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  • Electrochemically Exfoliated Platinum Dichalcogenide Atomic Layers for High-Performance Air-Stable Infrared Photodetectors

    Author(s)
    Ma, Yaping
    Shao, Xiji
    Li, Jing
    Dong, Bowei
    Hu, Zhenliang
    Zhou, Qiulan
    Xu, Haomin
    Zhao, Xiaoxu
    Fang, Hanyan
    Li, Xinzhe
    Li, Zejun
    Wu, Jing
    Zhao, Meng
    Zhong, Yu Lin
    et al.
    Griffith University Author(s)
    Zhong, Yulin
    Year published
    2021
    Metadata
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    Abstract
    Platinum dichalcogenide (PtX2), an emergent group-10 transition metal dichalcogenide (TMD) has shown great potential in infrared photonic and optoelectronic applications due to its layer-dependent electronic structure with potentially suitable bandgap. However, a scalable synthesis of PtSe2 and PtTe2 atomic layers with controlled thickness still represents a major challenge in this field because of the strong interlayer interactions. Herein, we develop a facile cathodic exfoliation approach for the synthesis of solution-processable high-quality PtSe2 and PtTe2 atomic layers for high-performance infrared (IR) photodetection. ...
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    Platinum dichalcogenide (PtX2), an emergent group-10 transition metal dichalcogenide (TMD) has shown great potential in infrared photonic and optoelectronic applications due to its layer-dependent electronic structure with potentially suitable bandgap. However, a scalable synthesis of PtSe2 and PtTe2 atomic layers with controlled thickness still represents a major challenge in this field because of the strong interlayer interactions. Herein, we develop a facile cathodic exfoliation approach for the synthesis of solution-processable high-quality PtSe2 and PtTe2 atomic layers for high-performance infrared (IR) photodetection. As-exfoliated PtSe2 and PtTe2 bilayer exhibit an excellent photoresponsivity of 72 and 1620 mA W-1 at zero gate voltage under a 1540 nm laser illumination, respectively, approximately several orders of magnitude higher than that of the majority of IR photodetectors based on graphene, TMDs, and black phosphorus. In addition, our PtSe2 and PtTe2 bilayer device also shows a decent specific detectivity of beyond 109 Jones with remarkable air-stability (>several months), outperforming the mechanically exfoliated counterparts under the laser illumination with a similar wavelength. Moreover, a high yield of PtSe2 and PtTe2 atomic layers dispersed in solution also allows for a facile fabrication of air-stable wafer-scale IR photodetector. This work demonstrates a new route for the synthesis of solution-processable layered materials with the narrow bandgap for the infrared optoelectronic applications.
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    Journal Title
    ACS Appl Mater Interfaces
    DOI
    https://doi.org/10.1021/acsami.0c20535
    Note
    This publication has been entered as an advanced online version in Griffith Research Online.
    Subject
    Chemical Sciences
    Engineering
    IR photodetectors
    air-stable
    bilayer PtSe2
    bilayer PtTe2
    electrochemical exfoliation
    Publication URI
    http://hdl.handle.net/10072/402157
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