Multicolour electrochromic displays are one of the most versatile applications because they can retain their colored states without the need to supply electrical power. However, the simultaneous colouration of the counter layer when operating a conventional electrochromic display restricts the color overlay effects. Additionally, the operation of conventional electrochromic displays requires external voltages to trigger the colouration/bleaching processes, which makes the conventional electrochromic displays far from a net-zero energy consumption technology.
Click here for original story, Transparent inorganic multicolour displays enabled by zinc-based electrochromic devices
Source: Phys.org