Toward solid-state switchable mirrors using a zirconium oxide proton conductor

The unique optical properties of magnesium rare-earth alloys are interestin g for making new types of solid-state electrochromic devices, based on hydr ogen transport. These devices can reversibly switch between a transparent a nd a reflective state, when a potential difference is applied. The all-soli d state devices presently studied involve a zirconium oxide proton conducto r. This paper discusses the deposition and preliminary characterisation of the solid-state electrolyte. It also gives some information about the perfo rmance of a symmetrical GdMg device tested in a hydrogen gas atmosphere. Th is stack is composed of a GdMgHx/Pd bottom electrode, a ZrO2 . (H2O)(2) . [ H-2](y) proton conductor and a Pd/GdMgHy/Pd top-electrode. (C) 2001 Elsevie r Science B.V. All rights reserved.