Realization of a high-Responsivity ultraviolet sensor base on ZnO nanowires modified by Au nanoparticles
| Autor: | Zewen Liu, Zhengqi Bai |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Photocurrent
Materials science business.industry Schottky barrier Nanowire Photodetector 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology medicine.disease_cause 01 natural sciences 0104 chemical sciences Responsivity Semiconductor medicine Optoelectronics 0210 nano-technology business Ultraviolet Dark current |
| Zdroj: | 2017 IEEE SENSORS. |
| DOI: | 10.1109/icsens.2017.8234120 |
| Popis: | In this paper, an ultraviolet photodetector based on ZnO nanowires modified by Au nanoparticles. Due to the high specific surface area of the nanowires and the nano-plasmonic enhancement induced by the adsorbed Au nanoparticles, the measurements reveal a higher photocurrent compared with pure ZnO photodetectors. The dark current was reduced cause of the Schottky junction between metal and semiconductor. By calculation, the maximum responsivity in ultraviolet band of obtained device is up to 9.4A/W at operating bias. Another role of Au NPs adsorbed on the surface of NWs is the scattering effect, which may contribute to more photo absorption. The results indicated that nano-plasmonic enhancement effect could be efficient for UV region and the demonstration of the as-fabricated device provides a feasible and cost-effective method to potential application for UV optoelectronic device. |
| Databáze: | OpenAIRE |
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