期刊
RSC ADVANCES
卷 6, 期 14, 页码 11146-11150出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra23028d
关键词
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资金
- National Science Council
- National Nano Devices Laboratories, Tainan, Taiwan [103-2221-E-492-047-MY3]
In this study, a transparent ZnO nanowire (NW)-based device for ethanol gas sensing and ultraviolet (UV) detection was fabricated and deposited onto an indium tin oxide/crystalline silicon (c-Si) solar cell. For UV detection, the photocurrent increased rapidly with a time constant of about 137 s when UV excitation was applied. The photocurrent decreased from 3 x 10(-6) to 1.2 x 10(-7) A when the UV light was switched off. For ethanol gas sensing, UV light was used to increase the quantity of O-2 species. The ZnO sensor response increased from 8% to 21% when the ethanol gas concentration was increased from 50 to 150 ppm at 53 degrees C (heat generated by the c-Si solar cell). The sensor response approximately zero without solar illumination. The sensor had almost no effect on the transfer efficiency of the solar cell.
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