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  • Title: Alternative Thieno[3,2-b][1]benzothiophene Isoindigo Polymers for Solar Cell Applications.
    Author: Neophytou M, Bryant D, Lopatin S, Chen H, Hallani RK, Cater L, McCulloch I, Yue W.
    Journal: Macromol Rapid Commun; 2018 Jul; 39(14):e1700820. PubMed ID: 29504170.
    Abstract:
    This work reports the synthesis, characterization, photophysical, and photovoltaic properties of five new thieno[3,2-b][1]benzothiophene isoindigo (TBTI)-containing low bandgap donor-acceptor conjugated polymers with a series of comonomers and different side chains. When TBTI is combined with different electron-rich moieties, even small structural variations can have significant impact on thin film morphology of the polymer:phenyl C70 butyric acid methyl ester (PCBM) blends. More importantly, high-resolution electron energy loss spectroscopy is used to investigate the phase-separated bulk heterojunction domains, which can be accurately and precisely resolved, enabling an enhanced correlation between polymer chemical structure, photovoltaic device performance, and morphology.
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