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Leupold, Nico ; Ramming, Philipp ; Bauer, Irene ; Witt, Christina ; Jungklaus, Jennifer ; Moos, Ralf ; Grüninger, Helen ; Panzer, Fabian:
How Methylammonium Iodide Reactant Size Affects Morphology and Defect Properties of Mechanochemically Synthesized MAPbI₃ Powder.
In: European Journal of Inorganic Chemistry.
Bd. 26
(2023)
Heft 8
.
- e202200736.
ISSN 1099-0682
DOI: https://doi.org/10.1002/ejic.202200736
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Offizieller Projekttitel Projekt-ID Stabile Perowskitsolarzellen durch kontrollierte Kristallisationsprozesse und durch grundlegendes Verständnis der optischen und elektrischen Eigenschaften sowie der Defektchemie MO 1060/32-1 Ohne Angabe GR 5505/1-1 Ohne Angabe PA 3373/3-1 Ohne Angabe 506642499 |
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Deutsche Forschungsgemeinschaft |
Abstract
Here, we investigate in detail the impact of the size of the methylammonium iodide (MAI) reactants in the mechanochemical powder synthesis of the halide perovskite methylammonium lead iodide (MAPbI3). Morphology and structural characterizations by scanning electron microscopy and X-ray diffraction reveal that with increasing MAI reactant size, the particle size of the perovskite powder increases, while its defect density decreases, as suggested by nuclear quadrupole resonance spectroscopy and photoluminescence investigations. The reason for this behavior seems to be associated to the sensitive influence of the MAI size on the time durations of MAPbI3 synthesis and delayed MAPbI3 crushing stage during ball milling. Thus, our results emphasize the high importance the reactant properties have on the mechanochemical synthesis of halide perovskites and will contribute to enhance the reproducibility and control of the fabrication of halide perovskites in powder form.