[70]Fullerene-Based Materials for Organic Solar Cells

Authors

  • Pavel A. Troshin,

    Corresponding author
    1. Institute of Problems of Chemical Physics of Russian Academy of Sciences, Semenov Prospect 1, Chernogolovka, Moscow region, 142432 (Russia), Fax: (+7) 496-522-3507
    • Institute of Problems of Chemical Physics of Russian Academy of Sciences, Semenov Prospect 1, Chernogolovka, Moscow region, 142432 (Russia), Fax: (+7) 496-522-3507
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  • Harald Hoppe,

    1. Ilmenau University of Technology, Institute of Physics, Weimarer Str. 32, 98693 Ilmenau (Germany)
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  • Alexander S. Peregudov,

    1. A. N. Nesmeyanov Institute of Organoelement Compounds, 1 Vavylova St. 28, B-334, Moscow, 119991 (Russia)
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  • Martin Egginger,

    1. Linz Institute for Organic Solar Cells (LIOS), Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
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  • Sviatoslav Shokhovets,

    1. Ilmenau University of Technology, Institute of Physics, Weimarer Str. 32, 98693 Ilmenau (Germany)
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  • Gerhard Gobsch,

    1. Ilmenau University of Technology, Institute of Physics, Weimarer Str. 32, 98693 Ilmenau (Germany)
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  • N. Serdar Sariciftci,

    1. Linz Institute for Organic Solar Cells (LIOS), Johannes Kepler University Linz, Altenbergerstrasse 69, 4040 Linz (Austria)
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  • Vladimir F. Razumov

    1. Institute of Problems of Chemical Physics of Russian Academy of Sciences, Semenov Prospect 1, Chernogolovka, Moscow region, 142432 (Russia), Fax: (+7) 496-522-3507
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Abstract

The synthesis, characterization and photovoltaic study of two novel derivatives of [70]fullerene, phenyl-C71-propionic acid propyl ester ([70]PCPP) and phenyl-C71-propionic acid butyl ester ([70]PCPB), are reported. [70]PCPP and [70]PCPB outperform the conventional material (6,6)-phenyl-C71-butyric acid methyl ester ([70]PCBM) in solar cells based on poly(2-methoxy-5-{3′,7′-dimethyloctyloxy}-p-phenylene vinylene) (MDMO-PPV) as a donor polymer using chlorobenzene (CB) or dichlorobenzene (DCB) as solvents. AFM data suggest that improvement of the device efficiency should be attributed to the increased phase compatibility between the novel C70 derivatives and the polymer matrix. [70]PCPP and [70]PCBM showed more or less equally high performances in solar cells comprising poly(3-hexylthiophene) (P3HT) as a donor polymer. Optical modeling revealed that the application of [70]fullerene derivatives as acceptor materials in P3HT-based bulk heterojunction solar cells might give approximately 10 % higher short circuit current densities than using C60-based materials such as [60]PCBM. The high solubility of [70]PCPP and [70]PCPB and their good compatibility with the donor polymers suggest these fullerene derivatives as promising electron acceptor materials for use in efficient bulk heterojunction organic solar cells.

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