Advanced Materials

A Low-Bandgap Poly(2,7-Carbazole) Derivative for Use in High-Performance Solar Cells


  • This work was supported by discovery and strategic grants from the Natural Sciences and Engineering Research Council (NSERC) of Canada. N.B. thanks NSERC for a Ph.D. Canada Graduate Scholarships (CGS D). The authors gratefully acknowledge David Gendron for the synthesis of some intermediate compounds.


Polymeric materials are promising for solar cell applications. High-molecular-weight and soluble poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di- 2-thienyl-2',1',3'-benzothiadiazole)] is synthesized by either a Stille or Suzuki coupling reaction. Electrochemical and optical characterization of this thermally and air-stable polymeric material is reported, and bulk heretojunction polymer/fullerene photovoltaic devices are fabricated.

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