High sensitivity,fast speed and self-powered ultraviolet photodetectors based on ZnO micro/nanowire networks

High sensitivity,fast speed and self-powered ultraviolet photodetectors based on ZnO micro/nanowire networks

Ultraviolet(UV) photodetectors(PDs) based on ZnO micro/nanowire(MNW) networks with Pt contacts have been fabricated on glass substrates. The PDs exhibited a high photosensitivity(5 103) for 365 nm UV light with a fast recovery time(0.2 s) at a reverse bias voltage of 2 V. The light induced modulatio...

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Veröffentlicht in:Progress in natural science 2014-02, Vol.24 (1), p.1-5
Hauptverfasser: Bai, Zhiming, Yan, Xiaoqin, Chen, Xiang, Zhao, Kun, Lin, Pei, Zhang, Yue
Format: Artikel
Sprache:eng
Schlagworte:
Network
Photodetector
Response
Response time
Sensitivity
time
ZnO
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Zusammenfassung:Ultraviolet(UV) photodetectors(PDs) based on ZnO micro/nanowire(MNW) networks with Pt contacts have been fabricated on glass substrates. The PDs exhibited a high photosensitivity(5 103) for 365 nm UV light with a fast recovery time(0.2 s) at a reverse bias voltage of 2 V. The light induced modulation of Schottky barrier and MNW–MNW junction barrier was employed to account for the results. It was also observed that the PD had a high on–off ratio of 800 without external bias. The photovoltaic effect was proposed to explain the self-powered phenomenon.
ISSN:1002-0071
DOI:10.1016/j.pnsc.2014.01.011