Vertical Heterostructure of SnS–MoS₂ Synthesized by Sulfur-Preloaded Chemical Vapor Deposition

Abstract

We synthesize a vertical heterostructure (HS) between tin sulfide (SnS) and molybdenum sulfide (MoS2) by chemical vapor deposition based on the preferential adsorption of sulfur on MoS2. Most of the SnS grains nucleate on MoS2 nanosheets, formatting partially stacked HS with large overlapping regions. Photoluminescence quenching of MoS2 is observed and illustrates effective charge separation in HS. The HS shows increased reverse saturable absorption relative to MoS2 and SnS. The preferential adsorption of sulfur powders on MoS2 and HS growth reported herein will provide a promising approach to the synthesis of other two-dimensional HS.

Recent Advances in 2D Metal Monochalcogenides

“…Nevertheless, to date there are limited studies on such interlayer optical and electronic responses. [254][255][256][257][258] Furthermore, the highly anisotropic electrical and optical properties in MMCs integrated with 0D (quantum dots) or 1D organic and/or inorganic and perovskite semiconductor materials could open up a new path for next-generation electronic applications. Overall, the very recent exciting achievements in the field of few-layer MMCs showed a great potential for their application in next-generation electronic, optoelectronic, and emerging nanophotonics, including valley electronics, solar cells, sensors, and nonlinear optical applications.…”

Controllable Epitaxial Growth of Large‐Area MoS2/WS2 Vertical Heterostructures by Confined‐Space Chemical Vapor Deposition

“…[4,8,10] Gong et al achieved direct growth of MoS 2 /WS 2 heterostructures on SiO 2 / Si substrate by CVD. [11] Several other TMDs vdWHs, such as MoS 2 /CdS, [12] WS 2 /NbSe 2 , [13] SnS/MoS 2 , [14] have been successfully synthesized by the CVD method. [15,16] The growth of vertical vdWHs is more difficult than that of bilayer TMDs.…”

Nanoengineering of Tin Monosulfide (SnS)‐Based Structures for Emerging Applications

“…It was manifested that this unique structure of 2D SnS NS/2D MoS 2 NS heterostructure could not only significantly promote effective charge separation and the photoluminescence quenching of MoS 2 , but also remarkably enhance optical nonlinearities compared with individual MoS 2 and SnS. [127]…”

“…Moreover, 2D SnS NSs or nanoflakes have also been introduced to fabricate SnS-based heterostructures in a loaded model for distinctly improved performances, such as 2D SnS NS/ carbonized bacterial cellulose (CBC) nanofiber heterostructures, [114] 2D SnS NS/C nanofiber composites, [28] 2D SnS NS/ 2D GeS NS heterostructures, [108] 2D SnS NS/2D MoS 2 NS heteostructures, [119,127] 2D SnS NS/1D aminated C heterostructures, [115] 2D SnS/1D hollow C microtube heterostructures, [111] 2D SnS NS/2D graphene heterostructures, [128] 2D SnS NS/1D CNT heterostructures, [112] etc. In 2021, Yuan et al [114] elaborately designed and rationally synthesized free-standing film consisting of 2D SnS NSs and CBC nanofibers by a hot bath reaction followed by carbonization at high temperature (600-800 C).…”

“…In addition, a vertical heterostructure composed of 2D SnS NS and 2D MoS 2 NS was designed and fabricated based on the preferential adsorption of S powder by the precursor, MoS 2 . [127] The schematic diagram of the fabrication procedure of 2D SnS NS/ 2D MoS 2 NS heterostructure is presented in Figure 8h. It has three steps: i) sulfurization of raw material MoO 3 was carried out to fabricate a MoS 2 monolayer on a SiO 2 /Si substrate [129,130] ; ii) the preferential adsorption of S on the MoS 2 monolayer; iii) S-preloaded MoS 2 was converted into the 2D SnS/2D MoS 2 vertical heterostructure after the flow of SnCl 4 vapor.…”