http://scholars.ntou.edu.tw/handle/123456789/23079
Title: | Photoconductive enhancement of Au nanoparticles-decorated single ZnO nanowire photodetector through formation of local schottky junction | Authors: | Ming-Wei Chen Cheng-Ying Chen Hau He |
Keywords: | Photoconductivity;Gold;Zinc oxide;Photodetectors;Photonics;Space charge;Helium;Nanoparticles;Electron traps;Schottky barriers | Issue Date: | Jan-2010 | Publisher: | IEEE | Start page/Pages: | 1181-1182 | Source: | 2010 3rd International Nanoelectronics Conference (INEC) | Conference: | Nanoelectronics Conference (INEC), 2010 3rd International | Abstract: | A single ZnO nanowire (NW) photodetector was fabricated and measured under different excitation intensities. The photoconductive internal gain was decreased as the excitation intensity was increased, indicating the hole-trapping photoconduction mechanism of ZnO NWs. As Au nanoparticles are decorated at the surface of a ZnO NW, the local space charge region is formed due to the existence of Schottky junction. This enhancement of the surface electric field results in more pronounced electron-hole separation effect, which then prolongs the lifetime of photogenerated electron and consequently increases the photocurrent. This study provides an easy way to enhance the sensitivity of photodetectors. |
Description: | 03-08 January 2010 Hong Kong |
URI: | http://scholars.ntou.edu.tw/handle/123456789/23079 | DOI: | 10.1109/INEC.2010.5424964 |
Appears in Collections: | 光電與材料科技學系 |
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