Waterproof, Self-Adhesive, and Large-Area Luminescent Perovskite–Polymer Fiber Membranes

Abstract

Recently, waterproof lighting and luminescent displays have been achieved in perovskite–polymer composite materials. However, practical large-area display applications are still limited to the strong electrostatic adhesion (EA) and high productivity. To overcome these deficiencies, large-area (~ 600 cm²) homogeneous perovskite–polymer fiber membranes (PPFMs) are synthesized by an electrospinning strategy in this work. Due to the microscopic cladding of the hydrophobic polymer fibers, the electrospun PPFMs exhibit ultrastable underwater luminescence for more than 90 days, and strong EA to diverse materials without pretreatments or additional adhesives. Moreover, by utilizing a proposed programmable laser lithography strategy, designed PPFM patterns are fabricated as the assembly blocks of large-area colorful or tridimensional displays. Interestingly, due to laser thermal ablation effects, the disengaged edges of these blocks are self-stitched with high mechanical stability and operability. This work provides a simple and effective strategy to realize waterproof, self-adhesive, and large-area display applications of perovskite nanomaterials in real world settings.

Graphical Abstract

Large-area perovskite–polymer fiber membranes are synthetized by an electrospinning strategy. Underthe microscopic cladding of hydrophobic polymer fibers, the composite membranes of perovskite nanocrystals fully embedded exhibit ultrastable underwater luminescence for more than 90 days, it also demonstrates  excellent flexibility and good self-adhesion to diverse materials. Moreover, designed colorful membrane patterns can be fabricated by a proposed programmable laser lithography strategy, and used as assembly blocks of large-area two-dimensional or tridimensional displays.

Funding

the Key Project of the National Key R&D program of China(Grant Nos. 2022YFA1404500); National Natural Science Foundation of China (NSFC)(62005183); National Natural Science Foundation of China (NSFC)(12074267); Science and Technology Planning Project of Guangdong Province(2020B010190001); Guangdong Natural Science Funds Grant(2021A1515012069)