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    Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer

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    AEM_revision_finalR1.pdf
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    Type
    Article
    Authors
    Khan, Jafar Iqbal cc
    Alamoudi, Maha A cc
    Chaturvedi, Neha cc
    Ashraf, Raja
    Nabi, Mohammed N.
    Markina, Anastasia
    Liu, Wenlan
    Dela Peña, Top Archie
    Zhang, Weimin
    Alévêque, Olivier
    Harrison, George T.
    Alsufyani, Wejdan
    Levillain, Eric
    De Wolf, Stefaan cc
    Andrienko, Denis
    McCulloch, Iain cc
    Laquai, Frédéric cc
    KAUST Department
    Chemical Science Program
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-2018-CARF/CCF-3079
    OSR-CRG2018-3746
    Date
    2021-05-24
    Online Publication Date
    2021-05-24
    Print Publication Date
    2021-07
    Embargo End Date
    2022-05-24
    Submitted Date
    2021-03-12
    Permanent link to this record
    http://hdl.handle.net/10754/669241
    
    Metadata
    Show full item record
    Abstract
    Advancing non-fullerene acceptor (NFA) organic photovoltaics requires the mitigation of the efficiency-limiting processes. Acceptor end-group and side-chain engineering are two handles to tune properties, and a better understanding of their specific impact on the photophysics could facilitate a more guided acceptor design. Here, the device performance, energetic landscape, and photophysics of rhodanine and dicyanovinyl end-capped IDT-based NFAs, namely, O-IDTBR and O-IDTBCN, in PCE10-based solar cells are compared by transient optical and electro-optical spectroscopy techniques and density functional theory calculations. It is revealed how the acceptors’ quadrupole moments affect the interfacial energetic landscape, in turn causing differences in exciton quenching, charge dissociation efficiencies, and geminate versus non-geminate recombination losses. More precisely, it is found that the open circuit voltage (VOC) is controlled by the acceptors’ electron affinity (EA), while geminate and non-geminate recombination, and the field dependence of charge generation, rely on the acceptors’ quadrupole moments. The kinetic parameters and yields of all processes are determined, and it is demonstrated that they can reproduce the performance differences of the devices’ current–voltage characteristics in carrier drift-diffusion simulations. The results provide insight into the impact of the energetic landscape, specifically the role of the quadrupole moment of the acceptor, beyond trivial considerations of the donor–acceptor energy offsets.
    Citation
    Khan, J. I., Alamoudi, M. A., Chaturvedi, N., Ashraf, R. S., Nabi, M. N., Markina, A., … Laquai, F. (2021). Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer. Advanced Energy Materials, 2100839. doi:10.1002/aenm.202100839
    Sponsors
    J.I.K. and M.A.A. contributed equally to this work. 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 and Award No. OSR-CRG2018-3746. D.A. acknowledges funding from the BMBF grant InterPhase and MESOMERIE (FKZ 13N13661, FKZ 13N13656) and the European Union Horizon 2020 research and innovation program “Widening materials models” under Grant Agreement No. 646259 (MOSTOPHOS). D.A. also acknowledges the KAUST PSE Division for hosting his sabbatical in the framework of the Division's Visiting Faculty program. A.M. acknowledges funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 844655 (SMOLAC). J.I.K. and F.L. thank R. Lohmann and D. Gottlieb for their contributions to the development of the EL spectroscopy setup.
    Publisher
    Wiley
    Journal
    Advanced Energy Materials
    DOI
    10.1002/aenm.202100839
    10.1002/aenm.202170109
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1002/aenm.202100839
    ae974a485f413a2113503eed53cd6c53
    10.1002/aenm.202100839
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; KAUST Solar Center (KSC)

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