SKM 2021 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 13: Molecular Electronics, Hybrid and Perovskite Photovoltaics

CPP 13.2: Vortrag

Freitag, 1. Oktober 2021, 10:30–10:45, H3

In situ GIXS study on the crystallization and mesoscale film formation of lead-free MBI perovskite on mesoporous titania during spray deposition from a green solvent — •Julian E. Heger1, Marie Betker2,3, Constantin Harder1,3, Benedikt Sochor3, Christian L. Weindl1, Matthias Schwartzkopf3, Stephan V. Roth2,3, and Peter Müller-Buschbaum1,41Technische Universität München, Physik-Department, Lehrstuhl für Funktionelle Materialien, James-Franck-Straße 1, 85748 Garching, Germany — 2Royal Institute of Technology KTH, Teknikringen 34-35, 100 44 Stockholm, Sweden — 3Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany — 4Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Lichtenbergstr. 1, 85748 Garching, Germany

Hybrid halide perovskites are highly promising materials in photovoltaics, due to high efficiencies and industrial favorable processability. However, most of the studied systems are based on water-soluble lead and toxic solvents, which lower the broad application within European standards of hazardous materials. Bismuth-based alternatives like methylammonium bismuth iodide (MBI) can offer a green route to lead-free perovskite solar cells on a large scale when synthesized in the comparably non-toxic solvent methyl acetate and processed by industrially applicable spray deposition. In this work, we investigate with in situ synchrotron GIXS the crystallization and mesoscale film formation of MBI perovskite on mesoporous titania during spray deposition, to understand MBI formation on a typical solar cell interface.

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