Flexible electrochromic windows: A comparison using liquid and solid electrolytes

In the present work, two electrochromic devices (or electrochromic windows) based oil intrinsically conducting polymers were assembled and characteriz ed. For both devices, the materials used on the assembling were the same ex cept for the electrolyte layer. III the first, we used as electrolyte a pro pylene carbonate solution and in the second the elastomer poly(epichlorohyd rin-co-ethylene-oxide) is both containing LiClO4. The conductivity of the l iquid electrolyte (10(-3) S cm(-1)) mately two orders of magnitude higher t han for the solid electrolyte and we obtained very good electrochromic prop erties in both cases. The calculated electrochromic efficiency at 640 nm wa s 700 C cm(-2) for the liquid electrolyte device and 360 C cm(-2) for the s olid state device. Solid state electrochromic windows have been investigate d and some of its advantages over windows with liquid electrolytes are disc ussed.