Dresden 2020 – scientific programme

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DS: Fachverband Dünne Schichten

DS 20: Focus Session: Organic-based Hybrid Thermoelectrics I

DS 20.4: Talk

Wednesday, March 18, 2020, 10:45–11:00, CHE 89

Orgaic/inorganic hybrid composites for near-room temperature thermoelectric applications — •Rodrigo Rubio-Govea^1,2, Katherine Mazzio^1,2, and Simone Raoux^1,2,3 — ¹Institute for Nanospectroscopy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489, Berlin, Germany — ²Energy Materials In-Situ Laboratory Berlin (EMIL), Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Albert-Einstein-Straße 15, 12489, Berlin, Germany — ³Department of Physics, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489, Berlin, Germany

Hybrid organic/inorganic materials for thermoelectric application have received great attention in the last two decades due to the possibility of enhancing their performance. This is done by combining the intrinsic low thermal conductivity of the organic constituents and the high Seebeck coefficient and electrical conductivity of inorganic materials, making it possible to achieve high power factors and thermoelectric figures of merit. In this work we report the synthesis of hybrid composites consisting of chalcogenide-based nanowires and poly(3,4-ethylenedioxythiophene):polystyrene sulfonate and investigate how to control the thermoelectric properties based on the synthetic conditions. We found that it is possible to change the characteristics of the composite, including changing the majority charge carrier from p-type to n-type by engineering the composition of the inorganic component. We demonstrate an n-type composite with a power factor of 21.47 uWm-1K-2 and a zT value of 0.06 at 200 °C