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Bilayer order in a polycarbazole-conjugated polymer

Author

Listed:
  • Xinhui Lu

    (Brookhaven National Laboratory)

  • Htay Hlaing

    (Brookhaven National Laboratory
    State University of New York)

  • David S. Germack

    (Brookhaven National Laboratory)

  • Jeff Peet

    (Konarka Technologies)

  • Won Ho Jo

    (Seoul National University)

  • Denis Andrienko

    (Max Planck Institute for Polymer Research)

  • Kurt Kremer

    (Max Planck Institute for Polymer Research)

  • Benjamin M. Ocko

    (Brookhaven National Laboratory)

Abstract

One of the best performing semiconducting polymers used in bulk heterojunction devices is PCDTBT, a polycarbazole derivative with solar-conversion efficiencies as high as 7.2%. Here we report the formation of bilayer ordering in PCDTBT, and postulate that this structural motif is a direct consequence of the polymer's molecular design. This bilayer motif is composed of a pair of backbones arranged side-to-side where the alkyl tails are on the outer side. This is in stark contrast to the monolayer ordering found in other conjugated polymers. The crystalline bilayer phase forms at elevated temperatures and persists after cooling to room temperature. The existence of bilayer ordering, along with its high-packing fraction of conjugated moieties, may guide the synthesis of new materials with improved optoelectronic properties.

Suggested Citation

  • Xinhui Lu & Htay Hlaing & David S. Germack & Jeff Peet & Won Ho Jo & Denis Andrienko & Kurt Kremer & Benjamin M. Ocko, 2012. "Bilayer order in a polycarbazole-conjugated polymer," Nature Communications, Nature, vol. 3(1), pages 1-7, January.
    • Handle: RePEc:nat:natcom:v:3:y:2012:i:1:d:10.1038_ncomms1790
    DOI: 10.1038/ncomms1790
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