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

Nanomaterials

Peiguang Yan¹  Shuangchen Ruan¹  Huancheng Zhao¹  Wenfei Zhang¹  Ling Li¹  Xiangyang Li¹  Zhenhua Sun¹  Huawei Liang¹  Keyu Tao¹ 

[1] Shenzhen Key Laboratory of Laser Engineering, College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China;

关键词: SnSe₂ quantum dots;    graphene;    phototransistor;    UV-detector;   

DOI  :  10.3390/nano9091324

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown