Storage-Induced Powder Evolution and Ionic Transport in Room-Temperature Aerosol-Deposited MAPbBr₃ Thick Films

Titelangaben

Xu, Tianshan ; Scholz, Till ; Griesbach, Markus ; Köhler, Anna ; Moos, Ralf:
Storage-Induced Powder Evolution and Ionic Transport in Room-Temperature Aerosol-Deposited MAPbBr₃ Thick Films.
2026
Veranstaltung: 9th International Conference on Perovskite Solar Cells and Optoelectronics - PSCO 2026 , 23.9.-25.9.2026 , Lausanne, Switzerland.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Poster )

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Abstract

Hybrid organic–inorganic lead halide perovskites are soft ionic solids whose structure, surface chemistry, and ion transport are highly sensitive to the surrounding environment. While perovskite powders are commonly treated as stable post-synthetic precursors, their high surface-to-volume ratio and defect-rich interfaces may allow continued microstructural evolution during storage, even at room temperature. We first examine the morphological evolution of MAPbBr₃ and MAPbI₃ powders stored under different storage environments and temperatures. The results show that perovskite powders should not be regarded as structurally static materials after synthesis, but rather as dynamic ionic solids whose microstructure and surface chemistry continue to evolve. This finding underscores the importance of accounting for the environmental history of perovskite powders, as changes in their morphology and particle-size distribution may strongly influence subsequent powder-based deposition.