Viologen-based flexible electrochromic devices  

作　　者：Wenwen Wu Shanlu Guo Jing Bian Xingyu He Haizeng Li Jianmin Li 

机构地区：[1]College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology),Nanjing University of Posts and Telecommunications,Nanjing 210023,Jiangsu,China [2]Department of Pathology,College of Medicine,University of Cincinnati,Cincinnati 45221,Ohio,USA [3]Optics and Thermal Radiation Research Center,Institute of Frontier and Interdisciplinary Science,Shandong University,Qingdao 266237,Shandong,China

出　　处：《Journal of Energy Chemistry》2024年第6期453-470,I0012,共19页能源化学（英文版）

基　　金：financial support from the National Natural Science Foundation of China(22105106);the Natural Science Foundation of Jiangsu Province of China(BK20210603);the Nanjing Science and Technology Innovation Project for overseas Students(NJKCZYZZ2022–05);the Start-up Funding from NUPTSF(NY221003)。

摘　　要：Electrochromic technology has gained significant attention in various fields such as displays,smart windows,biomedical monitoring,military camouflage,human-machine interaction,and electronic skin due to its ability to provide reversible and fast color changes under applied voltage.With the rapid development and increasing demand for flexible electronics,flexible electrochromic devices(FECDs)that offer smarter and more controllable light modulation hold great promise for practical applications.The electrochromic material(ECM)undergoing color changes during the electrochemical reactions is one of the key components in electrochromic devices.Among the ECMs,viologens,a family of organic small molecules with 1,1'-disubstituted-4,4'-dipyridinium salts,have garnered extensive research interest,due to their well-reversible redox reactions,excellent electron acceptance ability,and the ability to produce multiple colors.Notably,viologen-based FECDs demonstrate color changes in the liquid or semisolid electrolyte layer,eliminating the need for two solid electrodes and thus simplifying the device structure.Consequently,viologens offer significant potential for the development of FECDs with high optical contrast,fast response speed,and excellent stability.This review aims to provide a comprehensive overview of the progress and perspectives of viologen-based FECDs.It begins by summarizing the typical structure and recent exciting developments in viologen-based FECDs,along with their advantages and disadvantages.Furthermore,the review discusses recent advancements in FECDs with additional functionalities such as sensing,photochromism,and energy storage.Finally,the remaining challenges and potential research directions for the future of viologen-based FECDs are addressed.

关 键 词：Flexible electrochromic devices Optical modulation VIOLOGENS Flexible electronics Multifunctional devices ELECTROCHROMISM 

分 类 号：TN383.1[电子电信—物理电子学]