Abstract：
Lead halide perovskites possess great application potential in flexible displays and wearable optoelectronics owing to their prominent optoelectronic properties. However, the intrinsic instability upon moisture, heat, and ultraviolet (UV) light irradiation hinders their development and application. In this work, an ultra-stable CsPbX3 (X = Cl, Br, I) perovskite luminescent filament (PLF) with high stretchability (≈2400%) and luminescence performance (photoluminescence quantum yield (PLQY) of 24.5%, tunable emission spectrum, and high color purity) is introduced by a facile environmental-friendly wet-spinning technology via solvent extraction. Benefiting from the in situ encapsulation of the hydrophobic thermoplastic polyurethane (TPU) and the chelation of Lewis base CO in TPU with Lewis acid Pb2+, the CsPbBr3 PLF demonstrates ultra-high photoluminescence (PL) stability when stored in ambient air and high humidity circumstance, annealed at 50 °C, and dipped in water for 30 days, illuminated under ultraviolet light for 300 min, and immersed in organic solvents and solutions with pH of 1-13 for 5 min, respectively. Impressively, it retains 80% of its initial PL after being recycled five times. Overall, the CsPbX3 PLF demonstrates promising prospects in multifunctional applications, including organic dyes and tensile strain sensing, flexible pattern displays, secondary anti-counterfeiting, and hazard warning systems.
摘要：
卤化铅钙钛矿由于其突出的光电特性，在柔性显示器和可穿戴光电子学中具有巨大的应用潜力。然而,水分的内在不稳定性，热,和紫外线照射阻碍了它们的发展和应用。在这项工作中,超稳定的CsPbX3（X=Cl，Br,I）具有高拉伸性（〜2400％）和发光性的钙钛矿发光长丝（PLF）通过溶剂萃取（具有0.7m/min的高生产率和1.56USD/100m的低成本），通过一种简单的环保湿法纺丝技术引入。CsPbX3PLF显示均匀发光（光致发光量子产率为24.5%），可调谐发射光谱，颜色纯度高。得益于疏水性热塑性聚氨酯（TPU）的原位包封作用以及TPU中Lewis碱C=O与Lewis酸Pb2的螯合作用，当储存在环境空气和高湿度环境中时，CsPbBr3PLF具有超高光致发光（PL）稳定性，在50°C退火，在水中浸泡30天,在紫外光下照射300分钟，并浸入pH为1-13的有机溶剂和溶液中5分钟，分别。令人印象深刻的是,回收5次后，它保留了其初始PL的80％。总的来说,CsPbX3PLF在多功能应用中展示了有希望的前景，包括有机染料和拉伸应变传感，灵活的图案显示，二次防伪,和危险警告系统。本文受版权保护。保留所有权利。
