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A 9,9′-bifluorenylidene derivative containing four 1,1-dicyanomethylene-3-indanone end-capped groups as an electron acceptor for organic photovoltaic cells

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Abstract

A 9,9′-bifluorenylidene derivative, 2,2′,2′′,2′′′-([9,9′-bifluorenylidene]-2,2′,7,7′-tetrayltetrakis(4-octylthiophene-5,2-diyl))tetrakis(methanylylidene)tetrakis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene)tetramalononitrile (BF-TDCI4), was synthesized as an electron acceptor for organic photovoltaic cells. Its photophysical and electrochemical properties and thermal stability were investigated systematically. The photovoltaic devices were fabricated using PTB7-Th as the electron donor and BF-TDCI4 as the electron acceptor at various composition ratios. The optimized device exhibited a maximum power conversion efficiency of 4.35% with an open-circuit voltage of 0.87 V.

Graphical abstract: A 9,9′-bifluorenylidene derivative containing four 1,1-dicyanomethylene-3-indanone end-capped groups as an electron acceptor for organic photovoltaic cells

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Publication details

The article was received on 21 May 2019, accepted on 21 Oct 2019 and first published on 21 Oct 2019


Article type: Paper
DOI: 10.1039/C9NJ02604E
New J. Chem., 2019, Advance Article

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    A 9,9′-bifluorenylidene derivative containing four 1,1-dicyanomethylene-3-indanone end-capped groups as an electron acceptor for organic photovoltaic cells

    T. Yu, Q. Yang, T. Zhang, Y. Zhao, C. Wei, Y. Li, H. Zhang and D. Hu, New J. Chem., 2019, Advance Article , DOI: 10.1039/C9NJ02604E

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