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Title

Long-Term stabilization of two-dimensional perovskites by encapsulation with hexagonal boron nitride

AuthorsSeitz, Michael; Gant, Patricia; Castellanos-Gómez, Andrés CSIC ORCID ; Prins, Ferry
KeywordsPerovskites
Stability
Exfoliation
Encapsulation
Two-dimensional materials
Ruddlesden-Popper
Issue Date3-Aug-2019
PublisherMultidisciplinary Digital Publishing Institute
CitationNanomaterials 9(8): 1120 (2019)
AbstractMetal halide perovskites are known to suffer from rapid degradation, limiting their direct applicability. Here, the degradation of phenethylammonium lead iodide (PEA<sub>2</sub>PbI<sub>4</sub>) 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.
Publisher version (URL)https://doi.org/10.3390/nano9081120
URIhttp://hdl.handle.net/10261/188957
DOIhttp://dx.doi.org/10.3390/nano9081120
ISSN2079-4991
E-ISSN2079-4991
Appears in Collections:(ICMM) Artículos
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