Electronic Transport Properties or Ensembles of Perylene-Substituted Poly-isocyanopeptide Arrays

Christopher Edward Finlayson, Richard H. Friend, Matthijs B. J. Otten, Erik Schwartz, Jeroen. J. L. M. Cornelissen, Roeland. L. M. Nolte, Alan E. Rowan, Paolo Samori, Vicenzo Palermo, Andrea Liscio, Kalina Peneva, Klaus Muellen, Sara Trapani, David Beljonne

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Abstract

The electronic transport properties of stacks of perylene-bis(dicarboximide) (PDI) chromophores, covalently fixed to the side arms of rigid, helical polyisocyanopeptides, are studied using thin-film transistors. In device architectures where the transistor channel lengths are somewhat greater than the average polymer chain length, carrier mobilities of order 10(-3) cm(2) V(-1) s(-1) at 350K are found, which are limited by inter-chain transport processes. The influence of pi-pi interactions on the material properties is studied by using PDIs with and without bulky substituents in the bay area. In order to attain a deeper understanding of both the electronic and the electronic-transport Properties of these systems, studies of self-assembly on surfaces are combined with electronic characterization using Kelvin probe force microscopy, and also a theoretical study of electronic coupling. The use of a rigid polymer backbone as a scaffold to achieve a full control Over the position and orientation of functional groups is of general applicability and interest in the design of building blocks for technologically important functional materials, as well as in more fundamental studies of chromophoric interactions.

Original languageEnglish
Pages (from-to)3947-3955
Number of pages9
JournalAdvanced Functional Materials
Volume18
Issue number24
Early online date18 Nov 2008
DOIs
Publication statusPublished - 22 Dec 2008

Keywords

  • CHARGE-TRANSPORT
  • THIN-FILM TRANSISTORS
  • FIELD-EFFECT TRANSISTORS
  • MOBILITIES
  • DIIMIDES
  • MOLECULAR WIRES
  • CONJUGATED POLYMERS
  • ORGANIC SEMICONDUCTORS
  • NANOFIBERS
  • NETWORKS

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