Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 49: Organic Electronics and Photovoltaics IV
CPP 49.5: Vortrag
Freitag, 22. März 2024, 10:30–10:45, H 0107
Unveiling the Thermal Expansion Behaviour of Organic Semiconductor Thin Films — •Meike Kuhn1,2, Christopher R. McNeill2, and Eva M. Herzig1 — 1Dynamik und Strukturbildung - Herzig Group, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany — 2Material Science and Engineering, Monash University, 20 Research Way, Clayton, Australia
Semiconducting polymers have emerged as a promising material for next-generation solar cells. However, for the optimization and reliability of such devices, understanding the thermal behaviour of the organic semiconductor layer is crucial. The thermal expansion impacts the molecular packing and crystallinity of polymers, influencing the charge transport properties of a material. Mismatches in the thermal expansion coefficients between the active layer and the other solar cell layers can furthermore lead to mechanical stress and device failure. In this study, we use temperature-dependent in-situ GIWAXS and NEXAFS spectroscopy to systematically investigate the thermal behaviour of the widely used semiconducting polymer PDBD-T-2F (PM6). Specifically, we investigate the influence of the temperature on the molecular packing, crystallinity and orientation. Additionally, we study the thermal behaviour of PM6:Y6 blends, which are widely used for high-efficiency organic solar cells, to examine the impact of temperature on OSC active layers.
Keywords: Semiconducting Polymers; GIWAXS; NEAXFS; Thermal Expansion