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    Near-IR Absorbing Molecular Semiconductors Incorporating Cyanated Benzothiadiazole Acceptors for High-Performance Semitransparent n-Type Organic Field-Effect Transistors

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    Main Text_NIR_SC_for_Transparent_TFT_final .pdf
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    2.739Mb
    Format:
    PDF
    Description:
    Accepted Manuscript
    Embargo End Date:
    2022-12-17
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    Type
    Article
    Authors
    Kafourou, Panagiota
    Nugraha, Mohamad Insan cc
    Nikitaras, Aggelos
    Tan, Luxi cc
    Firdaus, Yuliar cc
    Aniés, Filip cc
    Eisner, Flurin D. cc
    Ding, Bowen
    Wenzel, Jonas
    Holicky, Martin
    Tsetseris, Leonidas
    Anthopoulos, Thomas D. cc
    Heeney, Martin cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    KAUST Grant Number
    OSR-2020-CRG8-4095
    OSR-2018-CARF/CCF-3079
    Date
    2021-12-17
    Embargo End Date
    2022-12-17
    Permanent link to this record
    http://hdl.handle.net/10754/675005
    
    Metadata
    Show full item record
    Abstract
    Small band gap molecular semiconductors are of interest for the development of transparent electronics. Here we report two near-infrared (NIR), n-type small molecule semiconductors, based upon an acceptor-donor-acceptor (A-D-A) approach. We show that the inclusion of molecular spacers between the strong-electron-accepting end group, 2,1,3-benzothiadiazole-4,5,6-tricarbonitrile, and the donor core affords semiconductors with very low band gaps down to 1 eV. Both materials were synthesized by a one-pot, 6-fold nucleophilic displacement of a fluorinated precursor by cyanide. Significant differences in solid-state ordering and charge carrier mobility are observed depending on the nature of the spacer, with a thiophene spacer resulting in solution processed organic field-effect transistors (OFETs) exhibiting excellent electron mobility up to 1.1 cm2 V-1 s-1. The use of silver nanowires as the gate electrode enables the fabrication of a semitransparent OFET device with an average visible transmission of 71% in the optical spectrum.
    Citation
    Kafourou, P., Nugraha, M. I., Nikitaras, A., Tan, L., Firdaus, Y., Aniés, F., … Heeney, M. (2021). Near-IR Absorbing Molecular Semiconductors Incorporating Cyanated Benzothiadiazole Acceptors for High-Performance Semitransparent n-Type Organic Field-Effect Transistors. ACS Materials Letters, 165–174. doi:10.1021/acsmaterialslett.1c00635
    Sponsors
    The authors thank the Engineering and Physical Sciences Research Council (EPSRC) (EP/L016702/1 and EP/T028513/1), Global Research Laboratory Program of the National Research Foundation (NRF-2017K1A1A2013153), the Royal Society, and the Wolfson Foundation (Royal Society Wolfson Fellowship) for funding. M.I.N., M.H., and T.D.A. acknowledge funding from the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award Nos. OSR-2018-CARF/CCF-3079 and OSR-2020-CRG8-4095. F.E. thanks EPSRC for support via a Doctoral Prize Fellowship.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Materials Letters
    DOI
    10.1021/acsmaterialslett.1c00635
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsmaterialslett.1c00635
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsmaterialslett.1c00635
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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