Thin film morphology and ion interaction behaviour of functional polymers for iontronic applications |
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Authors: | FP Wenzl A Fian A Rudorfer |
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Affiliation: | a Institute of Nanostructured Materials and Photonics, Joanneum Research Forschungsges.mbH, Franz-Pichler Straße 30, A-8160 Weiz, Austria b Institute for Electron Microscopy, Graz University of Technology, Steyrergasse 17, A-8010 Graz, Austria c Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, A-8010 Graz, Austria |
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Abstract: | Based on comprehensive studies by scanning electron microscopy (SEM), atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) we report on the morphology and the ion-ion as well as the ion-polymer interaction properties of thin spin-cast films comprising an oligo(ethylene oxide) (OEO) grafted poly(p-phenylene) blended with either lithium- or tetrabutylammonium trifluoromethanesulfonate. Assuming that the ionic species intercalate within the OEO side-chain matrix, the covalent attachment of OEO appears to be an appropriate strategy to overcome the generally observed phenomenon of large-scale phase-separations between conjugated polymers and solid-state electrolytes. XPS turns out to be a suitable approach to study the basics of the ion-ion and the ion-polymer interactions of these model systems directly for the thin, spin-cast films. |
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Keywords: | Light-emitting electrochemical cell Polymeric mixed ionic-electronic conductors X-ray photoelectron spectroscopy Polymer electrolyte Vibrational spectroscopy |
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