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A morphological model for the solvent-enhanced conductivity of PEDOT:PSS thin films

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...

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Bibliographic Details
Main Authors: Mantovani Nardes, Alexandre (Author) , Janssen, René A. J. (Author) , Kemerink, Martijn (Author)
Format: Article (Journal)
Language:English
Published: 26 March 2008
In: Advanced functional materials
Year: 2008, Volume: 18, Issue: 6, Pages: 865-871
ISSN:1616-3028
DOI:10.1002/adfm.200700796
Online Access:Verlag, Volltext: https://doi.org/10.1002/adfm.200700796
Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.200700796
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Author Notes:by Alexandre Mantovani Nardes, René A.J. Janssen, and Martijn Kemerink
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Summary: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 1D 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.
Item Description:Gesehen am 16.12.2019
Physical Description:Online Resource
ISSN:1616-3028
DOI:10.1002/adfm.200700796

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