Fibrous Nanoreactors from Microfluidic Blow Spinning for Mass Production of Highly Stable Ligand‐Free Perovskite Quantum Dots

Abstract

AbstractNano‐/micro‐reactors have emerged as a powerful platform for chemical synthesis. Here, we develop fiber‐spinning chemistry (FSC) based on a microfluidic blow spinning (MBS) technique, allowing the availability of nanoreactors for chemical synthesis with scale‐up capacities. Proof‐of‐concept experiments focus on the utilization of MBS‐derived fibrous nanoreactors for large‐scale production of ligand‐free perovskite quantum dots (PQDs) in one step. Typically, methylammonium lead halide (MAPbX3, X=Cl, Br, and I) PQDs in situ synthesized at large scale inside polyacrylonitrile (PAN) nanofiber films (size 120 cm ×30 cm per hour), exhibit high photoluminescence (PL) quantum yield (QY) of 71 %, tunable emissive peaks (448–600 nm), and superb PL stability. The PQDs/polymer nanofiber films are potentially useful for CO2 conversion, wide‐color‐gamut displays and light‐emitting diode (LED) devices. These findings may guide the development of nano‐/micro‐reactor technology for scale‐up production of nanomaterials with various potential applications.