Robust integration of polymerizable perovskite quantum dots with responsive polymers enables 4D-printed self-deployable information display

The development of highly luminescent perovskite quantum dots (PQDs) that can effectively merge with functional polymers is of paramount importance for next-generation flexible, printable, and wearable photonics and optoelectronics. Here, we report a universal strategy for the structural and functional integration of all-inorganic PQDs and polymers, which is enabled by judicious design and synthesis of photopolymerizable CsPbX3 (X = Cl, Br, I) QD inks with significantly enhanced environmental stability. High-resolution, multicolored fluorescent patterns are obtained by high-throughput photolithography and inkjet printing of highly stable, solution-processable, and photopolymerizable PQDs on surface-silanized polymers, which can be freely stretched and folded without delamination thanks to the robust covalent bonding at the organic-inorganic interface. As a proof-of-concept illustration, a light-driven self-deployable information display is demonstrated through covalent integration of photopolymerizable PQDs with a 4D-printed shape-morphing liquid crystal elastomer. This research will broaden the emerging applications of perovskite-polymer materials with unprecedented functionalities in diverse fields.