Static and Dynamic Disorder in Formamidinium Lead Bromide Single Crystals
We show that formamidinium-based crystals are distinct from methylammonium-based halide perovskite crystals because their inorganic sublattice exhibits intrinsic local static disorder that coexists with a well-defined average crystal structure. Our study combines terahertz-range Raman scattering wit...
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| Veröffentlicht in: | The journal of physical chemistry letters 2023-02, Vol.14 (5), p.1288-1293 |
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| container_title | The journal of physical chemistry letters |
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| creator | Reuveni, Guy Diskin-Posner, Yael Gehrmann, Christian Godse, Shravan Gkikas, Giannis G. Buchine, Isaac Aharon, Sigalit Korobko, Roman Stoumpos, Constantinos C. Egger, David A. Yaffe, Omer |
| description | We show that formamidinium-based crystals are distinct from methylammonium-based halide perovskite crystals because their inorganic sublattice exhibits intrinsic local static disorder that coexists with a well-defined average crystal structure. Our study combines terahertz-range Raman scattering with single-crystal X-ray diffraction and first-principles calculations to probe the evolution of inorganic sublattice dynamics 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 structural dynamics and phase transitions at higher temperatures. |
| doi_str_mv | 10.1021/acs.jpclett.2c03337 |
| format | Article |
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Phys. Chem. Lett</addtitle><description>We show that formamidinium-based crystals are distinct from methylammonium-based halide perovskite crystals because their inorganic sublattice exhibits intrinsic local static disorder that coexists with a well-defined average crystal structure. Our study combines terahertz-range Raman scattering with single-crystal X-ray diffraction and first-principles calculations to probe the evolution of inorganic sublattice dynamics with temperature in the range of 10–300 K. 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| subjects | Letter Physical Insights into Materials and Molecular Properties |
| title | Static and Dynamic Disorder in Formamidinium Lead Bromide Single Crystals |
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