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    Quantification of Photophysical Processes in All-Polymer Bulk Heterojunction Solar Cells

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    Name:
    MS_SolarRRL_revised.pdf
    Size:
    1.877Mb
    Format:
    PDF
    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Albalawi, Ahmed
    Kan, Zhipeng
    Gorenflot, Julien cc
    Guarracino, Paola
    Chaturvedi, Neha cc
    Privitera, Alberto
    Liu, Shengjian
    Gao, Yajun
    Franco, Lorenzo
    Beaujuge, Pierre
    Laquai, Frédéric cc
    KAUST Department
    Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
    Physical Science and Engineering (PSE) Division
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Biological and Environmental Sciences and Engineering (BESE) Division
    KAUST Grant Number
    OSR-2018-CARF/CCF-3079
    Date
    2020-04-28
    Online Publication Date
    2020-04-28
    Print Publication Date
    2020-06
    Submitted Date
    2020-04-02
    Permanent link to this record
    http://hdl.handle.net/10754/662773
    
    Metadata
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    Abstract
    All-polymer solar cells lag behind the state-of-the-art in small molecule nonfullerene acceptor (NFA) bulk heterojunction (BHJ) organic solar cells (OSCs) for reasons still unclear. Herein, the efficiency-limiting processes in all-polymer solar cells are investigated using blends of the common donor polymer PBDT-TS1 with different acceptor polymers, namely P2TPD[2F]T and P2TPDBT[2F]T. Combining data from steady-state optical spectroscopy and time-resolved photoluminescence, transient absorption, and time-delayed collection field experiments, provides not only a concise but also quantitative assessment of the losses due to limited photon absorption, geminate and nongeminate charge carrier recombination, field-dependent charge generation, and inefficient carrier extraction. Although both systems exhibit a similar charge separation efficiency in the absence of external bias, charge separation is significantly enhanced in P2TPDBT[2F]T-based blends when biased. Kinetic parameters obtained via pulsed laser spectroscopy are used to reproduce the experimentally measured device current–voltage (J–V) characteristics and indicate that low fill factors originate either from nongeminate recombination competing with charge extraction, or from a pronounced field dependence of charge generation, depending on the acceptor polymer. The methodology presented here is generic and can be used to quantify the loss processes in BHJ OSCs including both all-polymer and small molecule NFA systems.
    Citation
    Balawi, A. H., Kan, Z., Gorenflot, J., Guarracino, P., Chaturvedi, N., Privitera, A., … Laquai, F. (2020). Quantification of Photophysical Processes in All-Polymer Bulk Heterojunction Solar Cells. Solar RRL, 2000181. doi:10.1002/solr.202000181
    Sponsors
    This publication is based upon work supported by the King AbdullahUniversity of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award No: OSR-2018-CARF/CCF-3079
    Publisher
    Wiley
    Journal
    Solar RRL
    DOI
    10.1002/solr.202000181
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/solr.202000181
    ae974a485f413a2113503eed53cd6c53
    10.1002/solr.202000181
    Scopus Count
    Collections
    Articles; Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC); Biological and Environmental Science and Engineering (BESE) Division; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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