Berlin 2015 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 43: P8: Nanoparticles and Compsite Materials
CPP 43.3: Poster
Wednesday, March 18, 2015, 10:00–13:00, Poster A
Thermoelectric thin films based on a polymer/nanoparticle nanocomposite — •Nitin Saxena1,2, Anton Greppmair3, Mihael Coric4, Jan Wernecke5, Stefanie Marggraf5, Eva M. Herzig4, Martin S. Brandt3, and Peter Müller-Buschbaum1,2 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 2Center for NanoScience, LMU München, 80539 München, Germany — 3TU München, Walter-Schottky-Institut and Physik-Department, 85748 Garching, Germany — 4TU München, Munich School of Engineering, 85748 Garching, Germany — 5Physikalisch-Technische Bundesanstalt, BESSY II Helmholtz-Zentrum Berlin, 12489 Berlin, Germany
Thermoelectric materials transform temperature gradients into voltages which can be used to generate electrical power. Highly efficient thermoelectrics comprise rare and/or toxic inorganic materials and require cost- and energy-intensive fabrication processes. This impedes their large-scale application for power generation.
In order to overcome these limitations, we pursue a hybrid approach combining the semiconducting polymer blend PEDOT:PSS for its high electrical conductivity and inorganic nanoparticles in order to reduce thermal conductivity within the thin film. We investigate the influence of the nanoparticles on the morphology of the blend by means of GISAXS and attempt to correlate this with changes in the thermoelectric behavior. Apart from that, we also investigate the thermal conductivity of both pristine PEDOT:PSS and of the hybrid film, in order to ultimately calculate the figure-of-merit ZT.