Static and Dynamic Disorder in Formamidinium Lead Bromide Single Crystals

Autor:	Guy Reuveni, Yael Diskin-Posner, Christian Gehrmann, Shravan Godse, Giannis G. Gkikas, Isaac Buchine, Sigalit Aharon, Roman Korobko, Constantinos C. Stoumpos, David A. Egger, Omer Yaffe
Rok vydání:	2023
Předmět:	Condensed Matter - Materials Science Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences General Materials Science Physical and Theoretical Chemistry
Zdroj:	The Journal of Physical Chemistry Letters. 14:1288-1293
ISSN:	1948-7185
Popis:	We show that formamidinium lead bromide is unique among the halide perovskite crystals because its inorganic sub-lattice exhibits intrinsic local static disorder that co-exists with a well-defined average crystal structure. Our study combines THz-range Raman-scattering with single-crystal X-ray diffraction and first-principles calculations to probe the inorganic sub-lattice dynamics evolution with temperature in the range of 10-300 K. The temperature evolution of the Raman spectra shows that low-temperature, local static disorder strongly affects the crystal's structural dynamics and phase transitions at higher temperatures. Total 16 pages, 8 figures (including SI). Submitted to The Journal of Physical Chemistry Letters
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bee6a0b421949d19cab26211fb8272a https://doi.org/10.1021/acs.jpclett.2c03337 Zobrazit plný text záznamu