Dresden 2020 – wissenschaftliches Programm

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AKjDPG: Arbeitskreis junge DPG

AKjDPG 5: PhD Focus Session: In-situ probes toward better understanding of hybrid halide perovskites I (joint session CPP/AKjDPG)

AKjDPG 5.1: Hauptvortrag

Donnerstag, 19. März 2020, 17:15–17:45, ZEU 222

Real-time Investigation of Crystallization Pathways of Organo-Metal-Halide Perovskites Solar — •Michael F Toney — SLAC National Accelerator Laboratory, Menlo Park, Ca, USA

Perovskite solar cells (PSCs) have gained tremendous attention as materials for photovoltaics due to their high efficiencies and their compatibility with low-cost low-temperature fabrication methods (such as solution processing). Perovskite film formation is complex, involving the formation of intermediates and/or metastable phases that strongly affect the final perovskite film microstructure. Therefore, understanding the mechanism of perovskite formation and the crystallization pathways is key for facile control of perovskite formation. We are using time-resolved x-ray scattering to investigate the perovskite formation of MAPbI3-based perovskites and mixed cation (Cs, FA)PbI3 perovskites in-situ during spin coating and the subsequent post-deposition treatments. Our work highlights the importance of real-time investigation of perovskite film formation which can aid in establishing processing-microstructure-functionality relationships and help to provide a fundamental understanding of the mechanisms of perovskite formation.