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Efficient Methano[70]fullerene/MDMO-PPV Bulk Heterojunction Photovoltaic Cells

Authors

  • Martijn M. Wienk Dr.,

    1. Energy Research Centre of the Netherlands (ECN), Solar Energy, P.O. Box 1, 1755 ZG Petten, The Netherlands, Fax: (+31) 224-56-8214
    2. Present address: Dutch Polymer Institute, Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands
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  • Jan M. Kroon Dr.,

    1. Energy Research Centre of the Netherlands (ECN), Solar Energy, P.O. Box 1, 1755 ZG Petten, The Netherlands, Fax: (+31) 224-56-8214
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  • Wiljan J. H. Verhees,

    1. Energy Research Centre of the Netherlands (ECN), Solar Energy, P.O. Box 1, 1755 ZG Petten, The Netherlands, Fax: (+31) 224-56-8214
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  • Joop Knol Dr.,

    1. Stratingh Institute and MSC, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, Fax: (+31) 50-363-8751
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  • Jan C. Hummelen Prof. Dr.,

    1. Stratingh Institute and MSC, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands, Fax: (+31) 50-363-8751
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  • Paul A. van Hal Dr.,

    1. Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fax: (+31) 40-245-1036
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  • René A. J. Janssen Prof. Dr.

    1. Laboratory of Macromolecular and Organic Chemistry, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, Fax: (+31) 40-245-1036
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  • We thank Sjoerd Veenstra (ECN) for useful discussions, Pascal Jonkheijm (Eindhoven University) for AFM measurements, Jörgen Sweelssen (TNO Industries, Eindhoven) for the polymer synthesis and Patrick van't Hof and Jan Alma (Groningen University) for repeating the [70]PCBM synthesis. These investigations were financially supported by the Dutch Ministries of EZ, O&W, and VROM through the EET program (EETK97115).

Abstract

original image

Owing to their increased absorption of light in the visible region, [70]fullerene derivatives provide a high photocurrent when incorporated as the electron acceptor in thin-film polymer photovoltaic cells. An incident-photon-to-current efficiency of 66 % is obtained when [70]PCBM (see picture) is used in combination with a poly(p-phenylene vinylene). These high currents originate from an ultrafast charge transfer that occurs upon photoexcitation of either the fullerene or the polymer.

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