Dresden 2026 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 22: Hybrid, Organic and Perovskite Optoelectronics and Photovoltaics I

CPP 22.1: Hauptvortrag

Dienstag, 10. März 2026, 09:30–10:00, ZEU/0260

From Solution to Thin Films: Structure Formation Pathways in Organic Photovoltaic Films — •Eva M. Herzig — Dynamik- und Strukturbildung - Herzig Group, University of Bayreuth, Germany

The performance of organic solar cells is governed by a delicate interplay between molecular packing, phase separation, and mesoscale connectivity in donor-acceptor blends. It is therefore highly desirable to control structure formation; however, this remains a non-trivial task. Several factors contribute simultaneously: the initial aggregation state in solution [1,2], the rapid structure formation during solution processing [2], and subsequent temperature- or solvent-annealing steps [3,4]. In this talk, I will discuss and illustrate with selected examples at which of these stages the final thin-film morphology can be controlled.

Using time-resolved and multimodal characterization methods, including grazing-incidence X-ray scattering and optical spectroscopy, we resolve the evolving structures during and after film deposition. These measurements reveal how subtle variations in processing conditions translate into distinct nanoscale morphologies.

[1] F. Eller & E. M. Herzig, J. Phys. Chem. A 2024, DOI: 10.1021/acs.jpca.4c04902

[2] F. Eller, R. Hildner, R. W. A. Havenith & E. M. Herzig, Small 2023, DOI: 10.1002/smll.202207537

[3] F. Eller, C. R. McNeill & E. M. Herzig, Adv. Energy Mater. 2024, DOI: 10.1002/aenm.202304455

[4] M. Kuhn, X. Huang, M. Gebert, L. Thomsen, C. R. McNeill & E. M. Herzig, Adv. Funct. Mater. 2025, DOI: 10.1002/adfm.202509532

Keywords: structure formation; thin films; organic electronics; in-situ investigation; automated processing