Waterproof and durable luminescent textiles with HPBCD for marine rescue

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It is presented a new type of large-area, functional luminescent textiles fabricated by electrospinning of polymer@perovskite@cyclodextrin@silane composites using CsPbBr3@hydroxypropyl-β-cyclodextrin (HPβCD) composites synthesized mechanochemically by grinding.. After grinding, we mixed CsPbBr3@HPβCD powder, polystyrene (PS) and perfluorooctyltriethoxysilane (PFOS) at designed weight ratios in a binary solvent of N,N′-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) to prepare the electrospinning ink, which was ready to be used for large-area PLTs fabrication via single-nozzle electrospinning. The perovskite luminescent textiles are waterproof and durable in a variety of harsh conditions, offering substantial advantages (i.e. high color purity and good stability) over other Lead halide perovskites composites reported to date. Our demonstrated approach rationally combined the strategies of host-guest chemical interaction, inclusion-like encapsulation and physical blocking, and smartly integrated them into a single fabrication process, which remarkably advances the fabrication of perovskite materials and devices with high throughput and high scalability in a cost-effective manner. We show that such a flexible, stable, durable and safe luminescent textile can be used in a variety of optoelectronic applications, such as high-resolution patterned displays, white LEDs and wearable fluorescence products for marine rescue. This work provides a new perspective for fabricating high-performance perovskite luminescent materials with low-cost advantage and safety warranty. We anticipate that this finding will promote the large-scale production and practical applications of luminescent textiles for next-generation smart and wearable optoelectronics.

These textiles exhibit bright and narrow-band photoluminescence (a photoluminescence quantum yield of 49.7%, full-width at half-maximum <17 nm) and the time to reach 50% photoluminescence of 14,193 h under ambient conditions, showcasing good stability against water immersion (> 3300 h), ultraviolet irradiation, high temperatures (up to 250 °C) and pressure surge (up to 30 MPa). The waterproof PLTs withstood fierce water scouring without any detectable leaching of lead ions.

a Schematic illustration of the fabrication process of PLTs and the as-prepared fibrous membrane under UV light irradiation. b Application of CsPbBr3@HPβCD@PFOS composites in patterned display, white light-emitting diodes (WLEDs) and wearable optoelectronics. SEM (YAG back-scattered electron detector) images of the (c) control fiber and (d) CsPbBr3@HPβCD fiber. e TEM image showing the CsPbBr3@HPβCD fiber without or with PFOS coating as indicated. Note: the top half of the CsPbBr3@HPβCD@PFOS fiber was selectively etched by n-hexane to expose the inner CsPbBr3@HPβCD. f Close-up TEM image of the CsPbBr3@HPβCD@PFOS fiber. Inset: HRTEM image of the CsPbBr3 crystal.

It is worth to see the spectacular supplementary movies,

Tian, T., Yang, M., Fang, Y. et al. Large-area waterproof and durable perovskite luminescent textiles. Nat Commun 14, 234 (2023). https://doi.org/10.1038/s41467-023-35830-8

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