Two-dimensional WS/MoS heterostructures: properties and applications.

The successful fabrication of WS/MoS heterostructures provides more possibilities for optoelectronic and thermoelectric applications than graphene because of their direct bandgap characteristics; therefore, scientific investigations on WS/MoS heterostructures are more significant and thriving. In this paper, we review the latest research progress in WS/MoS heterostructures, and look forward to their properties and applications. Firstly, we analyze the crystal structure and electronic structure of WS, MoS, and their heterostructures. Secondly, we comprehensively present the widely used methods for preparing heterostructures. Finally, based on the unique physical characteristics of WS/MoS heterostructures, we focus on their properties and applications in mechanics, electronics, optoelectronics, and thermoelectronics.