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    Trace Solvent Additives Enhance Charge Generation in Layer-by-Layer Coated Organic Solar Cells

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    Name:
    Small Structures - 2022 - Karuthedath - Trace Solvent Additives Enhance Charge Generation in Layer‐by‐Layer Coated Organic.pdf
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    1.443Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2023-02-09
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    Type
    Article
    Authors
    Karuthedath, Safakath cc
    Firdaus, Yuliar cc
    Scaccabarozzi, Alberto D. cc
    Insan Nugraha, Mohamad
    Alam, Shahidul
    Anthopoulos, Thomas D. cc
    Laquai, Frédéric cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    KAUST Solar Center (KSC)
    Physical Sciences and Engineering Division (PSE) Material Science and Engineering Program (MSE) King Abdullah University of Science and Technology (KAUST) KAUST Solar Center (KSC) Thuwal 23955-6900 Kingdom of Saudi Arabia
    Material Science and Engineering Program
    KAUST Grant Number
    OSR-2019-CARF/CCF-3079
    OSR-CRG2018-3746
    Date
    2022-02-09
    Embargo End Date
    2023-02-09
    Submitted Date
    2021-11-09
    Permanent link to this record
    http://hdl.handle.net/10754/675498
    
    Metadata
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    Abstract
    In bulk heterojunction (BHJ) organic solar cells (OSC), the photoactive layer morphology controls charge carrier generation, transport, and extraction. Obtaining the ‘optimum’ morphology is often achieved by empiric optimization of processing conditions and post-processing treatment. Better control over the morphology can be achieved by sequential photoactive layer-by-layer (LbL) deposition techniques, creating a pseudo-bilayer OSC. Solvent additives can be used to modify the vertical component distribution, thereby enhancing OSC efficiency. However, the impact of solvent additives on device photophysics is often unclear. Here, the photophysics of LbL-coated PM6/Y6 organic solar cells are reported. Enhanced PCEs are observed when using 1-chloronaphthalene (CN) as solvent additive. Transient absorption (TA) spectroscopy indicates that the addition of 0.5% CN facilitates both exciton dissociation and charge separation, while excessive (>1%) use of CN causes fast geminate and non-geminate charge recombination and consequently deteriorates device performance. The results outline routes to fine-tune the morphology of LbL-coated photoactive layers of OSCs and provide insight into the reasons for increased PCEs.
    Citation
    Karuthedath, Firdaus, Y., Scaccabarozzi, A. D., Insan Nugraha, M., Alam, S., Anthopoulos, T. D., & Laquai, F. (2022). Trace Solvent Additives Enhance Charge Generation in Layer-by-Layer Coated Organic Solar Cells. Small Structures. Portico. https://doi.org/10.1002/sstr.202100199
    Sponsors
    This publication is based on work supported by the KAUST Office of Sponsored Research (OSR) under award numbers OSR-2019-CARF/CCF-3079and OSR-CRG2018-3746.GIWAXS experiments were performed at BL11 NCD-SWEET beamlineat ALBA Synchrotron (Spain) with the collaboration of ALBA staff.
    Publisher
    Wiley
    Journal
    Small Structures
    DOI
    10.1002/sstr.202100199
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1002/sstr.202100199
    ae974a485f413a2113503eed53cd6c53
    10.1002/sstr.202100199
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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