Journal article

Self-assembly of rod-coil block copolymers for photovoltaic applications

  • Sary, Nicolas Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Rubatat, Laurent Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland
  • Brochon, Cyril Laboratoire d'Ingénierie des Polymères pour les Hautes Technologies, Université Louis Pasteur, Strasbourg, France
  • Hadziioannou, Georges Laboratoire d'Ingénierie des Polymères pour les Hautes Technologies, Université Louis Pasteur, Strasbourg, France
  • Mezzenga, Raffaele Department of Physics and Fribourg Center for Nanomaterials, University of Fribourg, Switzerland - Nestlé Research Center, Lausann, Switzerland
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    12.11.2008
Published in:
  • Macromolecular Symposia. - 2008, vol. 268, no. 1, p. 28-32
English Two different approaches to obtain electron donor-acceptor interfaces via self-assembly of block copolymer systems are discussed, where the donor domains are formed by a π-conjugated rod-like polymer and the acceptor domains result from a coiled polymer modified by C₆₀ fullerenes. In the first strategy, C₆₀ is chemically grafted onto the coil polymer, typically a statistical copolymer of styrene and chloromethyl styrene. This has as major effect the increase in molecular weight and volume fraction of the coil block, which can markedly perturb the self-assembled block copolymer final morphologies and eventually suppress any microseparated nanostructure in favour of fully isotropic homogeneous phases. We discuss how the presence of free homopolymer rods in the system can help recovering a microphase separated morphology suitable for photovoltaic applications. In the second approach we discuss the poly(diethylhexyl-p-phenylenevinylene-b-4-vinylpyridine) (PPV-P4VP) rod-coil block copolymer system and we argue how supramolecular interactions among P4VP and free C₆₀ can be exploited to blend rod-coil block copolymers and C₆₀ preserving the original lamellar phase.
Faculty
Faculté des sciences
Department
Physique
Language
  • English
Classification
Physics
License
License undefined
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Persistent URL
https://folia.unifr.ch/unifr/documents/300915
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