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Coupled electrochromic compounds with photostable dication oxidation states

  • US 6,560,004 B2
  • Filed: 06/19/2001
  • Issued: 05/06/2003
  • Est. Priority Date: 07/09/1999
  • Status: Expired due to Term
First Claim
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1. An electrochromic device, comprising:

  • a first substantially transparent substrate having an electrically conductive material associated therewith;

    a second substrate having an electrically conductive material associated therewith; and

    an electrochromic medium contained within a chamber positioned between the first and second substrates which comprises two or more electroactive compounds, at least one of the electroactive compounds being a coupled electrochromic compound comprising a first anodic monomeric electrochromic compound coupled by a bridge comprising a covalent bond or an intervening hydrocarbon structure optionally containing one or more heteroatoms, to a second anodic monomeric electrochromic compound, and optionally additional monomeric electrochromic compounds such that electronic communication is exhibited between the anodic monomeric compounds.

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