancing the screening effect and decreasing the piezoelectric output. The present results demonstrate a new material system for high-performance self-powered/active humidity sensors.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2015.02.119