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Search: WFRF:(Mantovani Nardes Alexandre)

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  • Mantovani Nardes, Alexandre, et al. (author)
  • A morphological model for the solvent-enhanced conductivity of PEDOT : PSS thin films
  • 2008
  • In: Advanced Functional Materials. - : Wiley-VCH Verlag. - 1616-301X .- 1616-3028. ; 18:6, s. 865-871
  • Journal article (peer-reviewed)abstract
    • The well-known enhanced conductivity of poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) thin films that is obtained by addition of high-boiling solvents like sorbitol to the aqueous dispersion used for film deposition is shown to be associated with a rearrangement of PEDOT-rich clusters into elongated domains, as evidenced from STM and AFM. Consistently, temperature dependent conductivity measurements for sorbitol-treated films reveal that charge transport occurs via quasi ID variable range hopping (VRH), in contrast to 3D VRH for untreated PEDOT:PSS films. The typical hopping distance of 60-90 nm, extracted from the conductivity measurements is consistent with hopping between the 30-40 nm sized grains observed with scanning probe microscopy.
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2.
  • Mantovani Nardes, Alexandre, et al. (author)
  • Microscopic understanding of the anisotropic conductivity of PEDOT : PSS thin films
  • 2007
  • In: Advanced Materials. - : Wiley-VCH Verlag. - 0935-9648 .- 1521-4095. ; 19:9, s. 1196-
  • Journal article (peer-reviewed)abstract
    • The amsotropic conductivity of thin films of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is correlated to the film morphology as obtained from scanning tunneling and atomic force microscopy images. The material was found to consist of layers of flattened PEDOT-rich particles that are separated by quasi-continuous PSS lamella (see figure).
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