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Piezotronic Effect on ZnO Nanowire Film Based Temperature Sensor
journal contribution
posted on 2014-04-23, 00:00 authored by Fei Xue, Limin Zhang, Wei Tang, Chi Zhang, Weiming Du, Zhong Lin WangIn this work, we demonstrated the
first study of piezotronic effect
as a potential means for measuring temperature by utilizing ZnO nanowire
(NW) film. The film was synthesized by the wet chemical deposition
method and transferred to a flexible substrate using photoresist.
The primary role of piezotronic effect over geometrical and piezoresistive
effect in the as-fabricated devices has been confirmed, and piezotronic
effect on charge carrier transportation under different strains is
subsequently studied. In addition, we also presented that the temperature
sensing capability of as-fabricated NW film based piezotronic devices
can be tuned by piezopotential, which exhibits dramatically enhanced
sensitivity. A theoretical model is proposed to interpret the observed
behaviors of the sensor. This study provides an effective method to
fabricate temperature sensors with higher performance based on piezotronic
effect in the future.