Influence of hidden halogen mobility on local structure of CsSn(Cl_1-x Br _x )₃ mixed-halide perovskites by solid-state NMR.

ABSTRACT: Tin halide perovskites are promising candidates for lead-free photovoltaic and optoelectronic materials, but not all of them have been well characterized. It is essential to determine how the bulk photophysical properties are correlated with their structures at both short and long ranges. Although CsSnCl₃ is normally stable in the cubic perovskite structure only above 379 K, it was prepared as a metastable phase at room temperature. The transition from the cubic to the monoclinic phase, which is the stable form at room temperature, was tracked by solid-state ¹³³Cs NMR spectroscopy and shown to take place through a first-order kinetics process. The complete solid solution CsSn(Cl_1-x Br _x )₃ (0 ≤ x ≤ 1) was successfu

SUBMITTER: Karmakar A 

PROVIDER: S-EPMC8179406 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature