Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 31: Organic Electronics and Photovoltaics III: Mobile and Trapped Charges
HL 31.8: Vortrag
Dienstag, 21. März 2017, 11:30–11:45, ZEU 260
Thermoelectric thin films based on a polymer/nanoparticle nanocomposite — •Nitin Saxena1,2, Mihael Coric3, Anton Greppmair4, Jan Wernecke5, Mika Pflüger5, Michael Krumrey5, Martin S. Brandt4, Eva M. Herzig3, 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, Munich School of Engineering, 85748 Garching, Germany — 4TU München, Walter-Schottky-Institut and Physik-Department, 85748 Garching, Germany — 5PTB, BESSY II Helmholtz-Zentrum Berlin, 12489 Berlin, Germany
Thermoelectric materials pose a compelling technology for power generation from renewable energies, since temperature gradients are transformed into voltages and thus electrical power. So far, highly efficient thermoelectrics comprise rare and/or toxic inorganic materials, and require cost- and energy-intensive fabrication. These points hinder their large-scale application. 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. Beside the thermoelectric properties, we investigate the thermal conductivity of pristine PEDOT:PSS and of the hybrid film, in order to ultimately calculate the figure-of-merit ZT. Tender resonant x-ray scattering (T-ReXS) is used to derive a morphological model, and describe the influence of the nanoparticles on the thermoelectric properties.