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    17% Efficient Organic Solar Cells Based on Liquid Exfoliated WS2 as a Replacement for PEDOT:PSS

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    Name:
    Lin et al., Adv. Mater. 2019.pdf
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    Accepted manuscript
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    Type
    Article
    Authors
    Lin, Yuanbao cc
    Adilbekova, Begimai cc
    Firdaus, Yuliar cc
    Yengel, Emre cc
    Faber, Hendrik cc
    Sajjad, Muhammad
    Zheng, Xiaopeng
    Yarali, Emre cc
    Seitkhan, Akmaral cc
    Bakr, Osman cc
    El Labban, Abdulrahman cc
    Schwingenschlögl, Udo cc
    Tung, Vincent cc
    McCulloch, Iain cc
    Laquai, Frédéric cc
    Anthopoulos, Thomas D. cc
    KAUST Department
    Chemical Science Program
    Computational Physics and Materials Science (CPMS)
    Functional Nanomaterials Lab (FuNL)
    KAUST Catalysis Center (KCC)
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    Award No. OSR-2018-CARF/CCF-3079.
    Date
    2019-09-30
    Embargo End Date
    2020-10-01
    Permanent link to this record
    http://hdl.handle.net/10754/658572
    
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    Abstract
    The application of liquid-exfoliated 2D transition metal disulfides (TMDs) as the hole transport layers (HTLs) in nonfullerene-based organic solar cells is reported. It is shown that solution processing of few-layer WS2 or MoS2 suspensions directly onto transparent indium tin oxide (ITO) electrodes changes their work function without the need for any further treatment. HTLs comprising WS2 are found to exhibit higher uniformity on ITO than those of MoS2 and consistently yield solar cells with superior power conversion efficiency (PCE), improved fill factor (FF), enhanced short-circuit current (JSC), and lower series resistance than devices based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) and MoS2. Cells based on the ternary bulk-heterojunction PBDB-T-2F:Y6:PC71BM with WS2 as the HTL exhibit the highest PCE of 17%, with an FF of 78%, open-circuit voltage of 0.84 V, and a JSC of 26 mA cm−2. Analysis of the cells' optical and carrier recombination characteristics indicates that the enhanced performance is most likely attributed to a combination of favorable photonic structure and reduced bimolecular recombination losses in WS2-based cells. The achieved PCE is the highest reported to date for organic solar cells comprised of 2D charge transport interlayers and highlights the potential of TMDs as inexpensive HTLs for high-efficiency organic photovoltaics.
    Citation
    Lin, Y., Adilbekova, B., Firdaus, Y., Yengel, E., Faber, H., Sajjad, M., … Anthopoulos, T. D. (2019). 17% Efficient Organic Solar Cells Based on Liquid Exfoliated WS2 as a Replacement for PEDOT:PSS. Advanced Materials, 1902965. doi:10.1002/adma.201902965
    Sponsors
    This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No. OSR-2018-CARF/CCF-3079.
    Publisher
    Wiley
    Journal
    Advanced Materials
    DOI
    10.1002/adma.201902965
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201902965
    ae974a485f413a2113503eed53cd6c53
    10.1002/adma.201902965
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; Computational Physics and Materials Science (CPMS); KAUST Catalysis Center (KCC); KAUST Solar Center (KSC)

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