A nano-liter droplet-based microfluidic reactor serves as continuous large-scale production of inorganic perovskite nanocrystals

Lead halide perovskite nanocrystals (NCs) exhibit high photoluminescence quantum yield (PLQY), defect tolerance, narrow half peak width, and wide luminous gamut, making them the ideal optoelectronic materials in numerous fields. Nonetheless, their production still suffers from limited productivity at bench level. In this work, we fabricated CsPbX3 (X = Cl, Br, I) NCs within droplet-based micro-reactors, where both nucleation growth processes could be precisely controlled inside 130-nL microdroplets. This provides a new paradigm for large-scale synthesis of with PLQY. Compared other synthetic methods, method can increase concentration reactant precursors by 3–116 times, while lowering ligand to ratio 2%–50% commonly used hot-injection method. By modulating reaction temperature residence time, structure-function relationship between morphology PL properties was extensively investigated. The microfluidic-based process allows flexible adjustment proportion PbX2 achieve fabrication whose luminescence range covers entire visible spectrum (406–677 nm) one reaction. Finally, different ions were encapsulated polymethyl methacrylate prepare colored light-emitting diode strip.