Vertical\nHeterostructure of SnS–MoS₂ Synthesized by Sulfur-Preloaded\nChemical Vapor Deposition

Abstract

We\nsynthesize a vertical heterostructure (HS) between tin sulfide (SnS)\nand molybdenum sulfide (MoS₂) by chemical vapor deposition\nbased on the preferential adsorption of sulfur on MoS₂.\nMost of the SnS grains nucleate on MoS₂ nanosheets, formatting\npartially stacked HS with large overlapping regions. Photoluminescence\nquenching of MoS₂ is observed and illustrates effective\ncharge separation in HS. The HS shows increased reverse saturable\nabsorption relative to MoS₂ and SnS. The preferential adsorption\nof sulfur powders on MoS₂ and HS growth reported herein\nwill provide a promising approach to the synthesis of other two-dimensional\nHS.