A metal-semiconductor-metal detector based on ZnO nanowires grown on a graphene layer
| Autor: | Zifeng Zhang, Jinxiang Zhong, Weiwei Cai, Zhengyun Wu, Fengyan Zhang, Qijin Cheng, Qiang Xu |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Graphene business.industry Mechanical Engineering Detector Zno nanowires Bioengineering Nanotechnology General Chemistry law.invention Metal Semiconductor Mechanics of Materials law visual_art visual_art.visual_art_medium General Materials Science Graphite Electrical and Electronic Engineering business Layer (electronics) |
| Zdroj: | Nanotechnology. 25(5) |
| ISSN: | 1361-6528 |
| Popis: | High quality ZnO nanowires (NWs) were grown on a graphene layer by a hydrothermal method. The ZnO NWs revealed higher uniform surface morphology and better structural properties than ZnO NWs grown on SiO2/Si substrate. A low dark current metal-semiconductor-metal photodetector based on ZnO NWs with Au Schottky contact has also been fabricated. The photodetector displays a low dark current of 1.53 nA at 1 V bias and a large UV-to-visible rejection ratio (up to four orders), which are significantly improved compared to conventional ZnO NW photodetectors. The improvement in UV detection performance is attributed to the existence of a surface plasmon at the interface of the ZnO and the graphene. |
| Databáze: | OpenAIRE |
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