Electrochromic media with concentration-enhanced stability, process for the preparation thereof and use in electrochromic devices
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United States of America Patent
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Oct 24, 2000
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app pub date -
Apr 30, 1999
filing date -
Apr 30, 1999
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Abstract
Increased stability of electrochromic devices containing an electrochromic medium having two or more electroactive compounds is accomplished by establishing current limiting concentrations of electroactive compounds with the larger redox potential difference. A process for production of electrochromic devices uses targeted concentrations of electroactive materials during preparation of the electrochromic medium which results in substantially no devices being produced wherein the current is limited by an electroactive compound having a low redox potential difference.
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