Electrochromic device has broad application prospects in many important fields such as energy-saving buildings, information displays, national defense industry, etc. However, its development is hindered by small optical modulation, insufficient cycling stability, difficulties in large-area fabrication, and limited device functionality. Herein, we illustrate our strategies for the fabrication of nanostructured electrochromic materials, rational design of multifunctional devices, and the characterization of their performance. By analyzing the coupling mechanism between the electrochromic layers and the electrolyte, we proposed a new interface regulation strategy to improve the compatibility of ion and electron transport rate, and developed an electrochromic material with optical modulation of up to 97.7%. By adjusting the interaction between the ink components and the electrode, a novel technology of large-area film formation was established with the compatible feature of the electrochromic layer and the electrode, and a large-size electrochromic device was constructed. A novel system of multifunctional and flexible devices was demonstrated by precisely designing the matching relationship between each functional layer. The application of electrochromism was extended to the fields of wearable intelligent optoelectronic devices and other fields.
 

electrochromic,metal oxides,large size,multifunctional