Patent ID: 8102587

Claim:
An electrochromic device comprising, between a carrier substrate transparent in the infrared range and a counter-substrate, a multilayer stack, wherein the multilayer stack comprises, in succession: a) a metal grid transparent in the infrared range, forming a first electrode; b) an electrochromic functional system comprising a layer of an ion-storage first electrochromic material, at least one layer having an electrolytic function, and a layer of a second electrochromic material; c) a metal layer capable of reflecting the infrared radiation, forming a second electrode; and d) a lamination interlayer comprising a thermoplastic polymer, wherein e) the substrate and the counter-substrate comprise, sapphire or silicon or germanium or zinc sulfide or zinc selenide or cadmium telluride, or calcium fluoride, or barium fluoride or magnesium fluoride, or glass transparent to infrared, or polyethylene, wherein the electrochromic device has controlled infrared reflection.