Abstract
Atomically thin, two-dimensional (2D) indium selenide (InSe) is a new graphene-like semiconducting material which has gained significant attention due to the large tunability in the bandgap (from 1.4 to 2.6 eV) and high carrier mobility. Constructing InSe-based van der Waals heterostructure (vdWH) is a potential way to achieve more desirable properties and further extend the application of InSe. Herein, we firstly demonstrate the electronic and optical properties of the InSe/CrS2 vdWH by using first-principles calculation. Our results suggest that this heterostructure has an intrinsic mixing band alignment with the bandgap of 1.20 eV, which shows a good light absorption in visible light region. Meanwhile, an intrinsic mixing band alignment can be transformed between type-I and type-II. Moreover, the bandgap values can be tuned by applying electric field. These results indicate that the flexible InSe/CrS2 vdWH can provide new ways to utilize 2D materials in future optoelectronic devices.
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This work was supported by the National Natural Science Foundation of China (11804393) and the Fundamental Research Funds for the Central Universities (18CX02043A).
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Guo, Y., Zhao, L. & Zheng, D. Theoretical investigation on the electronic structure of new InSe/CrS2 van der Waals heterostructure. Journal of Materials Research 37, 2157–2164 (2022). https://doi.org/10.1557/s43578-022-00548-8
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DOI: https://doi.org/10.1557/s43578-022-00548-8