Dr. Klaus Bange and Dr. Thomas Gambke
Adjustable adsorption and reflectance of visible and near infrared wavelength light is a property of electrochromic materials which make possible active optical filters, smart windows and a number of display technologies. The materials, both inorganic, e.g. WO3, and organic, e.g. viologens, are incorporated into electrochromic devices (ECDs). The different approaches to ECDs (see Figure) are discussed and thed materials used reviewed.