Solid state electrochromic devices
First Claim
1. In an electrochromic device which comprises a conductive second electrode and first electrode separated by a solid electrolyte and an electrochromic material capable of reversible electrochromic interaction with activating electrons or ions under the influence of an electrical potential applied across the electrodes, the improvement wherein the solid electrolyte in the device comprises:
- a) a matrix of cross-linked main polymer chains, having side-chains linked to the main polymer chains, which side chains comprise polar groups,b) a polar aprotic liquid dispersed in the matrix, andc) an ionised ammonium or alkali metal salt dissolved in the matrix or liquid.
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Accused Products
Abstract
An electrochromic device which comprises two conductive electrodes separated by a solid electrolyte and an electrochromic material capable of reversible electrochromic interaction with activating electrons and/or ions furnished to it by, or by it to, the rest of the device under the influence of an electrical potential applied across the electrodes, characterized in that the solid electrolyte in the device comprises:
a) a matrix of optionally cross-linked main polymer chains, having side-chains linked to the main polymer chains, which side chains comprise polar groups,
b) an ionized ammonium or alkali metal salt dissolved in the matrix and/or liquid, and
c) an optional polar aprotic liquid dispersed in the matrix,
and a process for the preparation thereof.
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Citations
9 Claims
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1. In an electrochromic device which comprises a conductive second electrode and first electrode separated by a solid electrolyte and an electrochromic material capable of reversible electrochromic interaction with activating electrons or ions under the influence of an electrical potential applied across the electrodes, the improvement wherein the solid electrolyte in the device comprises:
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a) a matrix of cross-linked main polymer chains, having side-chains linked to the main polymer chains, which side chains comprise polar groups, b) a polar aprotic liquid dispersed in the matrix, and c) an ionised ammonium or alkali metal salt dissolved in the matrix or liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A process for preparing a device which comprises a conductive second electrode and first electrode separated by a solid electroyte and an electrochromic material capable of reversible electrochromic interaction with activating electrons or ions under the influence of an electrical potential applied across the electrodes, the solid electrolyte in the device comprising
a) a matrix of cross-linked main polymer chains, having side-chains linked to the main polymer chains, which side chains comprise polar groups, b) a polar aprotic liquid dispersed in the matrix, and c) an ionised ammonium or alkali metal salt dissolved in the matrix of liquid said process comprising the steps of: -
a) coating a electrochromic material which is capable of being activated by ions onto a first electrode as a thin film on a first support with the solid electrolyte, b) coating a material which is a source of the activating ions onto a second electrode as a thin film on a second support, c) contacting the solid electrolyte with the source material, d) hot-press vacuum laminating all the foregoing integers together, and e) converting any precursor to the solid electrolyte.
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Specification