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    High-Performance Monolayer MoS2 Films at the Wafer Scale by Two-Step Growth

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    Type
    Article
    Authors
    Xu, Xiangming cc
    Das, Gobind cc
    He, Xin cc
    Hedhili, Mohamed N. cc
    Di Fabrizio, Enzo M. cc
    Zhang, Xixiang cc
    Alshareef, Husam N. cc
    KAUST Department
    Functional Nanomaterials and Devices Research Group
    Material Science and Engineering Program
    Physical Characterization
    Physical Science and Engineering (PSE) Division
    Surface Science
    KAUST Grant Number
    CRF-2015-2634-CRG4||CRF-2016-2996-CRG5
    Date
    2019-05-16
    Embargo End Date
    2020-05-16
    Permanent link to this record
    http://hdl.handle.net/10754/656018
    
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    Abstract
    To realize multifunctional devices at the wafer scale, the growth process of monolayer (ML) 2D semiconductors must meet two key requirements: 1) growth of continuous and homogeneous ML film at the wafer scale and 2) controllable tuning of the properties of the ML film. However, there is still no growth method available that fulfills both of these criteria. Here, the first report is presented on the preparation of continuous and uniform ML MoS2 films through a two-step process at the wafer scale. Unlike in previous ML MoS2 film growth processes, the ML MoS2 film can be uniformly modulated across the wafer in terms of material structure and composition, exciton state, and electronic transport performance. A significant result is that the high-quality wafer-scale ML MoS2 films realize superior electronic performance compared to reported two-step-grown films, and it even matches or exceeds reported ML MoS2 films prepared by other processes. The transistor performance of the optimized ML film achieves a field effect mobility of 10 to 30 cm2 V−1 s−1, an on/off current ratio of about 107, and hysteresis as low as 0.4 V.
    Citation
    Xu, X., Das, G., He, X., Hedhili, M. N., Fabrizio, E. D., Zhang, X., & Alshareef, H. N. (2019). High-Performance Monolayer MoS 2 Films at the Wafer Scale by Two-Step Growth. Advanced Functional Materials, 29(32), 1901070. doi:10.1002/adfm.201901070
    Sponsors
    Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST). The authors thank the Advanced Nanofabrication, Imaging and Characterization Laboratory at KAUST for their excellent support. The authors also thank Dr. Mrinal K. Hota, Jehad K. El-Demellaw, Hyunho Kim, and Zhixiong Liu for useful discussions. Dr. Xin He and Prof. Xixiang Zhang acknowledge the financial support of KAUST under Grants Nos. CRF-2015-2634-CRG4 and CRF-2016-2996-CRG5.
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.201901070
    10.1002/adfm.201970224
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.201901070
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.201901070
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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