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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 49: Poster Session II

CPP 49.41: Poster

Dienstag, 17. März 2020, 14:00–16:00, P1A

Influence of solvent on the morphology and optical properties of printed active layers based on PBDB-T-SF:IT-4F for application in organic solar cells — •Daniel Maximilian Steger, Kerstin Sabrina Wienhold, and Peter Müller-Buschbaum — Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Str. 1, 85748 Garching, Germany

The morphology of the active layer of polymer-based organic solar cells (OSCs) greatly influences their efficiency. Therefore factors determining the structure such as the used solvents are highly relevant in current research. The active layer consist of a blend of the polymer donor material PBDB-T-SF and the non-fullerene small molecule acceptor material IT4F. In this work the active layer is, in contrast to most other studies, produced via thin film printing, as this technique is a very promising approach to increase the scalability of solar cell production. The influence of the solvent on the morphology is investigated by observing the optical properties via UV/VIS- and fluorescence spectroscopy, the surface structure via atomic force microscopy (AFM) and studying the inner morphology by using scattering methods such as grazing incidence wide angle x-ray scattering (GIWAXS) and grazing incidence small angle x-ray scattering (GISAXS).