Structural, electronic and optical properties of graphene/C2P4 van der Waals heterostructures with direct bandgap and high absorption coefficient
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Published:2023-03-20
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Volume:
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ISSN:0217-9792
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Container-title:International Journal of Modern Physics B
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language:en
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Short-container-title:Int. J. Mod. Phys. B
Author:
Cheng Xiaoli1,
Fu Xi12,
Li Xiaowu2,
Liao Wenhu1,
Guo Jiyuan3,
Li Liming2
Affiliation:
1. Department of Physics Jishou University, Jishou 416000, P. R. China
2. College of Science, Hunan University of Science and Engineering, Yongzhou 425199, P. R. China
3. School of Science, Jiangsu University of Science and Technology, Zhenjiang 212003, P. R. China
Abstract
In this paper, we formed two graphene/C2P4 van der Waals (vdW) heterostructures (HSs) by stacking the graphene and the C2P4 monolayer which have been predicted by us. First, we investigated the stability of C2P4 monolayer, and calculated the binding energies and flat average differential charge density of two vdW-HSs. Second, we found that two graphene/C2P4 vdW-HSs are all direct semiconductors with bandgap as 0.051/0.064[Formula: see text]eV and 0.536/0.697[Formula: see text]eV under GGA-PBE/HSE06 functional, respectively, which provides a way to unfold the zero bandgap of graphene or let an indirect monolayer to be a relevant direct semiconductor. Additionally, two graphene/C2P4 vdW-HSs possess high absorption coefficients (16%[Formula: see text]18%) for the visible light and higher absorption coefficients (22%) for the near ultraviolet light, respectively. These admirable properties make two vdW-HSs as novel and potential two-dimensional materials applied on optoelectronic, electronic and photovoltaics devices.
Funder
National Natural Science Foundation of China
Hunan Natural Science Foundation of China
Research and Innovation Fund for postgraduates in Hunan Province of China
Publisher
World Scientific Pub Co Pte Ltd
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics