Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 10, Issue 15, Pages 13002-13010Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b01038
Keywords
SnS2; graphene; photodetectors; transistors; vertical-layered heterostructures; 2D; TMDs; Schottky barrier height
Funding
- Royal Society
- European Research Council (CoG grant) [725258]
- Taiwan Government Scholarship to Study Abroad
- EPSRC [EP/J018694/1, EP/M015173/1] Funding Source: UKRI
- European Research Council (ERC) [725258] Funding Source: European Research Council (ERC)
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Tin disulfide crystals with layered two-dimensional (2D) sheets are grown by chemical vapor deposition using a novel precursor approach and integrated into all 2D transistors with graphene (Gr) electrodes. The Gr:SnS2:Gr transistors exhibit excellent photodetector response with high detectivity and photoresponsivity. We show that the response of the all 2D photodetectors depends upon charge trapping at the interface and the Schottky barrier modulation. The thickness-dependent SnS2 measurements in devices reveal a transition from the interface dominated response for thin crystals to bulklike response for the thicker SnS2 crystals, showing the sensitivity of devices fabricated using layered materials on the number of layers. These results show that SnS2 has photosensing performance when combined with Gr electrodes that is comparable to other 2D transition metal dichalcogenides of MoS2 and WS2.
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