The a-WO3/a-IrO2 electrochromic system

This article reviews the electrochemistry and optical switching performance of variable transmittance electro- chromic devices based on the a-W03/a-Ir02 (a=amorphous) combination of electrochromic materials. The review concentrates on past research at EIC Laboratories on a-W03/a-IrO2 devices containing polymeric proton (HAƒÂ·) conductors with an ancillary discussion of devices using c-1(A¢â‚¬A¾W03,(,4) and the mixed oxide a-MoxWi-x - 03 as the primary electrochromic material. Approximately one half of the data presented has not been published pre- viously, with the remaining data taken from articles in earlier SPIE volumes and the journal Solar Energy Materi- als.