Abstract
InSe-based van der Walls heterostructures (vdWHs) have attracted research interests recently because of their particular properties. In this work, the electronic structure and the optical properties of Mn-doped InSe/WSe2 vdWHs are investigated by using first-principles calculations. Mn doping in InSe/WSe2 vdWHs induces an increase in the system’s band gap. The optical properties of the vdWHs are also studied, and the absorption intensity of Mn-doped InSe/WSe2 is found to be enhanced in the near-infrared and ultraviolet regions. In addition, built-in electric fields are generated in InSe/WSe2 and Mn-doped InSe/WSe2, which can inhibit recombination of photogenerated electron-hole pairs. This work predicates the feasibility of enhancing the optical properties in InSe/WSe2 vdWHs by introducing dopants, which extends the applications of InSe materials in the field of optoelectronics.
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Acknowledgments
The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 11674197 and 11974215) and the Natural Science Foundation of Shandong Province (Grant No. ZR2018MA042). We are also grateful for the support from the Taishan Scholar Project of Shandong Province.
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Liang, R., Zhao, X., Hu, G. et al. Electronic Structure and Optical Properties of a Mn-Doped InSe/WSe2 van der Walls Heterostructure: First Principles Calculations. J. Korean Phys. Soc. 77, 587–591 (2020). https://doi.org/10.3938/jkps.77.587
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DOI: https://doi.org/10.3938/jkps.77.587