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Method for deposition of electrochromic layers

  • US 4,855,161 A
  • Filed: 02/19/1987
  • Issued: 08/08/1989
  • Est. Priority Date: 02/19/1987
  • Status: Expired due to Fees
First Claim
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1. A method for preparing an electrochromic coating on a substrate having an electrically conductive surface, comprising:

  • preparing a coating solution by reacting an anhydrous halide of an electrochromically active transition metal with a C1 to C5 anhydrous alcohol, wherein the ratio of transition metal halid to alcohol is from about 5 to 20 weight/volume percent, at 0 to 80 degrees C. while simultaneously passing a stream of gas over said coating solution during said reaction;

    coating the conductive surface of said substrate with the resulting solution to give a coating of a desired thickness; and

    drying and hydrolyzing and further condensing said coating to an electrochromically active coating.

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