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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 5: Poster Session I

CPP 5.16: Poster

Dienstag, 28. September 2021, 17:30–19:30, P

Influence of non-halogenated solvents on the morphology and stability of PTQ10:BTP-4F organic solar cells — •Lukas Spanier¹, Renjun Guo¹, Julian Heger¹, Yuqin Zou¹, Matthias Nuber², Matthias Schwartzkopf³, David Toth⁴, Rachid Houssaini⁴, Hristo Iglev², Reinhard Kienberger², Achim Hartschuh⁴, Stephan Roth³, and Peter Müller-Buschbaum¹ — ¹TU München, Lehrstuhl für Funktionelle Materialien, Garching, Germany — ²TU München, Lehrstuhl für Laser- und Röntgenphysik, Garching, Germany — ³Deutsches Elektronen-Synchrotron (DESY), FS-PE, Hamburg, Germany — ⁴Ludwig-Maximilians-Universität München, Department Chemie und CeNS, Munich, Germany

Organic solar cells (OSCs) have recently gained increasing attention due to their rapidly increasing efficiencies as well as the relatively easy scalability in their production. However, their manufacture relies heavily on the use of halogenated solvents, as organic solar cells made with environmentally friendly solvents often suffer from reduced performance. This can be partially reversed by raising the temperature of the solvents during formation of the bulk-heterojunction (BHJ).
We investigate and compare the changes in morphology and performance stability of PTQ10:BTP-4F OSCs processed from various solvents, utilising operando grazing-incidence X-ray scattering during illumination and solar cell operation. We further show the impact of solvent composition on the charge carrier dynamics in the respective BHJs using time-resolved transient absorption spectroscopy.