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Short‐Range Order of Methylammonium and Persistence of Distortion at the Local Scale in MAPbBr 3 Hybrid Perovskite
Author(s) -
Page Katharine,
Siewenie Joan E.,
Quadrelli Paolo,
Malavasi Lorenzo
Publication year - 2016
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201608602
Subject(s) - orthorhombic crystal system , pair distribution function , perovskite (structure) , neutron scattering , distortion (music) , range (aeronautics) , lattice (music) , atmospheric temperature range , condensed matter physics , scattering , phase transition , local structure , materials science , phase (matter) , neutron diffraction , chemical physics , chemistry , crystallography , crystal structure , physics , thermodynamics , optics , quantum mechanics , amplifier , optoelectronics , cmos , composite material , acoustics
Short‐range investigation by means of variable‐temperature neutron total scattering and pair distribution function analysis revealed that the local environment around the methylammonium (MA) cation in MAPbBr 3 hybrid perovskite is maintained through the different phase transitions observed as a function of temperature. In addition, the orthorhombic distortion of the lattice is present at any temperature. Local structure around MA changes from static to configurationally averaged or dynamic with temperature but the local structure of the low‐temperature orthorhombic phase is preserved.