SKM 2021 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 5: Poster Session I

CPP 5.1: Poster

Dienstag, 28. September 2021, 17:30–19:30, P

Thermal degradation of EMIM DCA post-treated PEDOT:PSS thermoelectric thin films, investigated via in-situ GISAXS — •Anna Lena Oechsle1, Julian E. Heger1, Nian Li1, Shanshan Yin1, Sigrid Bernstorff2, and Peter Müller-Buschbaum1,31TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 2ELETTRA Sincrotrone Trieste S. C. p. A., 34149 Basovizza TS, Italy — 3Heinz Maier-Leibnitz Zentrum (MLZ), TU München, 85748 Garching, Germany

The constantly increasing energy demand raises the need for renewable energies and the reduction of energy dissipation. Thermoelectric materials are promising in terms of waste heat recovery and the use of solar thermal energy, as they enable the direct conversion of a temperature gradient into electrical power. Nowadays great research focus is especially on thermoelectric polymers, as they are low or nontoxic, lightweight, flexible and allow a low-cost, large-scale solution-based production of thin films. In this work we show the positive influence of EMIM DCA post-treatment on the Seebeck coefficient and electrical conductivity of PEDOT:PSS thin films. However, for possible future applications it is also important to understand the behavior of these films during long-term operation at elevated temperature. Therefore, we reveal occurring morphology changes with in-situ GISAXS measurements of these films and try to link them to the observed decrease in the electrical conductivity.

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