期刊
MATERIALS RESEARCH EXPRESS
卷 5, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/aabddf
关键词
TMDs; in-plane heterostructure; WS2/WSe2/MoS2; straintronics
资金
- National Natural Science foundation of China [11374190, 21333006]
- Taishan Scholar Program of Shandong Province
- Young Scholars Program of Shandong University (YSPSDU)
In-plane heterostructure of two-dimensional (2D) transition metal dichalcogenides (TMDs) means the formation of one-dimensional (1D) interfaces, and promises exciting properties. The electronic properties of in-plane heterostructure of WS2/WSe2/MoS2 are studied by means of the first-principles calculations based on density functional theory (DFT). We find that the band gap can be continuously tuned by changing the length of the components of the in-plane heterostructure, which can be explained by confinement effects. Lattice mismatch induced strain play a crucial role in determining the electronic properties, such as direct-indirect band gap transition, band alignment and the band offset of band edge. Our results suggest that the rich and tunable electronic properties endow in-plane heterostructure of WS2/WSe2/MoS2 great potential in applications in such as light emitting and photovoltaics.
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