期刊
APPLIED PHYSICS LETTERS
卷 121, 期 11, 页码 -出版社
AIP Publishing
DOI: 10.1063/5.0102834
关键词
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资金
- National Natural Science Foundation of China [61804092, 51702097]
- Basic Research Project of Qinghai Province [2022-ZJ-762]
This work demonstrates a wire-shaped photoelectrochemical type ultraviolet photodetector based on a titanium dioxide nanotube array (TNAs) photoanode fabricated by electrochemical anodization. The detector exhibits high photocurrent density, high ON/OFF ratio, and fast response time, as well as visible-blind characteristics and excellent linear response under weak irradiation. These results are beneficial for the realization of omnidirectional and wearable optoelectronic devices.
The multifunctional and smart ultraviolet photodetectors are of great significance and necessity for applications in many fields, especially in health and environmental risk monitoring. Hence, a wire-shaped photoelectrochemical type ultraviolet photodetector based on photoanode of TiO2 nanotube arrays (TNAs) fabricated by electrochemical anodization is demonstrated in this work. The TNAs can provide direct pathways for carriers and large internal surface area. The assembled UV detector presented a high photocurrent density of 110 mu Acm(-2), a high ON/OFF ratio of 467, and a fast rise and decay response time of 13 and 19ms for the optimal thickness of the photoanode of TNAs. Moreover, the detectors also exhibited visible-blind characteristics and an excellent linear response even under weak irradiation (20-100 mu Wcm(-2)). The results are beneficial to realizing omnidirectional and wearable optoelectronic devices.
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