title: Short-Range Order of Methylammonium and Persistence of Distortion at the Local Scale in MAPbBr3Hybrid Perovskite.
abstract: 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 MAPbBr3hybrid 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.
authors.affiliation: Oak Ridge Natl Lab, Chem & Engn Mat Div, Spallat Neutron Source, Oak Ridge, TN, USA.
authors.forename: Katharine
authors.initials: K
authors.lastname: Page
authors.affiliation: Oak Ridge Natl Lab, Instruments and Source Div, Spallat Neutron Source, Oak Ridge, TN, USA.
authors.forename: Joan E
authors.initials: JE
authors.lastname: Siewenie
authors.affiliation: Department of Chemistry and INSTM, University of Pavia, Pavia, 27100-I, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Quadrelli
authors.affiliation: Department of Chemistry and INSTM, University of Pavia, Pavia, 27100-I, Italy. lorenzo.malavasi@unipv.it.
authors.forename: Lorenzo
authors.identifier: 0000-0003-4724-2376
authors.initials: L
authors.lastname: Malavasi
keywords: hybrid perovskites; methylammonium lead bromide; neutron scattering; pair distribution function; photovoltaics