Journal
NANOMATERIALS
Volume 9, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/nano9091324
Keywords
SnSe2 quantum dots; graphene; phototransistor; UV-detector
Categories
Funding
- Science and Technology Projects of Shenzhen [JCYJ20180305125000525, JCYJ20170302151033006, JCYJ20160328144942069]
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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 x 10(6) mAW(-1), and the photoresponse time was similar to 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.
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