Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 2: Electrical, Dielectrical and Optical Properties of Thin Films I

CPP 2.4: Vortrag

Montag, 12. März 2018, 10:15–10:30, C 230

Investigation of the n-type polymer P(NDI2OD-T2) for thermoelectric applications — •Regina Michaela Kluge, Nitin Saxena, and Peter Müller-Buschbaum — TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching

Thermoelectric generators pose a promising approach in renewable energies as they are able to convert waste heat into electricity. In order to build high efficiency devices, suitable thermoelectric materials are needed. Among them, conjugated polymers possess the encouraging ability of easy and various types of scalable solvent processes like roll-to-roll printing. Although they are still less efficient than their inorganic counterparts, their easy synthesis, flexibility and eco-friendliness make them a valuable alternative. However, in order to build a thermoelectric device, both n- and p-type materials are needed. Whereas p-type polymers are frequently studied, n-type polymers have often been neglected in the past which may originate from their sensitivity towards oxygen and moisture. We investigate the air-stable, high-mobility n-type polymer P(NDI2OD-T2) in terms of its optical properties such as its absorbance. Moreover, thermoelectric properties such as the Seebeck coefficient and the electrical conductivity are probed, which allows to determine the power factors of these films.