Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 18: Organic Electronics and Photovoltaics I
CPP 18.12: Vortrag
Dienstag, 19. März 2024, 12:45–13:00, H 0110
Systematic search for novel organic ferroelectric materials — •Maximilian Litterst1, Manjunath Balagopalan2, Ramon Jannasch1, Elin Dypvik Sødahl2, Ola Nilsen2, Carl Henrik Gørbitz2, Kristian Berland2 und Martijn Kemerink1 — 1IMSEAM, Heidelberg University — 2Department of Chemistry, Norwegian University of Life Science, Oslo
Piezo- and ferroelectric materials are forming a multi-billion-dollar market due to their wide applications as actuators, ultrasound generators, mechanical sensors and small-scale energy generators. The market is currently dominated by inorganic materials, which show excellent performance but their application, especially in biological environments, is limited by drawbacks like toxicity, rigidity and acoustic impedance mismatch. Organic ferroelectrics could overcome these limitations. However, the currently most used material PVDF has other limitations including a high coercive field.
Building on previous theoretical work to systematically identify new candidates for ferroelectric materials[1], we employed a combination of experimental techniques to search for signatures of ferroelectricity in these materials. Specifically, we used dielectric relaxation spectroscopy, double wave measurements and CV- measurements. Here, we present an overview over the results of this approach, where several of the investigated materials show clear indications of ferroelectric behavior, highlighting the validity of the approach. At the same time, other materials show intriguing, but so far inconclusive behavior.
[1] arXiv:2306.07138 [cond-mat.mtrl-sci]
Keywords: Ferroelectricity; Organic ferroelectrics; Computational screening