Stable electrochromic module

摘要

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.

主权项

1. An electrochromic module comprising a first substrate, a second substrate, the first and/or second substrate being either electrically conductive or having been provided with an electrically conductive coating, a coating of an electrochromic polymer disposed on the substrate or the conductive coating, an ion storage layer disposed on the substrate or the conductive coating and an electrically series-connected electrolyte disposed between the electrochromic coating and the ion storage layer,
wherein the electrochromic polymer is an essentially linear condensation polymer which has been formed from a tetraarylbenzidine and a (hetero)aromatic diol and can be switched reversibly under voltage control between more than two redox states, the condensation polymer being colorless in one redox state and colored in at least two redox states, and the electrolyte is a polymeric gel electrolyte.