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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
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Nanomaterials 2019, 9(9), 1324;
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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MDPI and ACS Style

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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