Facile Fabrication of Highly Stable and Wavelength-Tunable Tin Based Perovskite Materials with Enhanced Quantum Yield via the Cation Transformation Reaction.

Metal halide perovskites have attracted great attention for their superior light energy conversion applications. Herein, we demonstrated a facile synthesis of zero-dimensional Sn perovskite CsMSnBr(M = K and Rb) material through the cation transformation reaction at room temperature. CsSnBr NCs was mixed with pure metal bromide salts (KBr and RbBr) via the mechanochemical process to successfully synthesize CsMSnBr perovskite where transformation of Cs to mixed Cs/Rb and mixed Cs/K was achieved.