Poly(3-hexylthiophene) Fibers for Photovoltaic Applications

Authors

  • S. Berson,

    1. CEA—DRFMC/SPrAM/LEMOH, Structures et Propriétés d'Architectures Moléculaires—UMR 5819 Laboratoire d'Electronique Moléculaire Organique et Hybride, 17 rue des Martyrs, 38054 Grenoble cedex 09 (France)
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  • R. De Bettignies,

    1. CEA—DRT/LITEN/DTS/LCS, INES – RDI, Laboratoire des Composants Solaires, 50 avenue du Lac Léman BP 332, 73377 Le Bourget du Lac (France)
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  • S. Bailly,

    1. CEA—DRT/LITEN/DTS/LCS, INES – RDI, Laboratoire des Composants Solaires, 50 avenue du Lac Léman BP 332, 73377 Le Bourget du Lac (France)
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  • S. Guillerez

    1. CEA—DRT/LITEN/DTS/LCS, INES – RDI, Laboratoire des Composants Solaires, 50 avenue du Lac Léman BP 332, 73377 Le Bourget du Lac (France)
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  • We are grateful to Patrice Rannou, David Djurado, and Violaine Salvador for their assistance with SEC analysis, X-ray diffraction measurements, and SEM analysis, respectively. We also acknowledge Muriel Firon for fruitful discussions. Supporting Information is available online from Wiley InterScience or from the author.

Abstract

A new method for the preparation of active layers of polymeric solar cells without the need for thermal post-treatment to obtain optimal performance is presented. Poly(3-hexylthiophene) (P3HT) nanofibers are obtained in highly concentrated solutions, which enables the fabrication of nanostructured films on various substrates. Here, the preparation of these fibers along with their characterization in solution and in the solid state is detailed. By mixing these nanofibers with a molecular acceptor such as [6,6]-phenyl C61-butyric acid methyl ester (PCBM) in solution, it is possible to obtain in a simple process a highly efficient active layer for organic solar cells with a demonstrated power conversion efficiency (PCE) of up to 3.6 %. The compatibility of the room-temperature process developed herein with commonly used plastic substrates may lead to applications such as the development of large-area flexible solar cells.

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