Flexible electrochromic fiber with rapid color switching and high optical modulation  

作　　者：Tianxue Zhu Jiaqing Xiong Jingwei Chen Xinran Zhou Guofa Cai Yuekun Lai Pooi See Lee 

机构地区：[1]National Engineering Laboratory for Modern Silk,College of Textile and Clothing Engineering,Soochow University,Suzhou 215123,China [2]School of Materials Science and Engineering,Nanyang Technological University,50 Nanyang Avenue,Singapore 639798,Singapore [3]College of Chemical Engineering,Fuzhou University,Fuzhou 350116,China [4]Qingyuan Innovation Laboratory,Quanzhou 362801,China [5]Innovation Center for Textile Science and Technology,Donghua University,Shanghai 201620,China

出　　处：《Nano Research》2023年第4期5473-5479,共7页纳米研究（英文版）

基　　金：supported by National Research Foundation Investigatorship(No.NRF-NRFI201605)。

摘　　要：Though flexible electrochromic devices have shown huge potential application in the fields of safety warning,display and smart windows,limited attention was paid on preparing flexible electrochromic fiber because of the difficulty in fabricating the multilayer electrochromic device structure in one-dimensional form.In this study,a flexible electrochromic nylon fiber based on Ag nanowires(NWs)/PEDOT:PSS/WO3 nanoparticles(NPs)(PEDOT:PSS=poly(3,4-ethylenedioxythiophene):polystyrenesulfonic acid)is successfully fabricated,delivering rapid color switching(2.5 and 9 s for bleaching and coloration)and high optical modulation(65.5%at 633 nm),and sustainable to repeated mechanical deformations.Ag NWs,PEDOT:PSS and WO3 NPs were dip-coated on the nylon fiber,resulting in an electrochromic fiber electrode with stable fiber resistance of 50-100Ω/10 cm,which can withstand mechanical deformation against 300 times of bending cycles with bending radius of 0.5 cm,and sustain 30 times of tape-peeling.During the galvanostatic tests,the capacitance of the electrochromic electrode can maintain 70%of the initial value even after 5,000 times of charge-discharge cycles.Even in knotted shape,the fiber still shows excellent color contrast.This study provides a novel method to construct flexible electrochromic fiber and pave the way for the development of flexible optoelectronic devices,such as flexible and wearable displays.

关 键 词：FLEXIBLE electrochromic FIBER WO3 nanoparticle 

分 类 号：TB383[一般工业技术—材料科学与工程]