Stable electrochromic module
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United States of America Patent
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Oct 20, 2015
Grant Date -
Dec 19, 2013
app pub date -
Mar 2, 2012
filing date -
Mar 4, 2011
priority date (Note) -
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Abstract
An electrochromic module including a first substrate and a second substrate is provided in which the first and/or the second substrate are/is electrically conductive or are/is equipped with an electrically conductive coating. An electrochromic polymer coating is arranged on the substrate or the conductive coating, an ion storage layer is arranged on the substrate or the conductive coating, and a polymer gel electrolyte is disposed in an electrically in-series connection between the electrochromic coating and the ion storage layer. The electrochromic polymer is a polymer of tetraarylbenzidine and (hetero)aromatic diol, which can be switched reversibly between redox states in a voltage-controlled manner. The condensation polymer is colorless in one redox state and colored in at least two redox states. The inventive modules achieve a large number of switching cycles without an appreciable decrease in the electrochromic properties, a high electrochromic contrast and a high electrochromic efficiency with effective switching kinetics.
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