Alloying a single and a double perovskite: a Cu^+/2+ mixed-valence layered halide perovskite with strong optical absorption.

ABSTRACT: Introducing heterovalent cations at the octahedral sites of halide perovskites can substantially change their optoelectronic properties. Yet, in most cases, only small amounts of such metals can be incorporated as impurities into the three-dimensional lattice. Here, we exploit the greater structural flexibility of the two-dimensional (2D) perovskite framework to place three distinct stoichiometric cations in the octahedral sites. The new layered perovskites A^I ₄[Cu^II(Cu^IIn^III)_0.5Cl₈] (1, A = organic cation) may be derived from a Cu^I-In^III double perovskite by replacing half of the octahedral metal sites with Cu²⁺. Electron paramagnetic resonance and X-ray absorption spectros

SUBMITTER: Connor BA 

PROVIDER: S-EPMC8246118 | biostudies-literature | 2021 Jul

REPOSITORIES: biostudies-literature