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    Ultrafast charge transfer in a type-II MoS2-ReSe2 van der Waals heterostructure

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    Zhang_2019.pdf (2.542Mb)
    Issue Date
    2019-06-24
    Author
    Zhang, Lu
    He, Dawei
    He, Jiaqi
    Fu, Yang
    Bian, Ang
    Han, Xiuxiu
    Liu, Shuangyan
    Wang, Yongsheng
    Zhao, Hui
    Publisher
    Optical Society of America
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Rights
    © 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement.
    Metadata
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    Abstract
    We fabricated a van der Waals heterostructure by stacking together monolayers of MoS2 and ReSe2. Transient absorption measurements were performed to study the dynamics of charge transfer, indirect exciton formation, and indirect exciton recombination. The results show that the heterostructure form a type-II band alignment with the conduction band minimum and valance band maximum located in the MoS2 and ReSe2 layers, respectively. By using different pump-probe configurations, we found that electrons could efficiently transfer from ReSe2 to MoS2 and holes along the opposite direction. Once transferred, the electrons and holes form spatially indirect excitons, which have longer recombination lifetimes than excitons in individual monolayers. These results provide useful information for developing van der Waals heterostructure involving ReSe2 for novel electronic and optoelectronic applications.
    URI
    http://hdl.handle.net/1808/31214
    DOI
    https://doi.org/10.1364/OE.27.017851
    Collections
    • Physics & Astronomy Scholarly Works [1713]
    Citation
    Lu Zhang, Dawei He, Jiaqi He, Yang Fu, Ang Bian, Xiuxiu Han, Shuangyan Liu, Yongsheng Wang, and Hui Zhao, "Ultrafast charge transfer in a type-II MoS2-ReSe2 van der Waals heterostructure," Opt. Express 27, 17851-17858 (2019)

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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