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    CVD-grown monolayered MoS2 as an effective photosensor operating at low-voltage

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    Author
    Perea-López, Néstor; Lin, Zhong; Pradhan, Nihar R.; Iñiguez-Rábago, Agustín; Elías, Ana Laura; More... McCreary, Amber; Lou, Jun; Ajayan, Pulickel M.; Terrones, Humberto; Balicas, Luis; Terrones, Mauricio Less...
    Date
    2014
    Abstract
    We report the fabrication of a photosensor based on as-grown single crystal monolayers of MoS2synthesized by chemical vapor deposition (CVD). The measurements were performed using Au/Ti leads in a two terminal configuration on CVD-grown MoS2 on a SiO2/Si substrate. The device was operated in air at room temperature at low bias voltages ranging from −2 V to 2 V and its sensing capabilities were tested for two different excitation wavelengths (514.5 nm and 488 nm). The responsivity reached 1.1 mA W−1 when excited with a 514.5 nm laser at a bias of 1.5 V. This responsivity is one order of magnitude larger than that reported from photo devices fabricated using CVD-grown multilayered WS2. A rectifying-effect was observed for the optically excited current, which was four times larger in the direct polarization bias when compared to the reverse bias photocurrent. Such rectifying behavior can be attributed to the asymmetric electrode placement on the triangular MoS2 monocrystal. It is envisioned that these components could eventually be used as efficient and low cost photosensors based on CVD-grown transition metal dichalcogenide monolayers.
    Citation
    Perea-López, Néstor, Lin, Zhong, Pradhan, Nihar R., et al.. "CVD-grown monolayered MoS2 as an effective photosensor operating at low-voltage." 2D Materials, 1, (2014) IOP Publishing: 011004. http://dx.doi.org/10.1088/2053-1583/1/1/011004.
    Published Version
    http://dx.doi.org/10.1088/2053-1583/1/1/011004
    Type
    Journal article
    Publisher
    IOP Publishing
    Citable link to this page
    https://hdl.handle.net/1911/88301
    Rights
    Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
    Link to License
    http://creativecommons.org/licenses/by/3.0/
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    • Faculty Publications [4988]
    • Materials Science and NanoEngineering Publications [352]

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    Home | FAQ | Contact Us | Privacy Notice | Accessibility Statement
    Managed by the Digital Scholarship Services at Fondren Library, Rice University
    Physical Address: 6100 Main Street, Houston, Texas 77005
    Mailing Address: MS-44, P.O.BOX 1892, Houston, Texas 77251-1892
    Site Map