Journal
APPLIED SURFACE SCIENCE
Volume 605, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2022.154812
Keywords
Tungsten disulfide; Hexagonal boron nitride; Salt -promoted growth; Chemical vapor deposition; Optical and electronic properties
Categories
Funding
- National Natural Science Foundation of China [51702195, 61804117]
- Natural Science Basic Research Program of Shaanxi [2022JM-364]
- Young Talent Fund of Associa- tion for Science and Technology in Shaanxi [20220451]
- Xi?an Key Laboratory of Green Manufacture of Ceramiac Materials Foundation [2019220214SYS017CG039]
Ask authors/readers for more resources
This study successfully constructs monolayer tungsten disulfide on hexagonal boron nitride using chemical vapor deposition, and demonstrates improved optical and electrical properties compared to those on silicon substrates. Additionally, the study highlights the important role of salt in building the heterobilayer structure.
Monolayer tungsten disulfide (WS2), an emerging two-dimensional (2D) direct-bandgap semiconductor, provides new prospects for next-generation electronic, optoelectronic and valleytronic devices. However, the physical properties of 2D WS2, are seriously perturbed by various extrinsic disorders to a large extent. Despite encap-sulating exfoliated WS2 with hexagonal boron nitride (h-BN) flakes can effectively screen the surrounding dis-orders, its scalability is not applicable to large-area electronics. In this work, the construction of monolayer WS2 on h-BN is achieved with an all chemical vapor deposition (CVD) approach by using alkali metal salt to promote the growth of WS2. Detailed characterizations indicate that WS2 deposited on h-BN exhibits improved optical and electrical properties, as compared to those on SiO2/Si substrates. Furthermore, the influence of depositing WS2 on h-BN and salt-promoted growth behavior of WS2 is systematically investigated, highlighting the important role of salt in constructing the heterobilayers. This work paves a practical way for synthesis of 2D materials on h-BN to further probe their intrinsic properties and enable a plethora of potential applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available