期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 9, 期 2, 页码 -出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0tc04106h
关键词
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资金
- National Natural Science Foundation of China [61705136, 61827819]
- Natural Science Foundation of Guangdong Province for Distinguished Young Scholars [2018B030306038]
- Science and Technology Innovation Commission of Shenzhen [KQJSCX20180328095501798, JCYJ20180507182047316, JCYJ20190808144015264]
- Natural Science Foundation of SZU [860-000002110429, 860-000002110435]
- Science and Technology Development Fund, Macao SAR, China [132/2017/A3]
- NTUT-SZU Joint Research Program [2019007]
A unique and rapid solution method has been proposed for the synthesis of high-quality hexagonal Te nanosheets, which showed excellent optical absorption, good photoresponse, and stability as a photoanode material in a photoelectrochemical photodetector. Additionally, the Te nanosheets demonstrated excellent nonlinear absorption properties and successfully achieved mode-locking operation in a erbium-doped fiber ring laser.
Tellurene, as a typical non-layered two-dimensional (2D) material, has attracted a lot of attention due to its superior properties such as fast photoconductivity, high thermoelectricity, large piezoelectricity, and excellent nonlinear optical response. Here, a unique, simple, and rapid solution method for the synthesis of high-quality hexagonal Te nanosheets with large area has been proposed. In the presence of polyvinylpyrrolidone (PVP) as a surfactant, the raw material, i.e., tellurium sodium hydride (NaHTe) was rapidly oxidized by O-2 in ethanol solution to obtain the hexagonal Te nanosheets with a size of 5-11 mu m and a thickness of 50-170 nm. In addition, the experimental results demonstrated that the prepared hexagonal Te nanosheets possessed good optical absorption and exhibited good photoresponse and stability as a photoanode material in a photoelectrochemical (PEC)-type photodetector. Meanwhile, this material also showed excellent nonlinear absorption properties, and the erbium-doped fiber ring laser with the Te nanosheets as a saturated absorption material successfully achieved mode-locking operation at 1550 nm. This work provides new ideas for the preparation of hexagonal Te nanosheets and their applications in optoelectronics and ultrafast photonics.
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