Method for deposition of electrochromic layers
AssigneeDonnelly Corporation
InventorsFrank H. Moser, Niall R. Lynam
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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 C.sub.1 to C.sub.5 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.
Claims22
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 C.sub.1 to C.sub.5 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.
The method of claim 10 which includes using a mixture of two or more of said C.sub.1 to C.sub.5 alcohols.
A method for preparing transition metal coating solutions which are suitable for preparing electrochromic layers and the like comprising:
- forming a first solution by reacting an anhydrous halide of an electrochromically active transition metal with a C.sub.1 to C.sub.5 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 C.sub.1 to C.sub.5 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.
Dependencies are inferred from the claim text.