Berlin 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 3: Crystallization, Nucleation and Self-Assembly I
CPP 3.8: Talk
Monday, March 18, 2024, 11:45–12:00, H 0110
Effect of Perovskite Nanocrystal Nucleation Seeds on Microstructure and Crystallization Pathways in Organic-Inorganic Halide Perovskite Thin Films — •Altantulga Buyan-Arivjikh1, Matthias Schwartzkopf2, Sarathlal Koyiloth Vayalil2, Stephan V. Roth2, Guangjiu Pan1, Jinsheng Zhang1, Zhuijun Xu1, Thomas Baier1, Yanan Li1, and Peter Müller-Buschbaum1,3 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2DESY, 22604 Hamburg, 22607, Germany — 3MLZ, TUM, 85748 Garching, Germany
Organic-inorganic halide perovskites have gained a huge interest in the scientific community owing to their favorable optoelectronic properties combined with their ease of production and abundance of raw materials. In many cases, polycrystalline thin films are fabricated for which thin film crystallinity and morphology are key factors affecting the perovskite properties. In this work, we present a novel approach for improving the thin film quality by employing external perovskite nanocrystals as seeds in slot-die coated formamidinium lead iodide thin films. Grazing incidence wide angle X-ray scattering (GIWAXS) measurements show that the seed crystals improve the thin film texture by inducing a preferred crystallite orientation. Furthermore, we reveal a new crystallization pathway in seeded thin films with respect to unseeded ones via in-situ GIWAXS measurements.
Keywords: perovskite; scalable production; photovoltaics; crystallization kinetics; seeding