Twinning in MAPbI₃ at room temperature uncovered through Laue neutron diffraction.

ABSTRACT: The crystal structure of MAPbI₃, the signature compound of the hybrid halide perovskites, at room temperature has been a reason for debate and confusion in the past. Part of this confusion may be due to twinning as the material bears a phase transition just above room temperature, which follows a direct group-subgroup relationship and is prone to twinning. Using neutron Laue diffraction, we illustrate the nature of twinning in the room temperature structure of MAPbI₃ and explain its origins from a group-theoretical point-of-view.

SUBMITTER: Breternitz J 

PROVIDER: S-EPMC7538425 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature