In Situ Spectroscopic Ellipsometry for Thermochromic CsPbI3 Phase Evolution Portfolio
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https://doi.org/10.1021/acs.jpcc.0c01231 |
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Título
In Situ Spectroscopic Ellipsometry for Thermochromic CsPbI3 Phase Evolution PortfolioAutoría
Fecha de publicación
2020-04-09Editor
American Chemical SocietyISSN
1932-7447Cita bibliográfica
YUAN, Meng, et al. In Situ Spectroscopic Ellipsometry for Thermochromic CsPbI3 Phase Evolution Portfolio. The Journal of Physical Chemistry C, 2020, vol. 124, no 14, p. 8008-8014.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://pubs.acs.org/doi/10.1021/acs.jpcc.0c01231Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Thermochromism is a color change phenomenon for a compound when it undergoes a heating/cooling process. The observation of this phenomenon mostly relies on the naked eye, rather than an exact optical technique, which ... [+]
Thermochromism is a color change phenomenon for a compound when it undergoes a heating/cooling process. The observation of this phenomenon mostly relies on the naked eye, rather than an exact optical technique, which retards better new thermochromic material design and is detrimental to the understanding of its fundamental mechanism. In this paper, we present a facile and noninvasive in situ ellipsometric method to monitor the optical properties evolution of CsPbI3 film in its thermochromic process with three notable phase transitions from room temperature to 340 °C. We monitored the in situ structure evolution of CsPbI3 film by three techniques, namely, temperature-dependent X-ray diffraction, Raman spectroscopy, and spectroscopic ellipsometry. Four phases of CsPbI3, that is, α, β, γ, and δ, could be detected in temperature-dependent spectroscopic ellipsometry measurement. Especially, we found the most expected “stable” α and γ phases show temperature-dependent bandgap evolution even in their phase-stable temperature region. The in situ spectroscopic ellipsometry therefore could function as a facile and noninvasive technique for detection of phase and band evolution with potential applications in smart windows, semiconductor, and optical devices. [-]
Publicado en
J. Phys. Chem. C 2020, 124, 8008−8014Proyecto de investigación
(Nos. 51902127, 61275047, and 21371071), (No. 201915), (MAT2016-76892-C3-1-R), UJI-B2016-05Derechos de acceso
Copyright © 2020 American Chemical Society
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