Advance in research on electrochromic materials and devices

Electrochromic (EC) materials have extensive applied prospects as one of the intelligent materials and have been used for some devices. In this review, we report their electrochromism and preparation; NiO_x and WO_3 films prepared in our laboratory were emphasized especially. The application and fabrication of EC devices were discussed also. Besides them, we introduce yet other key materials used for these EC devices, such as transparent conducting glass, ionic conducting electrolyte etc. In the end, the research and development of the future about EC materials and devices were given.