NDLI: ZnO nanoneedle/H2O solid-liquid heterojunction-based self-powered ultraviolet detector.

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ZnO nanoneedle/H2O solid-liquid heterojunction-based self-powered ultraviolet detector.

Content Provider	Europe PMC
Author	Li, Qinghao Wei, Lin Xie, Yanru Zhang, Kai Liu, Lei Zhu, Dapeng Jiao, Jun Chen, Yanxue Yan, Shishen Liu, Guolei Mei, Liangmo
Copyright Year	2013
Abstract	ZnO nanoneedle arrays were grown vertically on a fluorine-doped tin oxide-coated glass by hydrothermal method at a relatively low temperature. A self-powered photoelectrochemical cell-type UV detector was fabricated using the ZnO nanoneedles as the active photoanode and H2O as the electrolyte. This solid-liquid heterojunction offers an enlarged ZnO/water contact area and a direct pathway for electron transport simultaneously. By connecting this UV photodetector to an ammeter, the intensity of UV light can be quantified using the output short-circuit photocurrent without a power source. High photosensitivity, excellent spectral selectivity, and fast photoresponse at zero bias are observed in this UV detector. The self-powered behavior can be well explained by the formation of a space charge layer near the interface of the solid-liquid heterojunction, which results in a built-in potential and makes the solid-liquid heterojunction work in photovoltaic mode.
ISSN	19317573
Journal	Nanoscale Research Letters
Volume Number	8
PubMed Central reference number	PMC3852892
Issue Number	1
PubMed reference number	24103153
e-ISSN	1556276X
DOI	10.1186/1556-276x-8-415
Language	English
Publisher	Springer
Publisher Date	2013-10-08
Access Restriction	Open
Rights License	This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Copyright © 2013 Li et al.; licensee Springer.
Subject Keyword	ZnO nanoneedle arrays Hydrothermal method Ultraviolet photodetector Solid-liquid heterojunction
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Condensed Matter Physics Materials Science

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