Method for deposition of electrochromic layers
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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Abstract
The specification discloses a method for coating a substrate with electrochromic coatings by dipping a substrate having a conductive surface into, or spraying, or spin coating with, a solution prepared by reacting an anhydrous halide of an electrochromically active transition metal with a C1 to C5 anhydrous alcohol, most preferably under a stream of inert gas, at 0 to 80 degrees C. The dipped substrate is removed at a rate necessary to give a desired thickness, and the resulting coating is dried and hydrolyzed and further condensed to create an electrochromically active coating.
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Citations
22 Claims
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1. A method for preparing an electrochromic coating on a substrate having an electrically conductive surface, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22)
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10. The method of claim 10 which includes using a mixture of two or more of said C1 to C5 alcohols.
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20. A method for preparing transition metal coating solutions which are suitable for preparing electrochromic layers and the like comprising:
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forming a first 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 halide 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 first solution during said reaction; forming a second solution by reacting anhydrous halide of a different electrochemically active transition metal with a C1 to C5 anhydrous alcohol, wherein the ratio of said different electrochemically active transition metal halide 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 second solution during said reaction; and blending said two solutions together to form a transition metal dip coating solution.
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Specification