A high performance surface acoustic wave visible light sensor using novel materials: Bi2S3 nanobelts

Li, Chong, Kan, Hao, Luo, Jingting, Fu, Chen, Zhou, Jian, Liu, Xueli, Wang, Wen, Wei, Qiuping and Fu, Richard (2020) A high performance surface acoustic wave visible light sensor using novel materials: Bi2S3 nanobelts. RSC Advances, 10 (15). pp. 8936-8940. ISSN 2046-2069

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Low dimensional Bi2S3 materials are excellent for use in photodetectors with excellent stability and fast response time. In this work, we developed a visible light sensor with good performance based on surface acoustic wave (SAW) devices using Bi2S3 nanobelts as the sensing materials. The SAW delay-line sensor was fabricated on ST-cut quartz with a designed wavelength of 15.8 microns using conventional photolithography techniques. The measured center frequency was 200.02 MHz. The Bi2S3 nanobelts prepared by a facile hydrothermal process were deposited onto SAW sensors by spin-coating. Under irradiation of 625 nm visible light with a power intensity of 170 μW cm−2, the sensor showed a fast and large response with a frequency upshift of 7 kHz within 1 s. The upshift of the frequency of the SAW device is mainly attributed to the mass loading effect caused by the desorption of oxygen from the Bi2S3 nanobelts under visible light radiation.

Item Type: Article
Additional Information: Funding information: The authors gratefully acknowledge the support of the National Key Research and Development Program of China (grant no. 2016YFB0402705), State Key Laboratory of Powder Metallurgy, Central South University, the China Postdoctoral Science Foundation (2019M653018). This work was also supported by National Natural Science Foundation of China (grant no. 11704261, 51605485, 11575118), Shenzhen Science & Technology Project (grant no. JCYJ20170817100658231, JCYJ20180507182439574, JCYJ20180305124317872). Funding supports from UK Engineering Physics and Science Research Council (EPSRC EP/P018998/1).try.
Subjects: F100 Chemistry
F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 03 Apr 2020 09:58
Last Modified: 15 May 2023 15:30
URI: https://nrl.northumbria.ac.uk/id/eprint/42669

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