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Transport and Photoelectric Properties of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures
[Image: see text] The transport and photoelectric properties of four two-dimensional (2D) silicene/MX(2) (M = Mo, W; X = S, Se) heterostructures have been investigated by employing density functional theory, nonequilibrium Green’s function, and Keldysh nonequilibrium Green’s function methods. The st...
Autores principales: | , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644475/ https://www.ncbi.nlm.nih.gov/pubmed/31458043 http://dx.doi.org/10.1021/acsomega.8b01282 |
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author | Wang, Yuxiu qi, Rui Jiang, Yingjie Sun, Cuicui Zhang, Guiling Hu, Yangyang Yang, Zhao-Di Li, Weiqi |
author_facet | Wang, Yuxiu qi, Rui Jiang, Yingjie Sun, Cuicui Zhang, Guiling Hu, Yangyang Yang, Zhao-Di Li, Weiqi |
author_sort | Wang, Yuxiu |
collection | PubMed |
description | [Image: see text] The transport and photoelectric properties of four two-dimensional (2D) silicene/MX(2) (M = Mo, W; X = S, Se) heterostructures have been investigated by employing density functional theory, nonequilibrium Green’s function, and Keldysh nonequilibrium Green’s function methods. The stabilities of silicene (SiE) are obviously improved after being placed on the MX(2) (M = Mo, W; X = S, Se) substrates. In particular, the conductivities of SiE/MX(2) are enhanced compared with free-standing SiE and MX(2). Moreover, the conductivities are increased with the group number of X, i.e., in the order of SiE < SiE/MS(2) < SiE/MSe(2). An evident current oscillation phenomenon is observed in the SiE/WX(2) heterostructures. When a linear light illumination is applied, SiE/MSe(2) shows a stronger photoresponse than SiE/MS(2). The maximum photoresponse with a value of 9.0a(0)(2)/photon was obtained for SiE/WSe(2). More importantly, SiE/MS(2) (M = Mo, W) heterostructures are good candidates for application in designing solar cells owing to the well spatial separation of the charge carriers. This work provides some clues for further exploring 2D SiE/MX(2) heterostructures involving tailored photoelectric properties. |
format | Online Article Text |
id | pubmed-6644475 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66444752019-08-27 Transport and Photoelectric Properties of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures Wang, Yuxiu qi, Rui Jiang, Yingjie Sun, Cuicui Zhang, Guiling Hu, Yangyang Yang, Zhao-Di Li, Weiqi ACS Omega [Image: see text] The transport and photoelectric properties of four two-dimensional (2D) silicene/MX(2) (M = Mo, W; X = S, Se) heterostructures have been investigated by employing density functional theory, nonequilibrium Green’s function, and Keldysh nonequilibrium Green’s function methods. The stabilities of silicene (SiE) are obviously improved after being placed on the MX(2) (M = Mo, W; X = S, Se) substrates. In particular, the conductivities of SiE/MX(2) are enhanced compared with free-standing SiE and MX(2). Moreover, the conductivities are increased with the group number of X, i.e., in the order of SiE < SiE/MS(2) < SiE/MSe(2). An evident current oscillation phenomenon is observed in the SiE/WX(2) heterostructures. When a linear light illumination is applied, SiE/MSe(2) shows a stronger photoresponse than SiE/MS(2). The maximum photoresponse with a value of 9.0a(0)(2)/photon was obtained for SiE/WSe(2). More importantly, SiE/MS(2) (M = Mo, W) heterostructures are good candidates for application in designing solar cells owing to the well spatial separation of the charge carriers. This work provides some clues for further exploring 2D SiE/MX(2) heterostructures involving tailored photoelectric properties. American Chemical Society 2018-10-16 /pmc/articles/PMC6644475/ /pubmed/31458043 http://dx.doi.org/10.1021/acsomega.8b01282 Text en Copyright © 2018 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes. |
spellingShingle | Wang, Yuxiu qi, Rui Jiang, Yingjie Sun, Cuicui Zhang, Guiling Hu, Yangyang Yang, Zhao-Di Li, Weiqi Transport and Photoelectric Properties of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures |
title | Transport and Photoelectric Properties
of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures |
title_full | Transport and Photoelectric Properties
of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures |
title_fullStr | Transport and Photoelectric Properties
of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures |
title_full_unstemmed | Transport and Photoelectric Properties
of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures |
title_short | Transport and Photoelectric Properties
of 2D Silicene/MX(2) (M = Mo, W; X = S, Se) Heterostructures |
title_sort | transport and photoelectric properties
of 2d silicene/mx(2) (m = mo, w; x = s, se) heterostructures |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6644475/ https://www.ncbi.nlm.nih.gov/pubmed/31458043 http://dx.doi.org/10.1021/acsomega.8b01282 |
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