Simple one-step synthesis of a two-dimensional perovskite consisting of perfluoroalkyl-based ammonium spacers using acetone as the solvent

Abstract

Acetone, regarded as a poor solvent for perovskite materials, was found to be suitable for synthesis of the perfluoroalkyl-based two-dimensional (2D) perovskite (C₃F₇CH₂NH₃)₂PbBr₄. One-step synthesis gave this material as a pure phase exhibiting quantum- and dielectric-confinement effects. However, N,N-dimethylformamide (DMF), a traditional perovskite solvent, did not produce these properties.