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    Exploiting ternary blends for improved photostability in high efficiency organic solar cells

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    Name:
    E_explointing.pdf
    Size:
    1.327Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2021-03-31
    Download
    Type
    Article
    Authors
    Gasparini, Nicola
    Paleti, Sri Harish Kumar
    Bertrandie, Jules
    Cai, Guilong
    Zhang, Guichuan
    Wadsworth, Andrew
    Lu, Xinhui
    Yip, Hin-Lap
    McCulloch, Iain
    Baran, Derya cc
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2020-03-31
    Online Publication Date
    2020-03-31
    Print Publication Date
    2020-05-08
    Embargo End Date
    2021-03-31
    Permanent link to this record
    http://hdl.handle.net/10754/662436
    
    Metadata
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    Abstract
    Ternary organic solar cells based on polymer donor and nonfullerene acceptors (NFAs) are delivering high power conversion efficiencies (PCE). Now, further improvement needs to be directed to enhance the operational lifetime of organic photovoltaics. Here, we selected three NFAs with different electron affinities and structural properties and found that the most crystalline third component, O-IDTBR, is selectively miscible within the acceptor phase. This reduced trap-assisted recombination and delivered a PCE of 16.6% and a fill factor of 0.76, compared to PM6:Y6 binary devices (15.2% PCE). Charge transport and recombination analyses revealed that O-IDTBR acts as a charge relay for improved charge transfer of both donor and acceptor materials leading to a more ordered transport. We find that minimizing traps formation in ternary devices deactivates light-induced traps upon full sun illumination (AM1.5G). As a result, ternary devices do not show any PCE drop in 225h, in comparison to binary cells which lose more than 60% of their initial performances
    Citation
    Gasparini, N., Paleti, S. H. K., Bertrandie, J., Cai, G., Zhang, G., Wadsworth, A., … Baran, D. (2020). Exploiting ternary blends for improved photostability in high efficiency organic solar cells. ACS Energy Letters. doi:10.1021/acsenergylett.0c00604
    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. H.-L. Yip acknowledges the Ministry of Science and Technology (No. 2019YFA0705900) for financial support. N.Gasparini and S.H.K. Paleti contributed equally in this work.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Energy Letters
    DOI
    10.1021/acsenergylett.0c00604
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsenergylett.0c00604
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsenergylett.0c00604
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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