Unveiling the Photo‐ and Thermal‐Stability of Cesium Lead Halide Perovskite Nanocrystals

dc.contributor.author Smith, Emily
dc.contributor.author Petrich, Jacob
dc.contributor.author Boote, Brett
dc.contributor.author Andaraarachchi, Himashi
dc.contributor.author Rosales, Bryan
dc.contributor.author Vela, Javier
dc.contributor.author Blome-Fernández, Rafael
dc.contributor.author Zhu, Feng
dc.contributor.author Reichert, Malinda
dc.contributor.author Santra, Kalyan
dc.contributor.author Li, Jingzhe
dc.contributor.author Petrich, Jacob
dc.contributor.author Vela, Javier
dc.contributor.author Smith, Emily
dc.contributor.department Ames Laboratory
dc.contributor.department Chemistry
dc.date 2020-01-04T09:06:24.000
dc.date.accessioned 2020-06-30T01:16:57Z
dc.date.available 2020-06-30T01:16:57Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 2019
dc.date.embargo 2020-08-22
dc.date.issued 2019-08-22
dc.description.abstract <p>Lead halide perovskites possess unique characteristics well‐suited for optoelectronic and energy capture devices, however, concerns about their long‐term stability remain. All‐inorganic CsPbX3 (X = Cl, Br, I) perovskite nanocrystals have been reported with improved stability. We investigate the photo‐ and thermal‐stability properties of CsPbX3 (X = Cl, Br, I) nanocrystals by electron microscopy, x‐ray diffraction, thermogravimetric analysis, ensemble and single particle spectral characterization. CsPbBr¬3 is stable under 1‐sun illumination for 16 h in ambient conditions, although single crystal analysis indicates the luminescence states change over time. CsPbBr¬3 is also stable to heating to 250 °C. Large CsPbI3 crystals (34 ± 5 nm) are the least stable under the same conditions; and with heating, the γ (black) phase reverts to the non‐luminescent δ phase. Smaller CsPbI3 nanocrystals (14 ± 2 nm) purified by a different washing strategy exhibit improved photostability with no evidence of crystal growth but are still thermally unstable. Both CsPbCl3 and CsPbBr3 show crystal growth under irradiation or heat, likely with a preferential orientation. TGA‐FTIR reveals nanocrystal mass loss was only from liberation and subsequent degradation of surface ligands. Encapsulation or other protective strategies should be employed for long‐term stability under conditions of high irradiance or temperature.</p>
dc.description.comments <p>This is the peer-reviewed version of the following article: Boote, Brett W., Himashi P. Andaraarachchi, Bryan A. Rosales, Rafael Blome-Fernández, Feng Zhu, Malinda D. Reichert, Kalyan Santra, Jingzhe Li, Jacob W. Petrich, Javier Vela, and Emily A. Smith. "Unveiling the Photo‐and Thermal‐Stability of Cesium Lead Halide Perovskite Nanocrystals." <em>ChemPhysChem</em>. (2019), which has been published in final form at https://doi.org/<a href="http://dx.doi.org/10.1002/cphc.201900432" target="_blank">10.1002/cphc.201900432</a>. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/chem_pubs/1141/
dc.identifier.articleid 2144
dc.identifier.contextkey 15222409
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath chem_pubs/1141
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/14447
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/chem_pubs/1141/2019_VelaJavier_UnveilingPhoto.pdf|||Fri Jan 14 18:49:46 UTC 2022
dc.source.uri 10.1002/cphc.201900432
dc.subject.disciplines Materials Chemistry
dc.subject.disciplines Nanoscience and Nanotechnology
dc.subject.disciplines Physical Chemistry
dc.subject.keywords Lead halide perovskites
dc.subject.keywords photostability
dc.subject.keywords degradation
dc.subject.keywords semiconductor nanocrystals
dc.subject.keywords single crystal luminescence
dc.title Unveiling the Photo‐ and Thermal‐Stability of Cesium Lead Halide Perovskite Nanocrystals
dc.type article
dc.type.genre article
dspace.entity.type Publication
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