Interlayer interactions in transition metal dichalcogenides heterostructures

The successful preparation of heterostructures provides more possibilities for the application of mechanics, optoelectronics, and thermoelectronics. Controlling the interlayer interaction of heterostructures can further optimize their performance, hence, it is very important to investigate the interlayer interaction property of heterostructures. Firstly, the crystal structure, energy band structure, exciton behavior, and lattice vibrational of transition metal dichalcogenides (TMDs) are reviewed in this paper. Secondly, the types and interactions of heterostructures are analyzed, such as charge transfer, energy transfer, interlayer exciton, etc. Finally, the factors affecting the interlayer interaction are introduced, which promote the development and application of new devices based on two-dimensional heterostructures in the future.