Method for depositing high performing electrochromic layers
First Claim
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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Accused Products
Abstract
An electrochromic coating is produced by adding an organic moiety to a solution of an electrochromic precursor, said organic moiety having a decomposition temperature greater than, or a vapor pressure sufficiently low at, the temperature at which solution solvent is removed, such that said organic moiety remains integral with the electrochromic precursor coating on said substrate after said solvent evaporates, and said organic moiety having a decomposition temperature lower than, or a vapor pressure sufficiently high at, the temperature at which said electrochromic precursor coating is converted to an electrochromic coating that said moiety is substantially removed from said coating before or during said conversion.
245 Citations
38 Claims
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1. A method of forming an electrochromic coating on a substrate having an electrically conductive surface comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An electrochromic coating on a substrate having an electrically conductive surface formed by:
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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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Specification