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Electrochemichromic solutions, processes for preparing and using the same, and device manufactured with the same

  • US 5,985,184 A
  • Filed: 10/22/1997
  • Issued: 11/16/1999
  • Est. Priority Date: 09/06/1991
  • Status: Expired due to Fees
First Claim
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1. An electrochromic device for use as an architectural or automotive glazing having a range of transmittance from greater than about 70% to less than about 10%, said device comprising:

  • (a) a first substantially transparent substrate coated with a substantially transparent conductive coating on its interior face having a sheet resistance from about 1 to about 100 ohms per square;

    (b) a second substantially transparent substrate coated with a substantially transparent conductive coating on its interior face having a sheet resistance from about 1 to about 100 ohms per square, said second substrate positioned in substantially parallel spaced apart relationship with said first substrate;

    (c) sealing means positioned toward the peripheral edge of each of said first substrate and said second substrate and sealingly forming a cell cavity therebetween;

    (d) an electrochromic solution capable of color change when an applied potential is introduced thereto having been dispensed into and confined within said cell cavity, said solution comprising;

    (i) at least one anodic compound;

    (ii) at least one cathodic compound; and

    (iii) a solvent; and

    (e) a means for introducing an applied potential to said electrochromic solution to controllably cause a variation in the amount of light transmitted through said device, wherein at least one of said first substrate and said second substrate is constructed from float glass that is coated with a multilayered structure that increases the amount of reflected color inhibited and light transmitted therethrough, said multilayer structure comprising a layer of fluorine-doped tin oxide, and wherein said layer of fluorine-doped tin oxide is undercoated with an anti-iridescence means.

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