Disordered Configuration of Methylammonium of CH_3NH_3PbBr_3 Determined by Single Crystal Neutron Diffractometry
Ferroelectrics Volume 348
Page 182-186
published_at 2007-03
Title
Disordered Configuration of Methylammonium of CH_3NH_3PbBr_3 Determined by Single Crystal Neutron Diffractometry
Creators
Kawamura Y.
Creators
Kasano H.
Creators
Asahi T.
Creators
Noda Y.
Creators
Kimura H.
Creator Keywords
perovskite structure
disordered configuration
methylammonium
phase transition
In order to understand the mechanism of the structural phase transition in CH_3NH_3PbBr_3, neutron diffraction data from the single crystal is analyzed by the least-squares method and the maximum entropy method. The disordered configuration of a methylammonium ion in a cage surrounded by eight PbBr_6 octahedrons is identified unambiguously. With comparing the low-temperature structure, the transition is characterized by the condensation of the rotational motion of the PbBr_6 octahedron around the Pb-Br axis, which accompanies the partial ordering of the methylammonium ion to reduce the site symmetry.
Languages
eng
Resource Type
journal article
Publishers
Taylor and Francis
Date Issued
2007-03
File Version
Author’s Original
Access Rights
open access
Relations
[ISSN]0015-0193
[NCID]AA00644949
[isVersionOf]
[URI]http://www.tandf.co.uk/journals/titles/00150193.asp
Schools
大学院理工学研究科（理学）