Foldable Electrochromics Enabled by Nanopaper Transfer Method

• Published in: Advanced functional materials Vol. 25; no. 27; pp. 4203 - 4210
• Main Authors: Kang, Wenbin, Yan, Chaoyi, Foo, Ce Yao, Lee, Pooi See
• Format: Journal Article
• Language: English
• Published: Blackwell Publishing Ltd 01.07.2015
• Subjects: Deformation; Devices; electrochromics; Electrochromism; Electrodes; Electronics; foldable electronics; Formability; nanopaper; nanopaper transfer; Nanostructure; Surface properties; transparent conductive electrodes
• ISSN: 1616-301X; 1616-3028
• DOI: 10.1002/adfm.201500527

An innovative nanopaper‐transfer method enabled by the high surface free energy of nanocellulose is reported. Utilizing this technique, Ag nanowire percolating network based transparent conductive electrodes with ultrahigh figure of merit are realized. With the exceptional surface properties of this novel nanopaper electrode, a foldable electrochromic nanopaper device with a stable performance is demonstrated for the first time. This nanopaper‐transfer technique holds great promise for the next generation deformable electronics. A facile nanopaper transfer strategy is developed for foldable transparent conductors of high quality. Electrochromic nanopaper that maintains a stable performance under repeated folding is demonstrated. The exceptional surface properties of nanocellulose endow a stable cycling and efficient coloration with the electrochromic device. The nano­paper transfer technique creates new opportunities for the next generation deformable electronics.