Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 48: Electrical, Dielectrical and Optical Properties of Thin Films (joint session CPP/KFM)
CPP 48.2: Vortrag
Freitag, 9. September 2022, 11:45–12:00, H38
In-situ investigations of morphology degradation and oxidation level changes in EMIM DCA post-treated PEDOT:PSS thin films upon external influence — •Anna Lena Oechsle1, Julian E. Heger1, Nian Li1, Shanshan Yin1, Sigrid Bernstorff2, and Peter Müller-Buschbaum1,3 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — 2ELETTRA, 34149 Basovizza TS, Italy — 3MLZ, TU München, 85748 Garching
Nowadays thermoelectric generators are considered a promising technique for heat waste recovery as they enable a direct conversion of a temperature gradient into electrical power. Especially, organic thermoelectric polymers are attractive, owning some advantages like low cost, lightness and high mechanical flexibility, low or no toxicity, as well as a usually low thermal conductivity. In our work we show the positive effect of ionic liquid (IL) treatment on the thermoelectric properties, Seebeck coefficient and electrical conductivity, of semi-conducting PEDOT:PSS thin films. Furthermore with different in-situ experiments like GISAXS (grazing incidence small angle x-ray scattering), UV-Vis, and conductivity measurements we examine the inner film morphology and oxidation level changes upon operation at different ambient conditions.