Subdiffusion behavior in poly(3,4-ethylenedioxythiophene): Polystyrene sulfonate (PEDOT:PSS) evidenced by electrochemical impedance spectroscopy

Hernandez-Labrado GR; Contreras-Donayre RE; Collazos-Castro JE; Polo JL

Journal of Electroanalytical Chemistry, Vol.659, No.2, 201-204, 2011

DOI10.1016/j.jelechem.2011.05.008 Export Citation

Subdiffusion behavior in poly(3,4-ethylenedioxythiophene): Polystyrene sulfonate (PEDOT:PSS) evidenced by electrochemical impedance spectroscopy

Hernandez-Labrado GR, Contreras-Donayre RE, Collazos-Castro JE, Polo JL

We have obtained impedance measurements of PEDOT:PSS films and propose a novel interpretation for electrical charge transport mechanisms in the polymer. A parabolic subdiffusion model produced excellent fitting for the impedance data, suggesting that anomalous ion diffusion limits charge transfer through the nanoporous film. (C) 2011 Elsevier B.V. All rights reserved.

Keywords:Electrochemical impedance spectroscopy;Conducting polymers;Poly(3,4-ethylenedioxythiophene);PEDOT;Subdiffusion impedance;Anomalous diffusion