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 univer-sal strategy for the structural and functional integration of all -inor-ganic 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 -resolu-tion, 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 ma-terials with unprecedented functionalities in diverse fields.

Automated summary

In this study, a universal strategy for the integration of inorganic perovskite quantum dots (PQDs) and polymers was reported. By designing and synthesizing photopolymerizable CsPbX3 (X = Cl, Br, I) QD inks with enhanced stability, high-resolution, multicolored fluorescent patterns were achieved on surface-silanized polymers through high-throughput photolithography and inkjet printing. The covalent bonding at the organic-inorganic interface ensured the patterns could be freely stretched and folded without delamination. Furthermore, a light-driven self-deployable information display was demonstrated by integrating photopolymerizable PQDs with a 4D-printed shape-morphing liquid crystal elastomer. This research expands the emerging applications of perovskite-polymer materials with unprecedented functionalities.