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    Monolayer MoSe 2 Grown by Chemical Vapor Deposition for Fast Photodetection

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    Monolayer MoSe2 Grown by Chemical Vapor deposition for Fast Photodetection.pdf
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    Description:
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    Type
    Article
    Authors
    Chang, Yung-Huang
    Zhang, Wenjing
    Zhu, Yihan
    Han, Yu cc
    Pu, Jiang
    Chang, Jan-Kai
    Hsu, Wei-Ting
    Huang, Jing-Kai
    Hsu, Chang-Lung
    Chiu, Ming-Hui cc
    Takenobu, Taishi
    Li, Henan
    Wu, Chih-I
    Chang, Wen-Hao cc
    Wee, Andrew Thye Shen
    Li, Lain-Jong cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Material Science and Engineering Program
    Nanostructured Functional Materials (NFM) laboratory
    Physical Science and Engineering (PSE) Division
    Date
    2014-08-07
    Online Publication Date
    2014-08-07
    Print Publication Date
    2014-08-26
    Permanent link to this record
    http://hdl.handle.net/10754/338571
    
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    Abstract
    Monolayer molybdenum disulfide (MoS2) has become a promising building block in optoelectronics for its high photosensitivity. However, sulfur vacancies and other defects significantly affect the electrical and optoelectronic properties of monolayer MoS2 devices. Here, highly crystalline molybdenum diselenide (MoSe2) monolayers have been successfully synthesized by the chemical vapor deposition (CVD) method. Low-temperature photoluminescence comparison for MoS2 and MoSe 2 monolayers reveals that the MoSe2 monolayer shows a much weaker bound exciton peak; hence, the phototransistor based on MoSe2 presents a much faster response time (<25 ms) than the corresponding 30 s for the CVD MoS2 monolayer at room temperature in ambient conditions. The images obtained from transmission electron microscopy indicate that the MoSe exhibits fewer defects than MoS2. This work provides the fundamental understanding for the differences in optoelectronic behaviors between MoSe2 and MoS2 and is useful for guiding future designs in 2D material-based optoelectronic devices. © 2014 American Chemical Society.
    Citation
    Monolayer MoSe 2 Grown by Chemical Vapor Deposition for Fast Photodetection 2014, 8 (8):8582 ACS Nano
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Nano
    DOI
    10.1021/nn503287m
    Additional Links
    http://pubs.acs.org/doi/abs/10.1021/nn503287m
    ae974a485f413a2113503eed53cd6c53
    10.1021/nn503287m
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program

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