Resonant cavity electrochromic device
View Patent ↗One exemplary embodiment of an electrochromic device comprises a single cavity Fabry-Pérot filter in which the metal conductive layers forming the cavity are sandwiched by conductive dielectric layers. Another exemplary embodiment of an electrochromic device comprises a dual-cavity Fabry-Pérot filter.
1. An electrochromic device, comprising:
a first electrically conductive dielectric layer;
a first metal conductive layer formed on the first electrically conductive dielectric layer;
a first electrochromic structure comprising a first side and a second side, the first side of the first electrochromic structure being formed on the first metal conductive layer;
a second metal conductive layer formed on the second side of the first electrochromic device;
a second electrochromic structure comprising a first side and a second side, the first side of the second electrochromic structure being formed on the second metal conductive layer;
a third metal conductor layer formed on the second side of the second electrochromic structure; and
a second electrically conductive dielectric layer formed on the third metal conductor layer.
2. The electrochromic device according to claim 1 , wherein a thickness of the electrochromic device is greater than about 300 nm.
3. The electrochromic device according to claim 1 , wherein the first, second and third metal conductor layers form a dual-cavity Fabry-Pérot filter.
4. The electrochromic device according to claim 3 , wherein at least one metal conductive layer comprises one of silver and a silver-based alloy.
5. The electrochromic device according to claim 4 , wherein the silver-based alloy comprises at least one of copper, gold and palladium.
6. The electrochromic device according to claim 3 , wherein at least one of the conductive dielectric layers comprises at least one of indium tin oxide (ITO), fluorine-doped tin oxide, antimony-doped tin oxide, and fluorine-doped zinc oxide.
7. The electrochromic device according to claim 3 , wherein a transmission dynamic range between a clear-state and a colored-state of the electrochromic device is at least about 12:1.
8. The electrochromic device according to claim 3 , wherein the first electrochromic structure comprises an electrochromic (EC) electrode on the first side and a counter electrode (CE) on the second side, and
wherein the second electrochromic structure comprises an electrochromic (EC) electrode on the first side and a counter electrode (CE) on the second side.
9. The electrochromic device according to claim 3 , wherein the first electrochromic structure comprises a counter electrode (CE) on the first side and an electrochromic (EC) electrode on the second side, and
wherein the second electrochromic structure comprises a counter electrode (CE) on the first side and an electrochromic (EC) electrode on the second side.
10. The electrochromic device according to claim 3 , wherein the first electrochromic structure comprises an electrochromic (EC) electrode on the first side and a counter electrode (CE) on the second side, and
wherein the second electrochromic structure comprises a counter electrode (CE) on the first side and a electrochromic (EC) on the second side.
11. The electrochromic device according to claim 3 , wherein the first electrochromic structure comprises counter electrode (CE) on the first side and a electrochromic electrode (EC) on the second side, and
wherein the second electrochromic structure comprises an electrochromic electrode (EC) on the first side and a counter electrode (CE) on the second side.
12. The electrochromic device according to claim 3 , further comprising:
a third conductive dielectric layer formed between the first metal conductive layer and the first electrochromic structure, and
a fourth conductive dielectric layer formed between the third metal conductive layer and the second electrochromic structure.
13. The electrochromic device according to claim 12 , wherein a transmission dynamic range between a clear-state and a colored-state of the electrochromic device is at least about 12:1.
14. The electrochromic device according to claim 13 , wherein the first electrochromic structure comprises an electrochromic (EC) electrode on the first side and a counter electrode (CE) on the second side, and
wherein the second electrochromic structure comprises an electrochromic (EC) electrode on the first side and a counter electrode (CE) on the second side.
15. The electrochromic device according to claim 13 , wherein the first electrochromic structure comprises a counter electrode (CE) on the first side and an electrochromic (EC) electrode on the second side, and
wherein the second electrochromic structure comprises a counter electrode (CE) on the first side and an electrochromic (EC) electrode on the second side.
16. The electrochromic device according to claim 13 , wherein the first electrochromic structure comprises an electrochromic (EC) electrode on the first side and a counter electrode (CE) on the second side, and
wherein the second electrochromic structure comprises a counter electrode (CE) on the first side and a electrochromic (EC) on the second side.
17. The electrochromic device according to claim 13 , wherein the first electrochromic structure comprises counter electrode (CE) on the first side and a electrochromic electrode (EC) on the second side, and
wherein the second electrochromic structure comprises an electrochromic electrode (EC) on the first side and a counter electrode (CE) on the second side.
18. The electrochromic device according to claim 12 , further comprising a fifth conductive dielectric layer formed between the second metal conductive layer and the first electrochromic structure; and
a sixth conductive dielectric layer formed between the second metal conductive layer and the second electrochromic structure.
19. The electrochromic device according to claim 3 , further comprising a third conductive dielectric layer formed between the second metal conductive layer and the first electrochromic structure, and
a fourth conductive dielectric layer formed between the second metal conductive layer and the second electrochromic structure.
20. The electrochromic device according to claim 3 , further comprising:
a first glass substrate comprising a low-e coating;
a second glass substrate; and
an air space formed between the low-e coating of the first glass substrate and the second glass substrate,
the electrochromic device being formed on the low-e coating of the first glass substrate.
21. The electrochromic device according to claim 20 , further comprising a substantially clear plastic film formed between the low-e coating and the electrochromic device.
22. The electrochromic device according to claim 20 , further comprising a tinted plastic film formed between the low-e coating and the electrochromic device.
23. The electrochromic device according to claim 3 , further comprising:
a first glass substrate comprising a low-e coating, the low-e coating comprising at least one silver-based reflector layer;
a second glass substrate; and
an air space formed between the low-e coating of the first glass substrate and the second glass substrate,
the electrochromic device being formed on the low-e coating of the first glass substrate so that one of the first and the second metal conductive layer comprise the at least one silver-based reflector layer of the low-e coating.