Electronic structures and enhanced optical properties of blue phosphorene/transition metal dichalcogenides van der Waals heterostructures

As a fast emerging topic, van der Waals (vdW) heterostructures have been proposed to modify two-dimensional layered materials with desired properties, thus greatly extending the applications of these materials. In this work, the stacking characteristics, electronic structures, band edge alignments,...

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Bibliographic Details
Published in:Scientific reports 2016-08, Vol.6 (1), p.31994-31994, Article 31994
Main Authors: Peng, Qiong, Wang, Zhenyu, Sa, Baisheng, Wu, Bo, Sun, Zhimei
Format: Article
Language:English
Subjects:
639/301/1034/1038
639/301/299/946
Conduction
Electrons
Energy conversion
Humanities and Social Sciences
Irradiation
multidisciplinary
Optical properties
Photovoltaic cells
Radiation
Science
Solar cells
Thin films
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Summary:As a fast emerging topic, van der Waals (vdW) heterostructures have been proposed to modify two-dimensional layered materials with desired properties, thus greatly extending the applications of these materials. In this work, the stacking characteristics, electronic structures, band edge alignments, charge density distributions and optical properties of blue phosphorene/transition metal dichalcogenides (BlueP/TMDs) vdW heterostructures were systematically studied based on vdW corrected density functional theory. Interestingly, the valence band maximum and conduction band minimum are located in different parts of BlueP/MoSe 2 , BlueP/WS 2 and BlueP/WSe 2 heterostructures. The MoSe 2 , WS 2 or WSe 2 layer can be used as the electron donor and the BlueP layer can be used as the electron acceptor. We further found that the optical properties under visible-light irradiation of BlueP/TMDs vdW heterostructures are significantly improved. In particular, the predicted upper limit energy conversion efficiencies of BlueP/MoS 2 and BlueP/MoSe 2 heterostructures reach as large as 1.16% and 0.98%, respectively, suggesting their potential applications in efficient thin-film solar cells and optoelectronic devices.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep31994