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  • Large-Scale Production of Bismuth Chalcogenide and Graphene Heterostructure and Its Application for Flexible Broadband Photodetector

    Author(s)
    Song, Jingchao
    Yuan, Jian
    Xia, Fang
    Liu, Jingying
    Zhang, Yupeng
    Zhong, Yu Lin
    Zheng, Jialu
    Liu, Yan
    Li, Shaojuan
    Zhao, Meng
    Tian, Zhiming
    Caruso, Rachel A
    Loh, Kian Ping
    Bao, Qiaoliang
    Griffith University Author(s)
    Zhong, Yulin
    Year published
    2016
    Metadata
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    Abstract
    Large‐scale production of 2D van der Waals heterostructures with precisely controlled chemical composition is the major challenge hindering their practical electric and optoelectronic applications. In this work, a solvothermal method is demonstrated to produce van der Waals heterostructures consisting of metal chalcogenides and graphene in a large scale. In situ powder X‐ray diffraction reveals that graphene plays an important role as atomic template to grow bismuth chalcogenide nanoplatelets with preferential stoichiometry of Bi2Se1.5Te1.5, which is naturally unstable. It is found that Bi2Se1.5Te1.5 has the minimum lattice ...
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    Large‐scale production of 2D van der Waals heterostructures with precisely controlled chemical composition is the major challenge hindering their practical electric and optoelectronic applications. In this work, a solvothermal method is demonstrated to produce van der Waals heterostructures consisting of metal chalcogenides and graphene in a large scale. In situ powder X‐ray diffraction reveals that graphene plays an important role as atomic template to grow bismuth chalcogenide nanoplatelets with preferential stoichiometry of Bi2Se1.5Te1.5, which is naturally unstable. It is found that Bi2Se1.5Te1.5 has the minimum lattice mismatch with graphene (<0.1%). The release of lattice mismatch strain between Bi2Se1.5Te1.5 and graphene sheet is evidenced by a new peak in the ultraviolet photoelectron spectroscopy. A macroscale free‐standing heterostructured thin film with excellent mechanical flexibility is fabricated by simply filtering the large‐scale solution processed heterostructure. The heterostructure film is used to fabricate a flexible photodetector, which shows a broadband photo response and excellent durability in a bending test. The heterostructure material and device demonstrated in this work may shed light to flexible optoelectronic devices and applications.
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    Journal Title
    Advanced Electronic Materials
    Volume
    2
    Issue
    5
    DOI
    https://doi.org/10.1002/aelm.201600077
    Subject
    Electrical engineering
    Materials engineering
    Functional materials
    Publication URI
    http://hdl.handle.net/10072/173787
    Collection
    • Journal articles

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