Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Composites and Functional Polymer Hybrids
CPP 27.1: Vortrag
Mittwoch, 7. September 2022, 11:30–11:45, H39
Polymer - Organic Metal Composites for Waste Heat Recovery — •Marie Siegert1 and Jens Pflaum1,2 — 1Experimental Physics VI, University of Würzburg, 97074 Würzburg — 2ZAE Bayern, 97074 Würzburg
The interest in organic thermoelectrics has greatly gained traction over the last decade due to its great potential in waste heat recovery based on sustainable, low-cost materials. For instance, polymers can be solution processed on industrial scale and display aptly low thermal conductivity, but lack high electrical conductivity due to their inherent disorder. Organic molecular metals, on the other hand, exhibit superior electrical conductivity over a wide temperature range, but the complexity of preparation currently limits scalable applications [1]. Here, we report on an approach utilizing suitable polymers in combination with the p-type organic metal TTT2I3 and the n-type Cu(DCNQI)2, thus exploiting the benefits of both material classes. As demonstrated by our preliminary experimental data, these composite materials do not only allow for a controlled variation of the thermoelectric properties via the respective amount of organic metal additive but also show significant improvements with respect to their mechanical integrity upon thermal treatment. The related thermoelectric properties of the composites will be evaluated with regard to their application in thin film based organic thermolectric generators for waste heat recovery.
The Deutsche Bundesstiftung Umwelt (DBU) is acknowledged for financial support.
[1] F. Huewe, A. Steeger, et al. Adv. Mat. 29 (2017) 1605682