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    Self-assembled Monolayer Enables HTL-free Organic Solar Cells with 18% Efficiency and Improved Operational Stability

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    self assembles_acsenergylett.0c01421.pdf
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    Description:
    Accepted Article
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    Type
    Article
    Authors
    Lin, Yuanbao
    Firdaus, Yuliar cc
    Isikgor, Furkan Halis cc
    Nugraha, Mohamad Insan
    Yengel, Emre cc
    Harrison, George T
    Hallani, Rawad
    El Labban, Abdulrahman cc
    Faber, Hendrik cc
    Ma, Chun cc
    Zheng, Xiaopeng
    Subbiah, Anand Selvin
    Howells, Calvyn Travis
    Bakr, Osman cc
    McCulloch, Iain cc
    De Wolf, Stefaan cc
    Tsetseris, Leonidas
    Anthopoulos, Thomas D. cc
    KAUST Department
    Chemical Science Program
    Functional Nanomaterials Lab (FuNL)
    KAUST Catalysis Center (KCC)
    KAUST Solar Center (KSC)
    Material Science and Engineering
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR2018-CARF/CCF-3079
    Date
    2020-08-18
    Online Publication Date
    2020-08-18
    Print Publication Date
    2020-09-11
    Embargo End Date
    2021-08-18
    Permanent link to this record
    http://hdl.handle.net/10754/664824
    
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    Abstract
    We report on bulk-heterojunction (BHJ) organic photovoltaics (OPVs) using the self-assembled monolayer (SAM) 2PACz as a hole-selective interlayer functionalized directly onto the indium tin oxide (ITO) anode. The 2PACz is found to change the work function of ITO while simultaneously affecting the morphology of the BHJ deposited atop. Cells with PM6:N3 BHJ and ITO-2PACz anode exhibit a power conversion efficiency (PCE) of 16.6%, which is higher than that measured for bare ITO (6.45%) and ITO/PEDOT:PSS (15.94%) based devices. The enhanced performance is attributed to lower contact-resistance, reduced bimolecular recombination losses, and improved charge transport within the BHJ. Importantly, the ITO-2PACz-based OPVs show a dramatically improved operational stability when compared with PEDOT:PSS-based cells. When the ITO-2PACz anode is combined with the ternary PM6:BTP-eC9:PC71BM BHJ, the resulting cells exhibit a maximum PCE of 18.03%, further highlighting the potential of engineered SAMs for use in hole-selective contacts in high-performance OPVs.
    Citation
    lin, yuanbao, Firdaus, Y., Isikgor, F. H., Nugraha, M. I., Yengel, E., Harrison, G. T., … Anthopoulos, T. D. (2020). Self-assembled Monolayer Enables HTL-free Organic Solar Cells with 18% Efficiency and Improved Operational Stability. ACS Energy Letters. doi:10.1021/acsenergylett.0c01421
    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: OSR2018-CARF/CCF-3079. L. T. acknowledges support for the computational time granted from GRNET in the National HPC facility -ARIS - under project STEM-2.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Energy Letters
    DOI
    10.1021/acsenergylett.0c01421
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsenergylett.0c01421
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsenergylett.0c01421
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC)

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