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Method for preparing inorganic/organic composite electrochromic film

An electrochromic and inorganic composite technology, applied in the field of preparation of inorganic composite organic electrochromic thin films, can solve the problems of poor stability, long response time, short response time, etc., and achieve the effect of improving stability, life, and superior performance

Inactive Publication Date: 2010-11-24
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The light absorption change of inorganic electrochromic materials is caused by the double injection / extraction of ions and electrons. Its performance is superior and stable, but the color is relatively single and the response time is long.
The light absorption change of organic electrochromic materials comes from oxidation-reduction reactions. Its response time is short (up to femtosecond level), rich in color, high in contrast, easy to carry out molecular design, and it can maintain the color changing effect after power off, and has a memory effect. However, its stability is poor and its life is short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing an inorganic composite organic electrochromic film, comprising the following steps:

[0022] 1) Dissolve 192.14g (1mol) of citric acid in 200ml of ammonia water with a volume concentration of 25% to form solution A;

[0023] Dissolve 122.56g (0.67mol) of tungsten powder in 200ml of hydrogen peroxide solution with a volume concentration of 30% to form solution B;

[0024] 2) According to the molar ratio of tungsten powder and citric acid as 1:1.5, fully mix solution A and solution B, then add 200ml of absolute ethanol and 96.07g of polyethylene glycol, stir and dissolve to form a precursor;

[0025] 3) Evaporate the precursor in a water bath at 80°C until a wet gel is obtained, then dry and foam the wet gel at 130°C to obtain a xerogel, and then calcine the xerogel at a constant temperature of 400°C for 5 hours Take it out and get Nano WO 3 Powder;

[0026] 4) Add Nano WO 3 The powder is ultrasonically dispersed in a hydrochloric acid solution ...

Embodiment 2

[0030] A method for preparing an inorganic composite organic electrochromic film, comprising the following steps:

[0031] 1) Dissolve 192.14g (1mol) of citric acid in 200ml of ammonia water with a volume concentration of 25% to form solution A;

[0032] Dissolve 73.54g (0.4mol) of tungsten powder in 200ml of hydrogen peroxide solution with a volume concentration of 30% to form solution B;

[0033] 2) According to the molar ratio of tungsten powder and citric acid as 1:2.5, fully mix solution A and solution B, then add 200ml of absolute ethanol and 64.05g of polyethylene glycol, stir and dissolve to form a precursor;

[0034] 3) Evaporate the precursor in a water bath at 90°C until a wet gel is obtained, then dry and foam the wet gel at 140°C to obtain a xerogel, and then calcine the xerogel at a constant temperature at 500°C for 3 hours Take it out and get Nano WO 3 Powder;

[0035] 4) Add Nano WO 3 The powder is ultrasonically dispersed in a hydrochloric acid solution co...

Embodiment 3

[0038] A method for preparing an inorganic composite organic electrochromic film, comprising the following steps:

[0039] 1) Dissolve 192.14g (1mol) of citric acid in 200ml of ammonia water with a volume concentration of 25% to form solution A;

[0040] Dissolve 91.925g (0.5mol) of tungsten powder in 200ml of hydrogen peroxide solution with a volume concentration of 30% to form solution B;

[0041] 2) According to the molar ratio of tungsten powder and citric acid as 1:2, fully mix solution A and solution B, then add 100ml of absolute ethanol and 80g of polyethylene glycol, stir and dissolve to form a precursor;

[0042] 3) Evaporate the precursor in a water bath at 85°C until a wet gel is obtained, then dry and foam the wet gel at 135°C to obtain a xerogel, and then calcine the xerogel at a constant temperature of 450°C for 4 hours Take it out and get Nano WO 3 Powder;

[0043] 4) Add Nano WO 3 The powder is ultrasonically dispersed in a hydrochloric acid solution contai...

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PUM

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Abstract

The invention discloses a method for preparing an inorganic / organic composite electrochromic film. The prepared organic film is an aniline / o-phenylenediamine film, and inorganic adulterants are WO3 nano-particles. The method comprises the following steps: preparing a precursor from tungsten powder, citric acid and polyethylene glycol; and carrying out gelatinization, drying and calcination on the precursor to obtain nano WO3 powder; ultrasonically dispersing the WO3 powder in acidic aqueous solution, and adding aniline and o-phenylenediamine; stirring to dissolve the aniline and o-phenylenediamine, immersing processed ITO glass into the solution, and adding oxidants; and pulling to form a film, and drying the film at normal temperature to obtain the WO3 doped organic electrochromic film material.

Description

technical field [0001] The invention belongs to the technical field of electrochromic thin film materials, and relates to a preparation method of an inorganic composite organic electrochromic thin film. Background technique [0002] Electrochromism refers to a stable and reversible change in the color or transparency of a material under the action of an applied voltage or electric field. Electrochromic films have the advantages of low operating voltage, low energy consumption, environmental protection, large vision, memory function, wide working range, and easy large-area production. They have broad application prospects in the fields of display devices, dimming glass, and information storage. . [0003] Electrochromic films can be divided into inorganic electrochromic films (such as WO 3 , NiO 2 、MoO 3 , V 2 o 5 etc.) and organic electrochromic films. The light absorption change of inorganic electrochromic materials is caused by the double injection / extraction of ion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C17/00
Inventor 王秀峰伍媛婷
Owner SHAANXI UNIV OF SCI & TECH
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