阅读说明：本技术 一种快速响应的全固态电致变色器件及其制备方法 (all-solid-state electrochromic devices with quick response and preparation method thereof ) 是由 赵九蓬 李文杰 张翔 陈曦 赵英明 于 2019-10-30 设计创作，主要内容包括：一种快速响应的全固态电致变色器件及其制备方法,它涉及一种电致变色器件及其制备方法。本发明的目的是要解决现有电致变色器件的制备效率低,响应速度慢的问题。一种快速响应的全固态电致变色器件由基底、底电极层、电致变色层、互补变色层、锂层和顶电极层组成。方法：采用真空镀膜法、磁控溅射法、真空热蒸镀法或电子束蒸镀法在基底上沉积底电极层、电致变色层、互补变色层、锂层和顶电极层。本发明制备的快速响应的全固态电致变色器件响应时间小于5秒。本发明可获得一种快速响应的全固态电致变色器件。(fast-response all-solid-state electrochromic devices and a preparation method thereof, which relate to electrochromic devices and a preparation method thereof, the invention aims to solve the problems of low preparation efficiency and low response speed of the existing electrochromic devices. fast-response all-solid-state electrochromic devices comprise a substrate, a bottom electrode layer, an electrochromic layer, a complementary electrochromic layer, a lithium layer and a top electrode layer.)

The fast-response all-solid-state electrochromic device is characterized in that fast-response all-solid-state electrochromic devices comprise a substrate, a bottom electrode layer, an electrochromic layer, a complementary color-changing layer, a lithium layer and a top electrode layer, wherein the bottom electrode layer, the electrochromic layer, the complementary color-changing layer and the top electrode layer are sequentially arranged on the substrate from bottom to top or the bottom electrode layer, the complementary color-changing layer, the electrochromic layer and the top electrode layer are sequentially arranged on the substrate from bottom to top, and the lithium layer is distributed in the electrochromic layer and the complementary color-changing layer.

2. The kinds of fast-response all-solid-state electrochromic devices according to claim 1, wherein the substrate is a heat-resistant substrate or a flexible substrate, the heat-resistant substrate is glass, and the flexible substrate is polyethylene terephthalate or polydimethylsiloxane.

3. The fast response all-solid-state electrochromic device according to claim 1, wherein the bottom electrode layer is an indium tin oxide layer, a fluorine-doped tin oxide layer or a metal layer, and the metal is silver, gold or platinum.

4. The kinds of fast-response all-solid-state electrochromic devices according to claim 1, wherein the electrochromic layer is a tungsten oxide layer or a vanadium oxide layer, and the tungsten oxide has a tungsten-to-oxygen ratio of 1 (1-3).

5. The kinds of fast-response all-solid-state electrochromic devices according to claim 1, wherein the complementary discoloration layers are a nickel oxide layer, a vanadium oxide layer, a tantalum oxide layer, a titanium oxide layer, a cobalt oxide layer, a zirconium oxide layer, an yttrium oxide layer and a nickel tungsten oxide layer, and the doping amount of tungsten in the nickel tungsten oxide layer is 1% -50%.

6. The fast response all-solid-state electrochromic device according to claim 1, wherein the top electrode layer is an indium tin oxide layer, a fluorine-doped tin oxide layer or a metal layer, and the metal is silver, gold or platinum.

7. The fast response all-solid-state electrochromic device according to claim 1, wherein the bottom electrode layer has a thickness of 2 nm-600 nm and a resistance of 1 Ω -10000 Ω, the electrochromic layer has a thickness of 10 nm-800 nm, the complementary electrochromic layer has a thickness of 10 nm-800 nm, and the top electrode layer has a thickness of 2 nm-600 nm and a resistance of 1 Ω -10000 Ω.

8. The method for preparing fast response all-solid-state electrochromic devices as claimed in any of claims 1 to 7, wherein the preparation method of fast response all-solid-state electrochromic devices is completed by the following steps:

, which adopts the following four methods to prepare the fast response all-solid-state electrochromic device:

method comprises sequentially depositing a bottom electrode layer, an electrochromic layer, a complementary electrochromic layer, a lithium layer and a top electrode layer on a substrate by vacuum coating, magnetron sputtering, vacuum thermal evaporation or electron beam evaporation;

the second method comprises the following steps: sequentially depositing a bottom electrode layer, an electrochromic layer, a lithium layer, a complementary electrochromic layer and a top electrode layer on a substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method;

the third method comprises the following steps: sequentially depositing a bottom electrode layer, a complementary color changing layer, an electrochromic layer, a lithium layer and a top electrode layer on a substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method;

the method four comprises the following steps: and sequentially depositing a bottom electrode layer, a complementary color changing layer, a lithium layer, an electrochromic layer and a top electrode layer on the substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method.

9. The fast response all-solid-state electrochromic device preparation method according to claim 8, wherein the deposition rate of the bottom electrode layer is 0.01 nm/s-100 nm/s, the deposition rate of the top electrode layer is 0.01 nm/s-100 nm/s, the deposition rate of the electrochromic layer is 0.01 nm/s-100 nm/s, the deposition rate of the complementary electrochromic layer is 0.01 nm/s-100 nm/s, the deposition rate of the lithium layer is 0.01 nm/s-100 nm/s, and the deposition time of the lithium layer is 2 min-60 min.

10. The method of claim 8, wherein the substrate is a heat-resistant substrate, and the heat treatment is performed in vacuum, atmospheric atmosphere or inert gas atmosphere at a temperature of 10-600 deg.C for 10-400 min, wherein the inert gas is argon or nitrogen.

Technical Field

The invention relates to electrochromic devices and a preparation method thereof.

Background

The electrochromic materials are various in types and mainly divided into organic electrochromic materials such as conducting polymers, organic micromolecular dyes and the like and inorganic electrochromic materials such as transition metal oxides, metal coordination complexes and the like, and the electrochromic materials have -wide application potential in the fields of intelligent windows, anti-dazzling rearview mirrors, aerospace thermal control, aircraft windows and the like.

The traditional all-solid-state electrochromic device generally comprises a five-layer structure of a bottom electrode layer, an electrochromic layer, an electrolyte layer or an ion conducting layer, an ion storage layer or a complementary electrochromic layer and a top electrode layer, at present, lithium-containing inorganic salt is generally adopted for providing color-changing ions for the electrolyte layer of the electrochromic device, but the electrolyte layer reduces the preparation efficiency in the aspect of , in addition, in the aspect of , the internal resistance of the whole device is larger, the ion transmission efficiency is reduced, and the response speed of the device is reduced.

Disclosure of Invention

The invention aims to solve the problems of low preparation efficiency and low response speed of the conventional electrochromic device, and provides all-solid-state electrochromic devices with quick response and a preparation method thereof.

The fast-response all-solid-state electrochromic device comprises a substrate, a bottom electrode layer, an electrochromic layer, a complementary color-changing layer, a lithium layer and a top electrode layer, wherein the bottom electrode layer, the electrochromic layer, the complementary color-changing layer and the top electrode layer are sequentially arranged on the substrate from bottom to top or the bottom electrode layer, the complementary color-changing layer, the electrochromic layer and the top electrode layer are sequentially arranged on the substrate from bottom to top, and the lithium layer is distributed in the electrochromic layer and the complementary color-changing layer.

The preparation method of kinds of fast-response all-solid-state electrochromic devices is completed according to the following steps:

, which adopts the following four methods to prepare the fast response all-solid-state electrochromic device:

method comprises sequentially depositing a bottom electrode layer, an electrochromic layer, a complementary electrochromic layer, a lithium layer and a top electrode layer on a substrate by vacuum coating, magnetron sputtering, vacuum thermal evaporation or electron beam evaporation;

the second method comprises the following steps: sequentially depositing a bottom electrode layer, an electrochromic layer, a lithium layer, a complementary electrochromic layer and a top electrode layer on a substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method;

the third method comprises the following steps: sequentially depositing a bottom electrode layer, a complementary color changing layer, an electrochromic layer, a lithium layer and a top electrode layer on a substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method;

the method four comprises the following steps: and sequentially depositing a bottom electrode layer, a complementary color changing layer, a lithium layer, an electrochromic layer and a top electrode layer on the substrate by adopting a vacuum coating method, a magnetron sputtering method, a vacuum thermal evaporation method or an electron beam evaporation method.

The principle and the advantages of the invention are as follows:

, novel fast-response all-solid-state electrochromic device structures can be obtained, the structures comprise four layers of structures, namely a bottom electrode layer, an electrochromic layer, a complementary electrochromic layer and a top electrode layer, and color-changing ions are introduced by directly sputtering or evaporating metal lithium, and lithium diffuses into the electrochromic layer and the complementary electrochromic layer in the preparation process and does not exist independently due to small lithium atom radius;

secondly, the fast-response all-solid-state electrochromic devices prepared by the method can realize color change by applying voltage after the preparation is finished, and can also carry out heat treatment to optimize the color change function, wherein the heat treatment is carried out in vacuum, atmospheric atmosphere or inert gas atmosphere;

and thirdly, the fast-response all-solid-state electrochromic devices do not need an intermediate electrolyte layer or an ion conducting layer, so that the production cost can be reduced, the preparation efficiency can be improved, and the internal impedance of the devices can be reduced, therefore, the performance of the devices is superior to that of electrochromic devices with electrolyte layer or ion conducting layer structures, and the response time is less than 5 seconds.

The present invention can obtain kinds of fast response all-solid electrochromic devices.

Drawings

FIG. 1 is a cross-sectional SEM image of fast response all-solid-state electrochromic devices prepared in example ;

fig. 2 is a graph of the response times of fast responding all-solid-state electrochromic devices prepared in example .

Detailed Description