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Siegert, Tobias ; Greve, Christopher ; Moos, Ralf ; Herzig, Eva M. ; Panzer, Fabian ; Köhler, Anna ; Grüninger, Helen:
Influence of Particle Size on Halide Mixing Between MAPbI3 and MAPbBr3.
2023
Veranstaltung: 12th SolTech Conference 2023
, 03.-05.10.2023
, Würzburg, Germany.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung
,
Poster
)
Abstract
Mixed halide perovskites, such as MAPbI3-xBrx, have emerged as a promising contender for tandem solar cell applications mostly due to their tunability of bandgap energy. However, pronounced halide migration, resulting in a performance deterioration, is still an unresolved problem. To address the halide kinetics, we study the temperature dependent halide mixing between MAPbI3 and MAPbBr3 as a function of the perovskite powder morphology. Here, the surface to bulk ratio of the powder particles is varied by systematically changing particle sizes.