Method for depositing high performing electrochromic layers

  • US 5,277,986 A
  • Filed: 07/15/1992
  • Issued: 01/11/1994
  • Est. Priority Date: 07/15/1992
  • Status: Expired due to Fees
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First Claim
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1. A method of forming an electrochromic coating on a substrate having an electrically conductive surface comprising:

  • providing a substrate having an electrically conductive surface;

    providing a solution of an (1) electrochromic precursor, which can be converted to an electrochromic material, and (2) a removable moiety in (3) a carrier solvent;

    said solvent, said moiety and said electrochromic precursor being selected such that said solvent is preferentially removed in a first removal step from a coating of said solution, leaving a matrix film of said electrochromic precursor and said moiety, and said moiety is preferentially removed from said matrix in a second removal step, prior to or during conversion of said electrochromic precursor to an electrochromic material;

    coating the conductive surface of said substrate with said solution to form a coated substrate having a coating of a desired thickness;

    removing said solvent from said coating in a first removal step to form an electrochromic precursor/moiety matrix film on said substrate;

    performing a second removal step to remove moiety from said matrix; and

    converting said electrochromic precursor to an electrochromic material to form an electrochromic coating.

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