Electrochromic device

Patent metadata

Field	Value
Publication number	US-9581876-B1
Application number	US-201615009567-A
Country	US
Kind code	B1
Filing date	Jan 28, 2016
Priority date	Dec 15, 2015
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

Provided is an electrochromic device and a method for driving the electrochromic device, the electrochromic device including a first electrode, a first electrochromic layer, an electrolyte layer, a second electrochromic layer, and a second electrode which are laminated in sequence, at least one selected from among the group consisting of the first and second electrochromic layers and the electrolyte layer including scattering particles, and the electrochromic device further including an additional layer that contains the scattering particles and is disposed between the electrolyte layer and the first or second electrochromic layer.

First claim

What is claimed is:

1. An electrochromic device comprising:
a first substrate and a second substrate that face each other; a first electrode on a surface of the first substrate;
a second electrode facing the first electrode and disposed on a surface of the second substrate;
a first electrochromic layer on the surface of the first electrode; a second electrochromic layer facing the first electrochromic layer and disposed on the surface of the second electrode; and
an electrolyte layer between the first and second electrochromic layers,
wherein light scattering particles are dispersed in at least one selected from the group consisting of the first and second electrochromic layers, and the electrolyte layer.

2. The electrochromic device of claim 1 , wherein each of the scattering particles includes at least one selected from the group consisting of silicon oxide (SiO 2 ), silicon nitride (Si 3 N 4 ), aluminum oxide (Al 2 O 3 ), titanium oxide (TiO 2 ), and tin oxide (SnO 2 ).

3. The electrochromic device of claim 1 , wherein each of the scattering particles has a size of 200 nm to 1000 nm.

4. The electrochromic device of claim 1 , further comprising an additional layer between the first electrochromic layer and the electrolyte layer, or between the second electrochromic layer and the electrolyte layer,
wherein the scattering particles are dispersed in at least one selected from the group consisting of the first and second electrochromic layers, the electrolyte layer, and the additional layer.

5. The electrochromic device of claim 1 , wherein light is emitted from the rear surface of the second substrate, and the light is scattered by the scattering particles to the first substrate.

6. The electrochromic device of claim 1 , wherein the amount of the scattering particles is regulated according to the difference between the refractive indices of the first and second electrochromic layers and the electrolyte layer, and the refractive index of the scattering particles.

7. The electrochromic device of claim 6 , wherein the amount of the scattering particles is increased when the difference between the refractive indices of the first and second electrochromic layers and the electrolyte layer, and the refractive index of the scattering particles is small.

Assignees

• Electronics & Telecommunications Res Inst

Inventors

• Cho Seong-Mok
• Kim Joo Yeon
• Kim Tae-Youb
• Ryu Hojun
• Ah Chil Seong
• Cheon Sang Hoon
• Kim Yong Hae
• Song Juhee
• Hwang Chi-Sun

Classifications

• G02F2001/1502

  complementary cell · CPC title

• G02F1/1525 Primary

  characterised by a particular ion transporting layer, e.g. electrolyte · CPC title

• G02F2203/03

  scattering · CPC title

• G02F1/157

  Structural association of cells with optical devices, e.g. reflectors or illuminating devices · CPC title