Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays

Abstract

Quantum dot (QD)‐based liquid crystal displays (LCDs) are emerging as a new generation of LCDs due to their good performance. However, the QD fluorescent materials in LCDs are vulnerable to water and high temperatures, severely limiting their practical and long‐term use. Here, flexible and ultrastable QD‐based color‐converting films for LCD backlights are fabricated using robust poly(styrene‐methyl‐methacrylate‐acrylic acid) (poly(St‐MMA‐AA)) nanoparticle/polyamide 66 nanofiber (NPs@PA66) film with unique fiber–particle–fiber microstructure as protective substrate. Through an emerging strategy called electro‐microfluidic spinning technology (EMST), the nanofiber film not only exhibits excellent flexibility but also remarkably improves the mechanical property via the in situ particle‐mediated enhancement mechanism. An LCD backlight using the NPs@PA66 nanofiber film as QD loading substrate shows a wide color gamut of 116% and long‐term fluorescence stability under high temperature of 200 °C. More importantly, the fluorescence lifetime of NPs@PA66/QDs backlight reaches up to ≈64500 h, ≈22 times higher than that using encapsulated sandwiched polyethylene terephthalate (PET) QD film. These findings offer a promising method toward high‐strength nanofiber manufacturing, high‐stability flexible electronics and optoelectronic display devices.

Carbon Dot-Functionalized Colloidal Particles for Patterning and Controllable Layer-Structured Photonic Crystals Construction

“…Here the CDs-functionalized monodisperse P­(S-MMA-AA) hybrid particles are enriched with abundant amino and carboxyl groups inherited from as-grafted CDs, providing a lot of binding sites to couple with each other. The CDs/P­(S-MMA-AA) particles connected by hydrogen bonds between amino and carboxyl groups have a strong binding force, greatly reducing the occurrence of cracks during the assembly process (Figure a). , Obviously, compared with the pristine P­(S-MMA-AA) film, the cracks of the CDs/P­(S-MMA-AA) film are significantly reduced (Figure b,c). By the assistance of G3-PAMAM and functional CDs, large-scale assembly of the crack-free PC film on an A4 glossy paper can be achieved easily via the spiral bar coating method (Figure S5).…”

From 1D Nanofibers to 3D Nanofibrous Aerogels: A Marvellous Evolution of Electrospun SiO2 Nanofibers for Emerging Applications

“…In general, the electrospun SNFs are randomly arranged and disordered due to the limitation of bending instability of highly charged jet [ 128 ]. Therefore, even after calcination, it does not change its existence in the form of nonwoven mats.…”

Stable and large-scale organic–inorganic halide perovskite nanocrystal/polymer nanofiber films preparedviaa greenin situfiber spinning chemistry method

“…Further, it also delivers an ideal way for a controlled assembly of multi-component materials using microfluidic chips in the spinning process. 34,35 Based on the FSC strategy, our group realized the mass production of PNCs using microfluidic blowspinning, demonstrating the feasibility of this strategy. 36 Herein, we constructed highly ordered, homogeneous and dense organic-inorganic halide PNC/polymer nanofiber films by employing the electro-microfluidic spinning technique.…”