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Preparation method for multi-state electrochromic device

A technology of electrochromic devices and conductive layers, which is applied in the fields of instruments, optics, nonlinear optics, etc., and can solve the problems of unfavorable practical application in industrial fields, high cost of nano-indium tin oxide, etc.

Inactive Publication Date: 2014-10-01
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Traditional electrodeposition methods can only endow electrochromic devices with transparent or light-colored and mirror states, and it is difficult to achieve a black state with strong light absorption properties. Although there have been reports in the literature (Electrochemical Optical-Modulation Device with Reversible Transformation Between Transparent, Mirror, and Black—Adv.Matter.2012, 24, OP122) can achieve black state, but the cost of nano-indium tin oxide (ITO) particle dispersion used in it is very high, which is not conducive to large-scale practical application and Promotion and utilization in the industrial field

Method used

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  • Preparation method for multi-state electrochromic device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1: Weigh 85mg (0.5mmol) of AgNO 3 , 806mg (2.5mmol) of tetrabutylammonium bromide (TBABr), 13mg (0.1mmol) of CuCl 2 , it was dissolved in 10mL of DMSO, and magnetically stirred until the solute was completely dissolved;

[0024] Step 2: Select two pieces of FTO glass with a size of 3cm×2.5cm as electrodes, soak them in deionized water and ethanol in turn, and clean them 5 times with an ultrasonic cleaner, and then dry them at 80°C ,spare;

[0025] Step 3: Take a PTFE plate with a size of 2.5cm×2.5cm and a thickness of 5mm, dig a 2cm×2cm through hole in the middle, and then rinse the PTFE with deionized water and absolute ethanol respectively plate 4 times, and then dried at 60°C for later use;

[0026] Step 4: Weigh 0.5g of TiO 2 Nanoparticles, the particle size is 20nm, dissolved in 10mL of absolute ethanol (purity ≥ 99.7%), ultrasonic vibration for 30min, until TiO 2 Evenly dispersed in the solution. Take any piece of FTO glass in step 2, cover the short si...

Embodiment 2

[0030] Step 1: Weigh 127.5mg (1mmol) of AgNO 3 , 1612mg (5mmol) of tetrabutylammonium bromide (TBABr), 26mg (0.2mmol) of CuCl 2 , it was dissolved in 20mL of DMSO, and magnetically stirred until the solution was completely dissolved;

[0031] Step 2: Select two pieces of FTO glass with a size of 5.5cm×5cm as electrodes, soak them in deionized water and ethanol in turn, and clean them 5 times with an ultrasonic cleaner. After cleaning, dry at 80°C and set aside;

[0032] Step 3: Take a PTFE plate with a size of 5cm×5cm and a thickness of 5mm, dig a 4.5cm×4.5cm through hole in the middle, and then rinse the PTFE with deionized water and absolute ethanol respectively plate 4 times, and then dried at 60°C for later use;

[0033] Step 4: Weigh 1g of TiO 2 Nanoparticles, the particle size is 150nm, dissolved in 20mL of absolute ethanol (purity ≥ 99.7%), ultrasonic vibration for 30min, until TiO 2 Evenly disperse in the solution, take any piece of FTO glass in step 2, cover a la...

Embodiment 3

[0037] Step 1: Weigh 255mg (2mmol) of AgNO 3 , 3224mg (10mmol) of tetrabutylammonium bromide (TBABr), 52mg (0.4mmol) of CuCl 2 , was dissolved in 40 mL of DMSO, and magnetically stirred until the solute was completely dissolved.

[0038] Step 2: Select two pieces of FTO glass with a size of 10.5cm×10cm as electrodes, soak them in deionized water and ethanol in turn, clean them with an ultrasonic cleaner for 5 times, and dry them at 80°C after cleaning ,spare;

[0039] Step 3: Take a PTFE plate with a size of 10cm×10cm and a thickness of 5mm, dig a 9.5cm×9.5cm through hole in the middle, and then rinse the PTFE with deionized water and absolute ethanol respectively plate 4 times and then dried at 60°C for later use;

[0040] Step 4: Weigh 1g of TiO 2 Nanoparticles, the particle size is 50nm, dissolved in 20mL of absolute ethanol (purity ≥ 99.7%), ultrasonic vibration for 30min, until TiO 2 Evenly disperse in the solution, take any piece of FTO glass in step 2, cover a laye...

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Abstract

The invention relates to a preparation method for a multi-state electrochromic device, which belongs to the technical field of functional materials and devices. The preparation method comprises the following specific steps: 1) preparing electrolyte solution; 2) cutting two transparent conductive substances and a polytetrafluoroethylene plate with the width which is equal to the width of the transparent conductive substances, the length which is 3-7mm less than the length of the transparent conductive substances, and the thickness of 0.3-0.7mm, forming a square through hole in the middle of the polytetrafluoroethylene plate, the distance from the edge of the through hole to the edge of the corresponding polytetrafluoroethylene plate being 3-7 mm, washing and drying for the future use; 3) spin-coating a base metal oxide nano-particle dispersion liquid on one substrate conductive layer, and then sintering; 4) bonding the polytetrafluoroethylene plate on the substrate conductive layers which are not spin-coated, pouring the electrolyte solution in the through hole, then bonding the spin-coated substrate conductive layers towards the through hole, two substrates being staggered at a distance of 3-7mm in a long side direction and completely covering the polytetrafluoroethylene plate, and finally encapsulating by epoxy resin. The electrochromic device prepared by the preparation method disclosed by the invention is capable of realizing transparent, mirror-surface and black three-colour-state reversible conversion.

Description

technical field [0001] The invention relates to the preparation of a multi-state electrochromic device, belonging to the technical field of functional materials and devices. Background technique [0002] The electrochromic phenomenon of materials refers to the phenomenon that some materials undergo redox reactions under the action of an applied potential, resulting in reversible changes in their transmittance or reflectance to light. Since Deb used WO in 1969 3 Since the world's first electrochromic device (ECD) was prepared by thin film, electrochromic devices based on various material systems and different structures have been continuously designed. As far as their systems are concerned, they are mainly divided into the following three categories: first The class is to inject or extract ions (mainly Li + 、H + ) to achieve discoloration, such as transition metal oxide WO 3 , NiO, V 2 o 5 、MoO 3 etc. (Crystalline WO 3 Nanoparticles for Highly Improved Electrochromic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/15C03C17/23
Inventor 吴刚向勇叶涛胡琮瑾
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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