Electrochromic media with concentration-enhanced stability,...

Details Electrochromic media with concentration-enhanced stability,... Electrochromic media with concentration-enhanced stability,...

C - Chemistry, Metallurgy

09

K

C09K 9/02 (2006.01) G02B 5/23 (2006.01) G02F 1/15 (2006.01)

Patent

CA 2335270

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.

Selon cette invention, on améliore la stabilité de dispositifs électrochromiques contenant un milieu électrochromique à un ou à plusieurs composés électroactifs en établissant des concentrations de limitation de courant pour les composés électroactifs présentant une plus grande différence de potentiel d'oxydo-réduction. En outre, cette invention concerne un procédé de production de dispositifs électrochimiques utilisant des concentrations ciblées de matériaux électroactifs au cours de la préparation du milieu électrochromique, ce qui évite quasiment d'avoir à produire de dispositifs limiteurs de courant en utilisant un composé électroactif à faible différence de potentiel d'oxydo-réduction.

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