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    미래를 창조하는 포스텍 화학공학과

    Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Novel Pentafluorobenzene-Based Additive

    Title of paper
    Morphological Control of Donor/Acceptor Interfaces in All-Polymer Solar Cells Using a Novel Pentafluorobenzene-Based Additive
    Author
    [박태호교수 연구실]
    Publication in journal
    Chemical of Materials 2017, 29 (16), pp 6793–6798
    Publication date
    20170725
     
    [abstract]
    We report a pentafluorobenzene-based additive (FPE) to control the donor/acceptor (D/A) interfacial morphology via quadrupolar electrostatic interactions between donor and acceptor polymers in all-polymer solar cells (all-PSCs). The morphology changes are investigated using a combination of atomic force microscopy, grazing incidence wide-angle X-ray scattering, and near-edge X-ray absorption fine-structure spectroscopy. Unlike a conventional solvent additive, such as 1,8-diiodooctane, a bicontinuous interpenetrating morphology without large-scale phase separation and an enhanced π−π stacking with face-on orientation are found in the FPE processed blended films. These morphology changes improve the charge carrier extraction and charge transport between D/A interfaces to achieve an increase in the photovoltaic performance of all-PSCs.
     
    DOI: 10.1021/acs.chemmater.7b01718
    LINK: http://pubs.acs.org/doi/abs/10.1021/acs.chemmater.7b01718