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Electrochromic device based on zno nanotubes and its preparation method

An electrochromic device and nanotube technology, which is applied in instruments, nonlinear optics, optics, etc., can solve the problems of easy leakage of devices, low contrast and poor stability of electrochromic devices, and achieve uniform coverage, The effect of improving electrolyte leakage and increasing electron transport speed

Active Publication Date: 2018-07-13
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the preparation of inorganic-organic electrochromic devices in the laboratory is not widespread enough, and the technology is relatively backward
Due to various reasons, the contrast of the prepared electrochromic device is not high enough, the stability is not good, the number of cycles cannot meet the requirements, and thus the purpose of commercialization cannot be achieved.
In addition, since the laboratory electrolyte is usually liquid, it is easy to leak during the device packaging process

Method used

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  • Electrochromic device based on zno nanotubes and its preparation method
  • Electrochromic device based on zno nanotubes and its preparation method
  • Electrochromic device based on zno nanotubes and its preparation method

Examples

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Embodiment 1

[0031] An electrochromic device based on ZnO nanotubes, including a working electrode, a counter electrode and an electrolyte, wherein the working electrode is ITO glass, its surface is covered with a ZnO nanotube array modified by methyl viologen, and the counter electrode is pure ITO glass , the electrolyte is LiClO 4 γ-butyrolactone solution with a concentration of 0.2M.

[0032] The method for preparing an electrochromic device based on ZnO nanotubes includes preparation of a working electrode, preparation of a counter electrode, preparation of an electrolyte, and packaging of an electrochromic device.

[0033] Wherein, the preparation method of working electrode comprises the following steps:

[0034] Put ITO glass (2.8×2cm 2 ) into isopropanol, acetone, absolute ethanol, and deionized water for ultrasonication in turn, each process takes 15 minutes, and after washing, blow dry with a hair dryer and set aside;

[0035] Step 1, the preparation of the ZnO seed layer, tak...

Embodiment 2

[0044] An electrochromic device based on ZnO nanotubes, including a working electrode, a counter electrode and an electrolyte, wherein the working electrode is ITO glass, the surface of which is covered with a ZnO nanotube array modified by methyl viologen, and the counter electrode is a surface covered with ITO glass with NiO film, electrolyte is LiClO 4 γ-butyrolactone solution at a concentration of 0.2M.

[0045] The method for preparing an electrochromic device based on ZnO nanotubes includes preparation of a working electrode, preparation of a counter electrode, preparation of an electrolyte, and packaging of an electrochromic device.

[0046] Wherein, the preparation method of working electrode comprises the following steps:

[0047] Put ITO glass (2.8×2cm 2 ) into isopropanol, acetone, absolute ethanol, and deionized water for ultrasonication in turn, each process takes 15 minutes, and after washing, blow dry with a hair dryer and set aside;

[0048] Step 1, the prep...

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Abstract

The invention discloses an electrochromic device based on ZnO nanotubes and a preparation method thereof. The electrochromic device comprises a working electrode, a counter electrode, and electrolyte, wherein the working electrode is ITO glass and is coated with a methyl viologen modified ZnO nanotube array, and the counter electrode is ITO glass or ITO glass coated with a NiO film. The preparation method comprises the steps of working electrode preparation, counter electrode preparation, electrolyte preparation and electrochromic device packaging. For working electrode preparation, first, a ZnO nanorod array is prepared by a hydrothermal method, then, the ZnO nanorod array is eroded by KOH solution into a nanotube array, and finally, the nanotube array is modified with small molecules of methyl viologen. The electrochromic device of the invention has high stability and obvious color change, and has a great advantage in the aspect of making intelligent discoloring windows, displays, electronic paper and the like.

Description

technical field [0001] The invention belongs to the technical field of electrochromism, and in particular relates to an electrochromic device based on ZnO nanotubes and a preparation method thereof. Background technique [0002] Electrochromism refers to the phenomenon that the optical properties of materials produce stable and reversible changes under the action of an electric field, corresponding to photochromism and thermochromism. Usually, this reversible change is between a colorless transparent state and a colored state, or between two different colors. The research on electrochromism originated in the mid-1980s and attracted the attention of many scientific researchers. Electrochromic devices have the advantages of high contrast, low manufacturing cost, wide operating temperature range, low driving voltage, rich colors, etc., and can be applied to electrochromic smart windows, automotive automatic anti-glare rearview mirrors, electrochromic glasses, electronic Paper...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/15G02F1/155
CPCG02F1/15G02F1/155
Inventor 魏昂李劭阳
Owner NANJING UNIV OF POSTS & TELECOMM
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