Long-Term Stabilization of Two-Dimensional Perovskites by Encapsulation with Hexagonal Boron Nitride

Nanomaterials
Michael SeitzFerry Prins

Abstract

Metal halide perovskites are known to suffer from rapid degradation, limiting their direct applicability. Here, the degradation of phenethylammonium lead iodide (PEA2PbI4) two-dimensional perovskites under ambient conditions was studied using fluorescence, absorbance, and fluorescence lifetime measurements. It was demonstrated that the long-term stability of two-dimensional perovskites could be achieved through the encapsulation with hexagonal boron nitride. While un-encapsulated perovskite flakes degraded within hours, the encapsulated perovskites were stable for at least three months. In addition, encapsulation considerably improved the stability under laser irradiation. The environmental stability, combined with the improved durability under illumination, is a critical ingredient for thorough spectroscopic studies of the intrinsic optoelectronic properties of this material platform.

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Citations

Apr 29, 2020·Nature Communications·Michael SeitzFerry Prins
Mar 7, 2021·Nanomaterials·Annalisa CoriolanoLuisa De Marco
Aug 14, 2020·Nano Letters·Jonas D ZieglerAlexey Chernikov

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Methods Mentioned

BETA
Fluorescence
x-ray diffraction
transmission microscopy

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