SKM 2021 – wissenschaftliches Programm

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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-Buschbaum11TU 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.

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