Electrochromic device with full-color technology

The electrochromic device can switch colors by inducing appropriate potential. There are many advantages, including low driving potential, high contrast, bright color, memory effect [1], and flexibility [2], so they can be applied to displays, e-papers and energy-efficiency windows. However, slow switching speed and full-color are both main faults. Hence, electrochromic devices are only applied to low-class products.