Low cost quasi solid state electrochromic devices based on F-doped tin oxide and TiO2

In recent past, electrochromic devices (ECDs) have attracted much attention due to their potential applications as display devices with low power consumption. In the present study, we investigated the possibility of replacing expensive WO3 and CeO2 with low cost, transparent and nano-crystalline, titanium dioxide (TiO2) as the electrochromic material and F-doped tin oxide (FTO) glass substrate as the counter electrode respectively. A quasi solid polymeric electrolyte composed of lithium chloride (LiCl), was employed as the electrolyte. The device changes its transmission between 63% (bleached state) and 0.98% (colored state) at the wavelength of 600 nm at 3.7 V. (C) 2019 Elsevier Ltd.