Cyclopentadithiophene Bridged Donor–Acceptor Dyes Achieve High Power Conversion Efficiencies in Dye-Sensitized Solar Cells Based on the tris-Cobalt Bipyridine Redox Couple

Authors

  • Dr. Hoi Nok Tsao ,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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    • These authors contributed equally to this manuscript.

  • Dr. Chenyi Yi ,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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    • These authors contributed equally to this manuscript.

  • Dr. Thomas Moehl,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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  • Dr. Jun-Ho Yum,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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  • Dr. Shaik M. Zakeeruddin,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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  • Dr. Mohammed K. Nazeeruddin,

    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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  • Prof. Michael Grätzel

    Corresponding author
    1. École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
    • École Polytechnique Fédérale de Lausanne, Institute of Chemical Sciences and Engineering, Laboratory of Photonics and Interfaces, 1015 Lausanne (Switzerland), Fax: (+41) 21 6936111
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Abstract

original image

Good Co-op: A novel cyclopentadithiophene-bridged donor–acceptor dye applied as sensitizer in mesoscopic dye-sensitized solar cells, in conjunction with the cobalt complexes [CoII(bpy)3](B(CN)4)2 and [CoIII(bpy)3](B(CN)4)3 as redox couple, yields high power conversion efficiencies (up to 9.6 %) under standard AM 1.5G solar irradiation. The results confirm that cobalt complexes are legitimate alternatives to the commonly used I/I3 redox shuttle when used with judiciously engineered organic sensitizers.

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