In Situ Formation of Luminescent Perovskite Quantum Dot/Polymer Composites: Scalable Synthesis, Continuous Processing and Functional Applications.

Abstract

Metal halide perovskite quantum dots (QDs) have been considered as new-generation emitters for light conversion fields, including X-ray imaging, displays, and wearable luminescent textiles. Especially when combined with polymers, perovskite QDs not only maintain superior luminance properties and exhibit exceptional stability, but also demonstrate remarkable processability. However, there is still a lack of feasible strategies to achieve large-scale production of perovskite QD-based polymer composites. In this study, a solvent-free "raw material selection-synthesis design-product process (RSP)" strategy is proposed enable to continuously production of perovskite QD/polymer composites using a screw extruder. Rational raw material selection allows QDs to be uniformly dispersed within the polymer matrix, resulting in efficient luminescent features (e.g., the green CsPbBr3 QD/PS composites with a photoluminescence quantum yield (PLQY) of ≈90%). Meanwhile, polymer encapsulation obviously enhances the stability of QDs against the external environment. Importantly, the strategy is a continuous process (only raw material loading is required), which is conductive to scaling up perovskite QDs production from laboratory research to the market. Furthermore, the potential applications of as-prepared QD-based polymer composites is demonstrated in various light conversion fields, such as light-emitting diodes (LEDs), scintillators, displays, and luminescent textiles. This work establishes a comprehensive synthesis-process-application framework for perovskite QDs, paving the way for industrial production.