Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 53: Organic Semiconductors: Carrier Dynamics
HL 53.4: Talk
Friday, March 13, 2026, 10:30–10:45, POT/0051
Dual Ferroelectric and Semiconducting behaviour in supramolecular organics — •Tara Vollus1, Sophia Klubertz1, Shyamkumar Vadakket Haridas2, Oleksandr Shysho2, Max von Delius2, and Martijn Kemerink1 — 1IMSEAM, Heidelberg University, Germany — 2Institute of Organic Chemistry, Ulm University, Germany
The combination of interacting conductive and ferroelectric properties, resulting in a multifunctional material, has the potential to simplify the structure of memory devices. It has been demonstrated that the organic ferroelectric material C6H6F5O-C3-amide (M3) exhibits both these properties, showing ferroelectricity and an unexpected DC conductivity.[1][2] It has been shown that the latter is related to the presence of interfacial dipoles that allow efficient charge injection from (oxidation and/or reduction by) metal contacts and is enhanced by a supramolecular arrangement formed at higher temperatures and under an applied electric field. Here, we demonstrate the effects of alignment and, especially, the presence of both n- and p-type doping-like processes, suggesting that M3 is a wide-bandgap organic semiconductor that reversibly can be reduced and oxidized. Kelvin probe force microscopy measurements revealed filament-like potential structures that may act as pathways for bipolar charge transport, and suggest the formation of dynamic pn-junctions.[3]
[1] Mager et al., arXiv:2507.11309 [cond-mat.mtrl-sci] [2] Mager et al., arXiv:2506.02673 [cond-mat.mtrl-sci] [3] Matyba et al., DOI:10.1038/nmat2478
Keywords: supramolecular; dynamic pn-junction; ferroelectric