Studies of solid state electrochromic devices based on PEO/siliceous hybrids doped with lithium perchlorate

Abstract

Sol–gel hybrid organic-inorganic networks, doped with a lithium salt, have been deposited on tungsten oxide (WO3) films by spin-coating to produce a prototype smart window. The work described in this presentation is focused on the use of these networks as dual-function electrolyte/adhesive components of solid-state electrochromic devices. The performance of multi-layer electrochromic devices was characterized as a function of the precursor used to prepare the polymer electrolyte component and the guest salt concentration. The preliminary results obtained during the study of electrochromic devices are also reported. Electrochromic parameters, such as coloration efficiency, optical contrast and stability were evaluated. The prototype devices assembled exhibited stable electrochromic performance and good open-circuit memory.