DPG Phi
Verhandlungen
Verhandlungen
DPG

SKM 2023 – scientific programme

Parts | Days | Selection | Search | Updates | Downloads | Help

HL: Fachverband Halbleiterphysik

HL 19: Organic Electronics and Photovoltaics I (joint session CPP/HL)

HL 19.5: Talk

Tuesday, March 28, 2023, 10:30–10:45, GÖR 226

In search of novel organic ferroelectrics — •Heiko Mager1, Shyamkumar Haridas2, Max von Delius2, and Martijn Kemerink11Institute for Molecular Systems Engineering and Advanced Materials, Heidelberg University — 2Institute of Organic Chemistry, University of Ulm

The switchable polarization and concomitant pyroelectric and piezoelectric properties of ferroelectric materials enable a variety of applications, ranging from memory devices over thermal and mechanical sensors to energy harvesters. Although current applications are dominated by inorganic materials, organic ferroelectrics offer a flexible, cheap and possibly non-toxic and biodegradable alternative.

Here, we present experimental research on the ferroelectric-like behavior of the novel liquid crystalline molecule C6H6F5O-C3-Amide and its molecular derivatives. To screen for a possible para- to ferroelectric phase transitions, dielectric spectroscopy was employed. While the for ferroelectric materials characteristic Curie-Weiß behavior was not directly observed, features in the dielectric suggest a possible phase transition coinciding with a peak in differential scanning calorimetry traces.
Polarization hysteresis loops were obtained via double wave measurements and characteristic capacitance- voltage "butterfly" loops measured. Comparisons between the different molecular derivatives allow insights into the molecular groups relevant for the switching process.

100% | Mobile Layout | Deutsche Version | Contact/Imprint/Privacy
DPG-Physik > DPG-Verhandlungen > 2023 > SKM