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A New Poly(2,7-Dibenzosilole) Derivative in Polymer Solar Cells

Authors

  • Pierre-Luc T. Boudreault,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Département de Chimie, Université Laval, Quebec City, Quebec, G1K 7P4, Canada
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  • Alexandre Michaud,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Département de Chimie, Université Laval, Quebec City, Quebec, G1K 7P4, Canada
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  • Mario Leclerc

    Corresponding author
    1. Canada Research Chair on Electroactive and Photoactive Polymers, Département de Chimie, Université Laval, Quebec City, Quebec, G1K 7P4, Canada
    • Canada Research Chair on Electroactive and Photoactive Polymers, Département de Chimie, Université Laval, Quebec City, Quebec, G1K 7P4, Canada.
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Abstract

A new soluble conjugated copolymer based on 2,7-dibenzosilole and 4,7-dithien-2-yl-2,1,3-benzothiadiazole units has been synthesized (PBSDTBT). Bulk heterojunction solar cell devices are fabricated using this material as the donor and [6,6]-phenyl-C61 butyric acid methyl ester (PCBM) as the acceptor. The power conversion efficiency is 1.6% under AM1.5 illumination. This material also shows a good VOC (0.97 V). The results are quite promising considering the relatively large bandgap (1.9 eV) of this polymer.

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