@article{Hu2014, 
author = {Guofeng Hu and Ranran Zhou and Ruomeng Yu and Lin Dong and Caofeng Pan and Zhong Lin Wang},
title = {Piezotronic effect enhanced Schottky-contact ZnO micro/nanowire humidity sensors},
year = {2014},
journal = {Nano Research},
volume = {7},
number = {7},
pages = {1083-1091},
keywords = {piezotronic effect, humidity sensor, ZnO micro/nanowire, Schottky contact},
url = {https://www.sciopen.com/article/10.1007/s12274-014-0471-6},
doi = {10.1007/s12274-014-0471-6},
abstract = {A ZnO micro/nanowire has been utilized to fabricate Schottky-contacted humidity sensors based on a metal–semiconductor–metal (M–S–M) structure. By means of the piezotronic effect, the signal level, sensitivity and sensing resolution of the humidity sensor were significantly enhanced when applying an external strain. Since a higher Schottky barrier markedly reduces the signal level, while a lower Schottky barrier decreases the sensor sensitivity due to increased ohmic transport, a 0.22% compressive strain was found to optimize the performance of the humidity sensor, with the largest responsivity being 1, 240%. The physical mechanism behind the observed mechanical–electrical behavior was carefully studied by using band structure diagrams. This work provides a promising way to significantly enhance the overall performance of a Schottky-contact structured micro/nanowire sensor.}
}