Regensburg 2019 – scientific programme
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DS: Fachverband Dünne Schichten
DS 14: Poster
DS 14.2: Poster
Tuesday, April 2, 2019, 17:00–20:00, Poster E
2D Fluorescence Spectroscopy for Monitoring Photo-induced Degradation in Metal Halide Perovskite — •Alexandros Kiligaridis1, Aboma Merdasa2, Carolin Rehermann2, Mojtaba Abdi-Jalebi3, Jonas Stöber1, Boris Louis1, Marina Gerhard1, Samuel D. Stranks3, Eva L. Unger1,2, and Ivan G. Scheblykin1 — 1Chemical Physics and NanoLund, Lund University, PO Box 118, 22100 Lund, Sweden. — 2Young Investigator Group Hybrid Materials Formation and Scaling, Helmholtz- Zentrum Berlin fur Materialen un Energie GmbH, Albert-Einstein Strasse 16, 12489 Berlin, Germany — 3Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom
One of the vital factors in one day achieving long-lifetime perovskite devices is tackling the obstacle of chemical instability observed in halide perovskites upon illumination and in combination with the presence of oxygen and/or water.
In a recent series of studies we employ a novel 2D fluorescence method to shed light to underlying degradation mechanisms and their correlation to external environmental factors. We use this method to spatially probe thin films as well as micro/nano-sized single perovskite crystals to produce excitation-emission matrices and utilize them as a type of degradation fingerprints. The diffraction limited resolution of the measurements enables the comparison between different morphological surface structures on thin perovskite film and their tendency to photo-degrade in various environments.