Find in Library

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.