Regensburg 2025 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 15: Poster Session I

CPP 15.1: Poster

Monday, March 17, 2025, 19:00–21:00, P4

Exploring Green Solvent Additives for Enhanced Solubility in Organic Photovoltaics Processing — •Leonhard Schatt, Fabian Eller, and Eva M. Herzig — Dynamik und Strukturbildung - Herzig Group, Universität Bayreuth, Universitätsstr. 30, 95447 Bayreuth, Germany

Organic Photovoltaic (OPV) devices offer the potential for low-cost production of devices that convert light into electricity. These devices are typically processed from solution, which allows for simple, scalable production methods such as printing. However, the solvents used by most research groups are halogenated aromatic solvents, as green solvents often lack good solubility for the solutes used. We are therefore experimenting with additives in green solvents as a method of tuning solubility. We monitor the solubility with in-situ solubility measurements to study the effects of additive type and volume fraction. This will allow us to map the solubility space of the high performance OPV material PM6. Our aim is to contribute to the replacement of halogenated solvents for OPV processing and to make our organic electronic material processing feasible for industrial applications.

Keywords: solubility; green solvents; Organic Photovoltaics (OPV); Halogen-Free Processing