The top-down synthesis of single-layered Cs4CuSb2Cl12 halide perovskite nanocrystals for photoelectrochemical application

Herein, lead-free single-layered Cs₄CuSb₂Cl₁₂ and Cs₃M₂X₉ (X = Cl, Br, I; M = Sb, Bi) perovskite NCs have been prepared for the first time via a top-down liquid-phase ultrasonic exfoliation technique.