Dresden 2026 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 53: Organic Semiconductors: Carrier Dynamics
HL 53.5: Talk
Friday, March 13, 2026, 10:45–11:00, POT/0051
Backbone Alignment and Morphology Formation in PBTTT Thin Films: Insights from In-Situ GIWAXS — •Robin M. Teichgreber1, Christopher R. McNeill2, and Eva M. Herzig1 — 1Dynamics and Structure Formation - Herzig Group, University of Bayreuth, Universitätsstraße 30, 95447 Bayreuth, Germany — 2Material Science and Engineering, Monash University, 20 Research Way, Clayton
The performance of organic electronic devices strongly depends on the morphology of the organic semiconductor thin film [1]. Enhancing the understanding on fundamental structure-function relationships is therefore crucial to improve the performance of such devices in the future. Highly aligned films can furthermore be used to study fundamental charge separation processes. Controlling the alignment of polymer backbones is a challenge in the first place, demanding further research on the processes of structure formation resulting in aligned films. Using PBTTT as a model system, the influence of different coating parameters on the kinetics of film formation during the deposition thin films via blade-coating is investigated by employing time-resolved in-situ GIWAXS measurements. Furthermore, the formation of high degrees of alignment during the post-deposition annealing process was studied with temperature-resolved GIWAXS. [1] Herrmann, N.J., von Coelln, N., Teichgreber, R.M., Höfener, S., Huck, C., Ghalami, F. et al. (2023) J. Mater. Chem. C, 11, 10185-10197.
Keywords: GIWAXS; Backbone Alignment; In-Situ; Structure Formation; Organic Semiconductors