A physical interpretation of impedance at conducting polymer/electrolyte junctions

Eleni Stavrinidou, Michele Sessolo, Bjorn Winther Jensen, Sébastien Sanaur, George G. Malliaras*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We monitor the process of dedoping in a planar junction between an electrolyte and a conducting polymer using electrochemical impedance spectroscopy performed during moving front measurements. The impedance spectra are consistent with an equivalent circuit of a time varying resistor in parallel with a capacitor. We show that the resistor corresponds to ion transport in the dedoped region of the film, and can be quantitatively described using ion density and drift mobility obtained from the moving front measurements. The capacitor, on the other hand, does not depend on time and is associated with charge separation at the moving front. This work offers a physical description of the impedance of conducting polymer/electrolyte interfaces based on materials parameters.

Original languageEnglish
Article number017127
JournalAIP Advances
Issue number1
Publication statusPublished - 2014 Jan
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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