Get access
Advanced Functional Materials

Synthesis and Characterization of New Thieno[3,4-c]pyrrole-4,6-dione Derivatives for Photovoltaic Applications

Authors

  • Ahmed Najari,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    Search for more papers by this author
  • Serge Beaupré,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    Search for more papers by this author
  • Philippe Berrouard,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    Search for more papers by this author
  • Yingping Zou,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    Search for more papers by this author
  • Jean-Rémi Pouliot,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    Search for more papers by this author
  • Charlotte Lepage-Pérusse,

    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    Search for more papers by this author
  • Mario Leclerc

    Corresponding author
    1. Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada
    • Canada Research Chair on Electroactive and Photoactive Polymers, Department of Chemistry, Université Laval, Quebec City, Quebec, G1V 0A6, Canada.
    Search for more papers by this author

Abstract

A new class of low-bandgap copolymers based on benzodithiophene (BDT) and thieno[3,4-c]pyrrole-4,6-dione (TPD) units is reported. Chemical modifications of the conjugated backbone promote both high molecular weights and processability while allowing for tuning of the electronic properties. Copolymers with substituted thiophene spacers (alkyl chains facing the BDT unit) or unsubstituted thiophene spacers tend to have low power conversion efficiencies (PCE less than 1%) due to a bad morphology of the active layer, whereas copolymers with substituted thiophene spacers (alkyl chains facing TPD unit) show enhanced morphology and PCEs up to of 3.9%. Finally, BDT-TPD copolymers without any thiophene spacers still show the best performances with power conversion efficiencies up to 5.2%.

Get access to the full text of this article

Ancillary