標題: Core-Shell Ni-NiO Nano Arrays for UV Photodetection without an External Bias
作者: Liu, Chien-Min
Chen, Chih
Tseng, Yuan-Chieh
材料科學與工程學系
Department of Materials Science and Engineering
公開日期: 2012
摘要: This work demonstrates a simple method for fabricating a nano-structured device that performs notable photodetecting capabilities. With a template of anodic aluminum oxide, highly ordered Ni-NiO nano core-shell arrays were fabricated by annealing the electroless-deposited Ni arrays at 300 degrees C for 30 minutes. High-resolution transmission electron microscopy (HRTEM) demonstrated that a NiO layer with a thickness of similar to 5 nm was developed on the surface of the Ni arrays. The effects of annealing time and temperature on NiO were probed by HRTEM. Results show that temperature has a greater effect on the development of NiO. The Ni/NiO interface forms naturally a Schottky nanojunction, which covers most of the array surface when patterned with an indium-tin oxide (ITO) electrode. The ITO/Ni-NiO/Si device was found to yield photocurrent when exposed to ultraviolet (UV) light without an external voltage bias. The device takes great advantage of the large junction area and one-dimensional configuration of the core-shell array, displaying rapid photoresponse to UV light and subsequent steady photocurrent. These features make the proposed device a viable alternative to the UV photodetector. (C) 2012 The Electrochemical Society. [DOI: 10.1149/2.067204jes] All rights reserved.
URI: http://hdl.handle.net/11536/15707
http://dx.doi.org/10.1149/2.067204jes
ISSN: 0013-4651
DOI: 10.1149/2.067204jes
期刊: JOURNAL OF THE ELECTROCHEMICAL SOCIETY
Volume: 159
Issue: 4
起始頁: K78
結束頁: K82
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