Interfacial Structural Transformation for the Synthesis of Lead-Free Double Perovskite Nanocrystals.

Lead-free halide double perovskite nanocrystals have emerged as one of the most promising alternatives to lead halide perovskite nanocrystals due to their non-toxicity, high stability, and outstanding optoelectronic properties. However, conventional synthesis methods often result in impurities due to increased constituent elements. In this study, an efficient water-oil biphasic interface-driven approach is introduced for synthesizing lead-free double perovskite nanocrystals, enabling controlled structural transformations from 0D to 2D and 3D structures.