25 August 2017 Effect of core modification in star-shaped donor-acceptor oligomers on physical properties and photovoltaic performance
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Abstract
A series of star-shaped donor-acceptor oligomers having alkyldicyanovinyl fragments as electron-withdrawing groups, 2,2′-bithiophene as a conjugated π-bridge and either triphenylamine or its modified analogs (9-phenyl-9H-carbazole derivatives or tris(2-methoxyphenyl)amine as electron-donating cores was designed, synthesized and investigated. Variation of the chemical nature of the donor core allowed elucidating the structure-properties relationships for their solubility, absorption spectra, electrochemistry, phase behavior as well as photovoltaic performance in bulk heterojunction organic solar cells as donor materials in their mixtures with PC70BM. The star-shaped molecules based on triphenylamine and tris(2-methoxyphenyl)amine cores have reduced bandgaps, which leads to more efficient absorption of the sun light and better photovoltaic performance.
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Yuriy N. Luponosov, Yuriy N. Luponosov, Alexander N. Solodukhin, Alexander N. Solodukhin, Vasiliy A. Trukhanov , Vasiliy A. Trukhanov , Dmitry Yu. Paraschuk, Dmitry Yu. Paraschuk, Svetlana M. Peregudova, Svetlana M. Peregudova, Petr V. Dmitryakov, Petr V. Dmitryakov, Sergei N. Chvalun, Sergei N. Chvalun, Sergey A. Ponomarenko, Sergey A. Ponomarenko, } "Effect of core modification in star-shaped donor-acceptor oligomers on physical properties and photovoltaic performance", Proc. SPIE 10363, Organic, Hybrid, and Perovskite Photovoltaics XVIII, 103632R (25 August 2017); doi: 10.1117/12.2273805; https://doi.org/10.1117/12.2273805
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