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Flexible electrochromic device and preparing method thereof

A color-changing, flexible electricity technology, applied in the direction of instruments, photovoltaic power generation, nonlinear optics, etc., can solve the problems of poor stability, low penetration rate, and low color-changing efficiency of electrochromic devices, and achieve stable cyclic color change and high color-changing efficiency , cost-saving effect

Active Publication Date: 2019-11-12
SHANTOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a flexible electrochromic device and its preparation method to solve the problems of poor stability, low discoloration efficiency and low penetration rate of electrochromic devices

Method used

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  • Flexible electrochromic device and preparing method thereof
  • Flexible electrochromic device and preparing method thereof
  • Flexible electrochromic device and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030]Step 1. Preparation of flexible and stretchable polydimethylsiloxane (PDMS) substrate: PDMS, mesoporous silica nanoparticles and curing agent are placed in a 3cm*5cm plastic box at a ratio of 20:1:2 Mix and stir for 2-5 minutes, then put the mixture in a vacuum drying oven to ventilate and dry until no bubbles can be seen, put it on a heating plate and cure it at 80°C for 2 hours to prepare a PDMS substrate with uniform thickness. The particle size of mesoporous silica is 7-40nm.

[0031] Step 2. Put the PDMS substrate into a magnetron sputtering target coating machine, and use plasma to clean and activate the PDMS surface.

[0032] Step 3. At 200W RF power, Ar / O 2 The flow rate is 20sccm, the proportion of oxygen is 80%, and the working pressure is 2.9mTorr. The pure tungsten target is sputtered by radio frequency magnetron sputtering, and WO with a thickness of 50nm is deposited on the surface of PDMS. 3 layer.

[0033] Step 4. Under the parameters of DC power 60W, ...

Embodiment 2

[0040] Step 1. Preparation of flexible and stretchable polydimethylsiloxane (PDMS) substrate: PDMS, mesoporous silica nanoparticles and curing agent are placed in a 3cm*5cm plastic box at a ratio of 20:0.5:2 Mix and stir for 2-5 minutes, then put the mixture in a vacuum drying oven to exhaust and dry until no bubbles can be seen, put it on a heating plate and cure it at 70°C for 1 hour to prepare a PDMS substrate with uniform thickness. The particle size of mesoporous silica is 7-40nm.

[0041] Step 2. Put the PDMS substrate into a magnetron sputtering target coating machine, and use plasma to clean and activate the PDMS surface.

[0042] Step 3. At 120W RF power, Ar / O 2 The flow rate is 20sccm, the proportion of oxygen is 20%, and the working pressure is 2.9mTorr. The pure molybdenum target is sputtered by radio frequency magnetron sputtering, and MoO with a thickness of 60nm is deposited on the surface of PDMS. 3 layer.

[0043] Step 4. Under the parameters of DC power 60...

Embodiment 3

[0050] Step 1. Preparation of flexible and stretchable polydimethylsiloxane (PDMS) substrate: PDMS, mesoporous silica nanoparticles and curing agent are placed in a 3cm*5cm plastic box at a ratio of 100:1:10 Mix and stir for 2-5 minutes, then put the mixture in a vacuum drying oven to ventilate and dry until no bubbles can be seen, put it on a heating plate and cure it at 90°C for 2 hours to prepare a PDMS substrate with uniform thickness. The particle size of mesoporous silica is 7-40nm.

[0051] Step 2. Put the PDMS substrate into a magnetron sputtering target coating machine, and use plasma to clean and activate the PDMS surface.

[0052] Step 3. At 150W RF power, Ar / O 2 The flow rate is 20sccm, the proportion of oxygen is 50%, and the operating pressure is 2.9mTorr. The pure nickel target is sputtered by radio frequency magnetron sputtering, and a NiO layer with a thickness of 30nm is deposited on the PDMS surface.

[0053] Step 4. Under the parameters of DC power 60W, A...

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Abstract

The present invention relates to a flexible electrochromic device and a preparing method thereof. The preparing method mainly comprises: preparing a flexible extensible PDMS substrate, preparing a PDMS coated with a Dielectric-Metal-Dielectric structure, preparing a TCO-coated PDMS counter electrode, preparing a solid / gel electrolyte; and finally, using a silk screen printing method to print the solid / gel electrolyte onto the PDMS coated with the Dielectric-Metal-Dielectric structure, after the solid / gel electrolyte is cured and formed, placing the TCO-coated PDMS counter electrode onto the solid / gel electrolyte, and performing sealing processing around by using PVB rubber, to form ECDs of a pattern array structure. The flexible electrochromic device provided in the present invention is divided into a flexible substrate, a solid / gel electrolyte layer, an electrochromic layer of a DMD structure, and a transparent conductive layer, so that a plurality of times of circular electrochromismcan be performed, circular electrochromism is more stable, electrochromism efficiency is higher, and the device is flexible. The preparing method is simple, efficient, and low in costs, and can fastimplement industrial production. The flexible electrochromic device and the preparing method thereof are applied to an aspect of car and building intelligence systems, and can reduce energy consumed by cities and achieve an objective of energy conservation.

Description

technical field [0001] The invention relates to the technical field of flexible electronics, in particular to a flexible electrochromic device and a preparation method thereof. Background technique [0002] In recent years, with the rise of electronic information technology, especially the rise of flexible electronic devices. Flexible electronic devices have broad application prospects in information, energy, medical, national defense and other fields due to their unique flexibility / ductility and high-efficiency and low-cost manufacturing processes. The industrial and academic circles of various countries have invested heavily in the research and development of flexible functional devices, so there is an urgent need for the next generation of electrochromic electronic products to have the characteristics of flexibility, uniformity and stretchability. For example, the production of e-paper and e-books requires flexible displays that allow them to be folded like ordinary pape...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/153G02F1/1516C23C14/35C23C14/18C23C14/08
CPCC23C14/35C23C14/08C23C14/185G02F1/15165G02F1/1533Y02E10/542
Inventor 徐从康吕凯王江涌
Owner SHANTOU UNIV
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