A simple model for ion injection and transport in conducting polymers

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[1] Stavrinidou, Eleni
[2] Leleux, Pierre
[3] Rajaona, Harizo
[4] Fiocchi, Michel
[5] Sanaur, Sébastien
[6] Malliaras, George G.
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| 1600年 / American Institute of Physics Inc.卷 / 113期
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We present a simple analytical model that describes ion transport in a planar junction between an electrolyte and a conducting polymer film. When ions are injected in the film; holes recede; leading to partial dedoping of the film. This is modeled by two resistors in series; an ionic one for the dedoped part and an electronic one for the still-doped part. We show that analytical predictions can be made for the temporal evolution of the drift length of ions and the current; variables that could be assessed experimentally. A numerical model based on forward time iteration of drift/diffusion equations is used to validate these predictions. Using realistic materials parameters; we find that the analytical model can be used to obtain the ion drift mobility in the film; and as such; it might be useful towards the development of structure vs. ion transport properties relationships in this important class of electronic materials. © 2013 AIP Publishing LLC;
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