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Siegert, Tobias ; Haddadi Barzoki, Fatemeh ; Griesbach, Marco ; Greve, Christopher ; Moos, Ralf ; Herzig, Eva M. ; Köhler, Anna ; Grüninger, Helen:
Influence of Particle Size on the Formation of Solid Solutions Between MAPbI 3 and MAPbBr3.
2024
Veranstaltung: DPG-Frühjahrstagung
, 17.03.-22.03.2024
, Berlin.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Poster
)
Abstract
Mixed halide perovskites, e.g., MAPbI3-xBrx, have emerged as promising candidates to be used as wide-bandgap absorbing layers in tandem solar cell applications due to their tunability of bandgap energy. However, pronounced halide migration, which leads to a severe drop in performance, is still hindering a commercialization. To analyze the halide kinetics, we investigate the thermally driven formation of a solid solution, i.e., halide mixing, between MAPbI3 and MAPbBr3 as a function of the morphology of the perovskite powder. Here, the surface to bulk ratio of the parent powder particles is varied by systematically changing particle sizes.