ELECTROCHROMIC DEVICE

• US 20140002883A1
• Filed: 06/26/2013
• Published: 01/02/2014
• Est. Priority Date: 06/27/2012
• Status: Active Grant

• Current Assignee: LG Innotek Company Limited (LG Corporation)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: JUN, Sung Gon, CHOE, Hae Min, SHIN, Yun Ho
• Granted Patent: US 9,052,561 B2
• Time in Patent Office: Days
• US Class Current: 359/269
• CPC Class Codes: B60R 1/085 using a combination of interchangeable reflecting surfaces, e.g. reversible mirrors
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: G02F 1/15 based on an electrochromic effect
• CPC Class Codes: G02F 1/1508 using a solid electrolyte
• CPC Class Codes: G02F 1/15165 Polymers
• CPC Class Codes: G02F 1/155 Electrodes
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices
• CPC Class Codes: G02F 2203/02 reflective
• CPC Class Codes: G09G 3/38 using electrochromic devices

Abstract

Provided is an electrochromic device including: two substrates opposed to each other; an electrode and a conductive reflection layer interposed between the two substrates; a first electrochromic coating layer interposed between the electrode and the conductive reflection layer; and an electrolyte layer interposed between the first electrochromic coating layer and the conductive reflection layer, whereby uniform discoloration and decolorization can be performed, the efficiency of power consumption can be enhanced, and a durability of the device and the speed of a decolorization reaction can be improved.

Claims

1. An electrochromic device, comprising:

two substrates opposed to each other;

an electrode and a conductive reflection layer formed between the two substrates; and

a first electrochromic coating layer interposed between the electrode and the conductive reflection layer.

2. The electrochromic device according to claim 1, wherein the first electrochromic coating layer is formed by coating a material on a substrate on which the electrode is formed.

3. The electrochromic device according to claim 2, wherein the coating material is an organic material or an inorganic material.

4. The electrochromic device according to claim 3, wherein the organic material comprises any one selected from the group consisting of viologen, anthraquinone, polyaniline, polypyrrole and polythiophene.

5. The electrochromic device according to claim 3, wherein the inorganic material comprises any one selected from the group consisting of WO₃, MoO₃, CeO₂, MnO₂ and Nb₂O₅.

6. The electrochromic device according to claim 1, further comprising an electrolyte layer interposed between the first electrochromic coating layer and the conductive reflection layer.

7. The electrochromic device according to claim 6, wherein at least one of the two substrates is a transparent substrate.

8. The electrochromic device according to claim 7, wherein the two substrates refer to a first substrate above which the first electrochromic coating layer is formed, and a second substrate on which the conductive reflection layer is formed.

9. The electrochromic device according to claim 8, wherein the electrode formed on the first substrate is a transparent electrode.

10. The electrochromic device according to claim 9, wherein the electrode (130) is any one selected from the group consisting of an ITO (Indium doped Tin Oxide), an AZO (Aluminium doped Zinc Oxide), a GZO (Galium doped Zinc Oxide), an ATO (Antimony doped Tin Oxide), an FTO (Fluorine doped Tin Oxide), an IZO (Indium doped Zinc Oxide), an NTO (Niobium doped Titanium Oxide) and ZnO, and a combination thereof.

11. The electrochromic device according to claim 8, wherein the conductive reflection layer is composed of at least one metal selected from the group consisting of Cu, Au, Ag, Ni, Al, Cr, Ru, Re, Pb, Sn, In, and Zn, or an alloy thereof.

12. The electrochromic device according to claim 1, further comprising a second electrochromic coating layer interposed between the electrolyte layer and the conductive reflection layer.

13. The electrochromic device according to claim 12, wherein the second electrochromic coating layer is formed of the same material as that of the first electrochromic coating layer.

14. The electrochromic device according to claim 12, wherein the second electrochromic coating layer is formed by coating the material on the substrate on which the conductive reflection layer is formed.

15. The electrochromic device according to claim 1, further comprising an electrode connection part provided on each end of the two substrates.

16. The electrochromic device according to claim 6, further comprising a second electrochromic coating layer interposed between the electrolyte layer and the conductive reflection layer.

17. The electrochromic device according to claim 6, further comprising an electrode connection part provided on each end of the two substrates.