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    Miscibility-Controlled Phase Separation in Double-Cable Conjugated Polymers for Single-Component Organic Solar Cells with Efficiencies over 8.

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    Name:
    AA_anie.202009272.pdf
    Size:
    1.639Mb
    Format:
    PDF
    Description:
    Accepted article
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    Type
    Article
    Authors
    Jiang, Xudong
    Yang, Jinjin
    Karuthedath, Safakath cc
    Li, Junyu
    Lai, Wenbin
    Li, Cheng
    Xiao, Chengyi
    Ye, Long
    Ma, Zaifei
    Tang, Zheng
    Laquai, Frédéric cc
    Li, Weiwei
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Material Science and Engineering Program
    KAUST Solar Center (KSC)
    Date
    2020-09-23
    Online Publication Date
    2020-09-23
    Print Publication Date
    2020-11-23
    Embargo End Date
    2021-08-21
    Submitted Date
    2020-07-05
    Permanent link to this record
    http://hdl.handle.net/10754/664776
    
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    Abstract
    In this work, a record power conversion efficiency of 8.40% was obtained in single-component organic solar cells (SCOSCs) based on double-cable conjugated polymers. This is realized based on the finding that exciton separation plays the same important role as charge transport in SCOSCs. Herein, we designed two double-cable conjugated polymers with almost the identical conjugated backbones and electron-withdrawing side units, but the extra chlorine (Cl) atoms had different positions on the conjugated backbones. We found that, when Cl atoms were positioned at the main chains, the polymer formed the twist backbones, enabling better miscibility with the naphthalene diimide side units. This could improve the interface contact between conjugated backbones and side units, resulting in efficient conversion of excitons into free charges. These observations were confirmed by systematical studies via several advanced measurements. These findings reveal the importance of charge generation process in SCOSCs and also suggest a strategy to improve this process, that is, controlling the miscibility between conjugated backbones and aromatic side units in double-cable conjugated polymers.
    Citation
    Jiang, X., Yang, J., Karuthedath, S., Li, J., Lai, W., Li, C., … Li, W. (2020). Miscibility-Controlled Phase Separation in Double-Cable Conjugated Polymers for Single-Component Organic Solar Cells with Efficiencies over 8%. Angewandte Chemie International Edition. doi:10.1002/anie.202009272
    Publisher
    Wiley
    Journal
    Angewandte Chemie
    DOI
    10.1002/anie.202009272
    10.1002/ange.202009272
    PubMed ID
    32815586
    Additional Links
    https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202009272
    ae974a485f413a2113503eed53cd6c53
    10.1002/anie.202009272
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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