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    Deep Ultraviolet Copper(I) Thiocyanate (CuSCN) Photodetectors Based on Coplanar Nanogap Electrodes Fabricated via Adhesion Lithography

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    Name:
    Moon et al. ACS Appl. Mater. Interfaces 2017.pdf
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    1.152Mb
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    Description:
    Accepted Manuscript
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    Type
    Article
    Authors
    Wyatt-Moon, Gwenhivir
    Georgiadou, Dimitra G cc
    Semple, James
    Anthopoulos, Thomas D. cc
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2017-11-27
    Online Publication Date
    2017-11-27
    Print Publication Date
    2017-12-06
    Permanent link to this record
    http://hdl.handle.net/10754/626275
    
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    Abstract
    Adhesion lithography (a-Lith) is a versatile fabrication technique used to produce asymmetric coplanar electrodes separated by a <15 nm nanogap. Here, we use a-Lith to fabricate deep ultraviolet (DUV) photodetectors by combining coplanar asymmetric nanogap electrode architectures (Au/Al) with solution-processable wide-band-gap (3.5–3.9 eV) p-type semiconductor copper(I) thiocyanate (CuSCN). Because of the device’s unique architecture, the detectors exhibit high responsivity (≈79 A W–1) and photosensitivity (≈720) when illuminated with a DUV-range (λpeak = 280 nm) light-emitting diode at 220 μW cm–2. Interestingly, the photosensitivity of the photodetectors remains fairly high (≈7) even at illuminating intensities down to 0.2 μW cm–2. The scalability of the a-Lith process combined with the unique properties of CuSCN paves the way to new forms of inexpensive, yet high-performance, photodetectors that can be manufactured on arbitrary substrate materials including plastic.
    Citation
    Wyatt-Moon G, Georgiadou DG, Semple J, Anthopoulos TD (2017) Deep Ultraviolet Copper(I) Thiocyanate (CuSCN) Photodetectors Based on Coplanar Nanogap Electrodes Fabricated via Adhesion Lithography. ACS Applied Materials & Interfaces. Available: http://dx.doi.org/10.1021/acsami.7b12942.
    Sponsors
    G.W.M. and T.D.A. acknowledge the Engineering and Physical Sciences Research Council (EPSRC) grant no. EP/G037515/1. D.G.G. and T.D.A. acknowledge financial support from the European Union’s Horizon 2020 research and innovation programme (under the Marie Skłodowska-Curie grant agreement 706707).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.7b12942
    PubMed ID
    29172422
    Additional Links
    http://pubs.acs.org/doi/10.1021/acsami.7b12942
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.7b12942
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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