Regensburg 2019 – scientific programme
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BP: Fachverband Biologische Physik
BP 10: Crystallization, nucleation and self-assembly (joint session CPP/BP)
BP 10.4: Talk
Tuesday, April 2, 2019, 10:15–10:30, H14
Using x-ray scattering to understand the formation of unexpected structures in organic thin films — Jenny Lebert1, Eva M. Kratzer1,2, Axel Bourdick3, Mihael Coric1, Stephan Gekle3, and •Eva M. Herzig1,2 — 1Herzig Group, MSE Technische Universität München, Lichtenbergstr. 2a, 85748 Garching, Germany — 2Dynamik und Strukturbildung - Herzig Group, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany — 3Biofluid Simulation and Modeling, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany
The morphology plays an important role for the performance of organic, semi-conducting thin films. Understanding the self-assembly processes that occur during the drying of the photoactive films, will allow us to make progress in controlled nanomorphology tuning. We have therefore developed tools to investigate thin film formation processes using synchrotron radiation to resolve structure and structural developments [1,2]. We have now investigated an in-situ polymerization method for polythiophene to examine how much we can influence the morphology during film formation with such an approach. GIWAXS measurements, molecular dynamics simulations, and spectroscopic analysis suggest the presence of polythiophene in a novel and stable crystal structure with an enhanced intermolecular interaction [3]. [1] S. Pröller et al. Rev. Sci. Instrum. 2017, 88(6): 066101. [2] S. Pröller et al. Adv. Energy Mater. 2016, 6(1): 1501580. [3] J. Lebert et al. ACS Omega 2018, 6: 6388-6394.