Regensburg 2025 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 11: Hybrid and Perovskite Photovoltaics II
CPP 11.3: Vortrag
Montag, 17. März 2025, 16:45–17:00, H38
Utilizing CsPbBr3 Nanocrystals as Nucleation Seeds for Scalable FAPbI3 Thin Films — •Altantulga Buyan-Arivjikh1, Jascha Fricker1, Thomas Baier1, Xiaojing Ci1, Lixing Li1, Matthias Schwartzkopf2, Sarathlal Koyiloth Vayalil2, and Peter Müller-Buschbaum1 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2DESY, 22604 Hamburg, 22607, Germany
Lead-halide perovskites have gained a significant 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, where the crystallinity and morphology of the thin film are critical factors influencing the properties and performance of perovskites. In this work, we present a novel approach for improving the quality of FAPbI3 thin films by utilizing CsPbBr3 nanocrystals as nucleation seeds. In-situ optical spectroscopy experiments reveal a faster transition of FAPbI3 into the photactive phase in the seeded thin films as well as a reduced defect density. In-situ grazing incidence wide angle X-ray scattering (GIWAXS) measurements confirm the former and additionally show that the seed crystals improve the thin film texture by inducing a preferred crystallite orientation.
Keywords: perovskite; scalable production; photovoltaics; crystallization kinetics; seeding