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Open AccessArticle

SnSe2 Quantum Dots: Facile Fabrication and Application in Highly Responsive UV-Detectors

Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
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Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2019, 9(9), 1324; https://doi.org/10.3390/nano9091324
Received: 19 August 2019 / Revised: 6 September 2019 / Accepted: 10 September 2019 / Published: 15 September 2019
Synthesizing quantum dots (QDs) using simple methods and utilizing them in optoelectronic devices are active areas of research. In this paper, we fabricated SnSe2 QDs via sonication and a laser ablation process. Deionized water was used as a solvent, and there were no organic chemicals introduced in the process. It was a facile and environmentally-friendly method. We demonstrated an ultraviolet (UV)-detector based on monolayer graphene and SnSe2 QDs. The photoresponsivity of the detector was up to 7.5 × 106 mAW−1, and the photoresponse time was ~0.31 s. The n–n heterostructures between monolayer graphene and SnSe2 QDs improved the light absorption and the transportation of photocarriers, which could greatly increase the photoresponsivity of the device. View Full-Text
Keywords: SnSe2 quantum dots; graphene; phototransistor; UV-detector SnSe2 quantum dots; graphene; phototransistor; UV-detector
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Li, X.; Li, L.; Zhao, H.; Ruan, S.; Zhang, W.; Yan, P.; Sun, Z.; Liang, H.; Tao, K. SnSe2 Quantum Dots: Facile Fabrication and Application in Highly Responsive UV-Detectors. Nanomaterials 2019, 9, 1324.

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