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 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.
| Original language | English |
|---|---|
| Pages (from-to) | 865-871 |
| Journal | Advanced Functional Materials |
| Volume | 18 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2008 |
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Nardes, A. M., Janssen, R. A. J., & Kemerink, M. (2008). A morphological model for the solvent-enhanced conductivity of PEDOT:PSS thin films. Advanced Functional Materials, 18(6), 865-871. https://doi.org/10.1002/adfm.200700796