Microscopic (Dis)order and Dynamics of Cations in Mixed FA/MA Lead Halide Perovskites.

ABSTRACT: Recent developments in the field of high efficiency perovskite solar cells are based on stabilization of the perovskite crystal structure of FAPbI₃ while preserving its excellent optoelectronic properties. Compositional engineering of, for example, MA or Br mixed into FAPbI₃ results in the desired effects, but detailed knowledge of local structural features, such as local (dis)order or cation interactions of formamidinium (FA) and methylammonium (MA), is still limited. This knowledge is, however, crucial for their further development. Here, we shed light on the microscopic distribution of MA and FA in mixed perovskites MA_1-x FA _x PbI₃ and MA_0.15FA_0.85PbI_2.55Br_0.45 by combining h

SUBMITTER: Gruninger H 

PROVIDER: S-EPMC7848893 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature