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Green electrochromic materials

  • US 7,808,691 B2
  • Filed: 10/22/2007
  • Issued: 10/05/2010
  • Est. Priority Date: 06/25/2002
  • Status: Active Grant
First Claim
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1. An electrochromic device comprising:

  • (a) a transparent electrode;

    (b) an electrochromic organic material that in a first state is not green and in a second state exhibits a green color, the electrochromic organic material exhibiting a single absorbance band, wherein the green electrochromic organic material exhibiting a single absorbance band comprises an electrochromic polymer based on a fluorinated derivative of 2,5-(2,3-dihydro- thieno[3,4][1,4]-dioxin-5-yl)-3,4-dihydroxy-thiophene, the fluorinated derivative corresponding to 2,5-(2,3-dihydro-thieno[3,4][1,4]-dioxin-5-yl)-3,4-di(R-oxy)-thiophene, with R corresponding to a fluorinated functional group; and

    (c) an electrolyte.

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