Atmospheric Exposure Triggers Light-Induced Degradation in 2D Lead-Halide Perovskites.

ABSTRACT: Quasi-2D perovskites have been pivotal in recent efforts to stabilize perovskite solar cells. Despite the stability boost provided when these materials are introduced in perovskite solar cells, little is known about the intrinsic light and environmental stability of quasi-2D perovskites. In this study, we characterize the photostability of exfoliated quasi-2D perovskite single crystals in air using photoluminescence, infrared, X-ray fluorescence, and energy-dispersive X-ray spectroscopy. Photoexcitation leads to severe material loss with oxygen as a prerequisite for material breakdown. The effect can be traced to the formation of reactive oxygen species, as demonstrated by increases in the photostability under oxygen-free conditions. We show the effect of combined passivation steps, showca

SUBMITTER: Grimaldi G 

PROVIDER: S-EPMC11650760 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature