| 摘要 |
Disclosed is an electrochromic display having an electrolyte of optimized cationic mobility and a counter electrode of optimized electronic mobility. Preferably the display comprises (a) a front substrate with selectively actuable transparent electrodes and image-forming electrochromic layers thereon, (b) an acidified aqueous electrolyte containing a sufficient quantity of highly mobile hydrogen ions for coloration of the electrochromic layers and (c) a rear substrate spaced from the front substrate carrying a counter electrode in contact with the electrolyte, the counter electrode being in the form of a layer comprising predominantly an alkali tungsten bronze, preferably sodium and or potassium tungsten bronze, in the high temperature heat treated condition which exhibits enhanced electronic mobility. A process for making the display is also disclosed.
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