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

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Robust Nanofiber Films Prepared by Electro‐Microfluidic Spinning for Flexible Highly Stable Quantum‐Dot Displays
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2020-11-19 , DOI: 10.1002/aelm.202000626
An‐Quan Xie ₁ , Tingting Cui ₁ , Rui Cheng ₁ , Xingjiang Wu ₁ , Jiazhuang Guo ₁ , Xuan Lu ₁ , Liangliang Zhu ₁ , Su Chen ₁

Affiliation

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.

中文翻译：

通过电微流体纺丝制备的坚固纳米纤维薄膜，用于柔性高稳定性量子点显示器

基于量子点（QD）的液晶显示器（LCD）由于其良好的性能而正在成为新一代的LCD。但是，LCD中的QD荧光材料易受水和高温的影响，严重限制了它们的实际使用和长期使用。在这里，使用坚固的聚（苯乙烯-甲基丙烯酸甲酯-丙烯酸）（poly（St-MMA-AA））纳米颗粒/聚酰胺66纳米纤维（NPs @ PA66）制造用于LCD背光的柔性且超稳定的QD基色彩转换膜具有独特的纤维-颗粒-纤维微结构的薄膜作为保护性基材。通过一种新兴的称为电微流体纺丝技术（EMST）的策略，纳米纤维薄膜不仅具有出色的柔韧性，而且还通过原位粒子介导的增强机制显着提高了机械性能。使用NPs @ PA66纳米纤维薄膜作为QD加载基板的LCD背光灯在600°C的高温下显示116％的宽色域和长期荧光稳定性。更重要的是，NPs @ PA66 / QDs背光灯的荧光寿命高达≈64500h，比封装的夹层聚对苯二甲酸乙二醇酯（PET）QD膜的荧光寿命高≈22倍。这些发现为高强度纳米纤维制造，高稳定性柔性电子产品和光电显示设备提供了一种有前途的方法。比使用封装的夹层聚对苯二甲酸乙二醇酯（PET）QD薄膜高≈22倍。这些发现为高强度纳米纤维制造，高稳定性柔性电子产品和光电显示设备提供了一种有前途的方法。比使用封装的夹层聚对苯二甲酸乙二醇酯（PET）QD薄膜高≈22倍。这些发现为高强度纳米纤维制造，高稳定性柔性电子产品和光电显示设备提供了一种有前途的方法。

更新日期：2021-01-14

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