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    A highly sensitive, large area, and self-powered UV photodetector based on coalesced gallium nitride nanorods/graphene/silicon (111) heterostructure

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    AA_A highly sensitive.pdf
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    Type
    Article
    Authors
    Zulkifli, Nur 'Adnin Akmar
    Park, Kwangwook cc
    Min, Jung-Wook
    Ooi, Boon S. cc
    Zakaria, Rozalina cc
    Kim, Jongmin
    Tan, Chee Leong cc
    KAUST Department
    Photonics Laboratory
    Electrical Engineering Program
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Date
    2020-11-13
    Online Publication Date
    2020-11-13
    Print Publication Date
    2020-11-09
    Embargo End Date
    2021-11-13
    Submitted Date
    2020-06-12
    Permanent link to this record
    http://hdl.handle.net/10754/665951
    
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    Abstract
    In this paper, we demonstrate an ultraviolet photodetector (UV-PD) that uses coalesced gallium nitride (GaN) nanorods (NRs) on a graphene/Si (111) substrate grown by plasma-assisted molecular beam epitaxy. We report a highly sensitive, self-powered, and hybrid GaN NR/graphene/Si (111) PD with a relatively large 100 mm2 active area, a high responsivity of 17.4 A/W, a high specific detectivity of 1.23 1013 Jones, and fast response speeds of 13.2/13.7 ls (20 kHz) under a UV light of 355 nm at zero bias voltage. The results show that the thin graphene acts as a perfect interface for GaN NRs, encouraging growth with minimum defects on the Si substrate. Our results suggest that the GaN NR/graphene/Si (111) heterojunction has a range of interesting properties that make it well-suited for a variety of photodetection applications.
    Citation
    Zulkifli, N. ’Adnin A., Park, K., Min, J.-W., Ooi, B. S., Zakaria, R., Kim, J., & Tan, C. L. (2020). A highly sensitive, large area, and self-powered UV photodetector based on coalesced gallium nitride nanorods/graphene/silicon (111) heterostructure. Applied Physics Letters, 117(19), 191103. doi:10.1063/5.0018076
    Sponsors
    The authors extend special thanks to Dr. Mohammad Khaled Shakfa and Ram Chandra Subedi of the Photonics Laboratory, King Abdullah University of Science and Technology, Saudi Arabia, for their useful discussions and PL measurement. The authors declare that they have no competing financial interest. R. Zakaria and N. A. A. Zulkifli would like to acknowledge support from the University of Malaya (No. IIRG03–2019). K. Park would like to acknowledge support from the National Research Foundation of Korea (NRF) grant funded by the Korea Government (MSIT) (No. NRF2020R1F1A1070471).
    Publisher
    AIP Publishing
    Journal
    Applied Physics Letters
    DOI
    10.1063/5.0018076
    Additional Links
    http://aip.scitation.org/doi/10.1063/5.0018076
    ae974a485f413a2113503eed53cd6c53
    10.1063/5.0018076
    Scopus Count
    Collections
    Articles; Electrical and Computer Engineering Program; Photonics Laboratory; Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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