Molecular Reorientation and Structural Changes in Cosolvent-Treated Highly Conductive PEDOT:PSS Electrodes for Flexible Indium Tin Oxide-Free Organic Electronics
| Autor: | Volker Körstgens, Christoph J. Schaffer, Peter Müller-Buschbaum, Claudia M. Palumbiny, Gonzalo Santoro, Christoph Heller, Stephan V. Roth |
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| Rok vydání: | 2014 |
| Předmět: |
Organic electronics
Materials science Scanning electron microscope Nanotechnology Conductivity Conjugated system Surfaces Coatings and Films Electronic Optical and Magnetic Materials Indium tin oxide chemistry.chemical_compound Crystallinity General Energy Chemical engineering chemistry PEDOT:PSS Physical and Theoretical Chemistry Ethylene glycol |
| Zdroj: | The Journal of Physical Chemistry C. 118:13598-13606 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Cosolvent addition of glycerol (G) and the use of the cosolvent ethylene glycol (EG) increase the conductivity of poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS) films to values on the order of indium tin oxide conductivity. The underlying morphological changes are probed via scanning electron microscopy as well as advanced scattering techniques microfocused grazing incidence small- and wide-angle X-ray scattering. The enhancement in conductivity is ascribed to fundamental morphological changes and molecular reorientation within crystalline domains. Thereby, the conductivity enhancement is directly correlated to domain ruptures toward smaller and more densely packed PEDOT domains together with an enhanced crystallinity, the removal of PSS molecules, and moreover a reorientation of the conjugated PEDOT molecules. The latter is reported and quantified here for PEDOT:PSS films for the first time. |
| Databáze: | OpenAIRE |
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