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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Weller, Mark T.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (39/39 displayed)
- 2023Anomalous Electron–Phonon Coupling in Cesium-Substituted Methylammonium Lead Iodide Perovskites
- 2023Photoelectrochemical performance of strontium titanium oxynitride photo-activated with cobalt phosphate nanoparticles for oxidation of alkaline watercitations
- 2023Using pressure to unravel the structure–dynamic-disorder relationship in metal halide perovskitescitations
- 2023Using pressure to unravel the structure-dynamic-disorder relationship in metal halide perovskitescitations
- 2021Photoluminescence of bound-exciton complexes and assignment to shallowdefects in methylammonium/formamidinium lead iodide mixed crystals
- 2020Phase behavior and substitution limit of mixed cesium-formamidinium lead triiodide perovskitescitations
- 2019Spectroscopic ellipsometry study of FAxMA1−xPbI3 hybrid perovskite single crystals
- 2018Pressure-Induced Locking of Methylammonium Cations versus Amorphization in Hybrid Lead Iodide Perovskitescitations
- 2018Pressure-Induced Locking of Methylammonium Cations versus Amorphization in Hybrid Lead Iodide Perovskites
- 2017Determination of the Hydrogen Positions in the Novel Barium Boroarsenate Ba[B2As2O8(OH)2] by Combined Single Crystal X-ray and Powder Neutron Investigationscitations
- 2016Efficient bi-functional electrocatalysts of strontium iron oxy-halides for oxygen evolution and reduction reactions in alkaline mediacitations
- 2015Reversible Hydration of CH3NH3Pbl3 in Films, Single Crystals, and Solar Cellscitations
- 2015Reversible hydration of CH3NH3PbI3 in films, single crystals, and solar cellscitations
- 2015The cubic perovskite structure of black formamidinium lead iodide, α-[HC(NH2)2]PbI3, at 298 Kcitations
- 2014Determining hydrogen positions in crystal engineered organic molecular complexes by joint neutron powder and single crystal X-ray diffractioncitations
- 2014Synthesis and structural characterisation of iron(II) and copper(II) diphosphates containing flattened metal oxotetrahedracitations
- 2014Direct observation of structural changes near and at the charge-ordering temperature of ilvaite using high-flux neutron powder diffraction
- 2014Neutron powder diffractioncitations
- 2013Iron fluorophosphatescitations
- 2013Manganese (III) fluorophosphate frameworkscitations
- 2012Probing hydrogen positions in hydrous compounds:information from parametric neutron powder diffraction studiescitations
- 2012Copper(II) fluorophosphatescitations
- 2012Probing hydrogen positions in hydrous compoundscitations
- 2012Cobalt (II) fluorophosphate frameworkscitations
- 2011Fluoride-rich, hydrofluorothermal routes to functional transition metal (Mn, Fe, Co, Cu) fluorophosphatescitations
- 2010Structural isotope effects in metal hydrides and deuteridescitations
- 2010The kinetics of bulk hydration of the disaccharides α-lactose and trehalose by in situ neutron powder diffractioncitations
- 2010Combined single-crystal X-ray and neutron powder diffraction structure analysis exemplified through full structure determinations of framework and layer beryllate mineralscitations
- 2009Synthesis and crystal structures of iron hydrogen phosphatescitations
- 2009Crystallography of hydrogen-containing compoundscitations
- 2009Crystallography of hydrogen-containing compounds: realizing the potential of neutron powder diffractioncitations
- 2009In situ neutron powder diffraction and structure determination in controlled humiditiescitations
- 2004Investigation of cancrinite structures by powder neutron diffractioncitations
- 2003The effect of calcium on phase formation in the sodium aluminium silicate carbonate system and the structure of NaCaSiO3OHcitations
- 2002Variable temperature powder neutron diffraction study of SmNiO3 through its M-I transition using a combination of samarium and nickel isotopic substitutioncitations
- 2002Crystal structures and magnetic properties of the manganese oxide chlorides Sr2MnO3Cl and Sr4Mn3O8-yCl2citations
- 2001New directions in synthetic and structural solid state chemistrycitations
- 2001Structural and Mössbauer study of Sr2FeO3X (X = F, Cl, Br) and the magnetic structure of Sr2FeO3Fcitations
- 2000Neutron and x-ray powder diffraction studies of the oxynitrides SrW(O,N)3, Ba3W2(O,N)8 and Ba3Mo2(O,N)8citations
Places of action
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article
Pressure-Induced Locking of Methylammonium Cations versus Amorphization in Hybrid Lead Iodide Perovskites
Abstract
The structural phase behavior of high-quality single crystals of methylammonium lead iodide (CH3NH3PbI3 or MAPbI3) was revisited by combining Raman scattering and photoluminescence (PL) measurements under high hydrostatic pressure up to ca. 10 GPa. The single crystals were specially grown with the final thickness needed for pressure experiments, retaining their high quality due to a less invasive preparation procedure, which avoids sample thinning. Both PL and Raman spectra show simultaneous changes in their profiles that indicate the occurrence of three phase transitions subsequently at around 0.4, 2.7, and 3.3 GPa. At the second phase transition, the Raman spectra exhibit a pronounced reduction in the line width of the phonon modes of the inorganic cage, similar to the changes observed at the tetragonal-to-orthorhombic phase transition occurring at around 160 K but ambient pressure. This behavior is interpreted as evidence for the locking of the organic cations in the cage voids above 2.7 GPa due to the reduced volume and symmetry of the unit cell. At the third phase transition, reported here for the first time, the PL is greatly affected, whereas the Raman spectrum experiences only subtle changes related to a splitting of some of the peaks. This behavior may indicate a change mostly in the electronic structure with little effect on the crystal structure. Strikingly, the sharp Raman features observed at high pressures do not support amorphization of MAPbI3 with onset at 3 GPa, as claimed by most of the high-pressure (X-ray) literature. We interpret this apparent discrepancy in terms of the degree of disorder introduced at different length scales in the perovskite lattice by the pressure-induced freeze-out of the methylammonium cation motion.