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A morphological model for the solvent-enhanced conductivity of PEDOT : PSS thin films
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- Mantovani Nardes, Alexandre (author)
- Eindhoven University of Technology, Netherlands
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- Janssen, Rene A. J. (author)
- Eindhoven University of Technology, Netherlands
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- Kemerink, Martijn (author)
- Eindhoven University of Technology, Netherlands
- (creator_code:org_t)
- Wiley-VCH Verlag, 2008
- 2008
- English.
- In: Advanced Functional Materials. - : Wiley-VCH Verlag. - 1616-301X .- 1616-3028. ; 18:6, s. 865-871
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
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- art (subject category)
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