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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 22: Electrical, Dielectrical and Optical Properties of Thin Films
CPP 22.1: Vortrag
Montag, 16. März 2020, 15:00–15:15, ZEU 114
Ionic liquid post-treatment of PEDOT:PSS thin films to increase their thermoelectric properties — •Anna Lena Oechsle1, Julian Heger1, Nian Li1, Shanshan Yin1, Hartmut Stadler2, Sigrid Bernstorff3, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 2Bruker, AXS Advanced X-ray Solutions GmbH, 76187 Karlsruhe, Germany — 3ELETTRA Sincrotrone Trieste S. C. p. A., AREA Science Park Basovizza, 34149 Trieste, Italy
In times of constantly increasing energy demand, climate change and scarcity of fossil resources thermoelectric materials are of great interest as they enable waste heat recovery and the use of solar thermal energy. In particular thermoelectric polymers are attractive, as in contrast to so far used inorganic materials, they own some advantages like low cost, high mechanical flexibility, low or no toxicity, light weight and intrinsically low thermal conductivity. Thermoelectric properties of materials can generally be evaluated by the so called power factor. This parameter depends on the Seebeck coefficient S and the electrical conductivity σ, which again are affected by the electronic and morphological features of the polymer. In terms of improving both S and σ simultaneously we post-treat fabricated PEDOT:PSS thin films with ionic liquids (ILs). By performing measurements of the Seebeck coefficient, the electrical conductivity, UV-Vis, layer thickness changes and determination of the structure we attempt to find the influence of ILs on the morphology-function relation of the PEDOT:PSS thin films.