Method for preparing flexible adhesive electrochromic device capable of being switched between mirror state and transparent state

An electrochromic device and mutual conversion technology, which can be used in instruments, nonlinear optics, optics, etc., can solve the problems of complex preparation, high cost, fragile electrochromic smart windows, etc., and achieve a simple preparation method, easy operation, The effect of low processing cost

Active Publication Date: 2015-05-13
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the problems of fragility, complicated preparation and high cost of existing electrochromic smart windows, a

Method used

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  • Method for preparing flexible adhesive electrochromic device capable of being switched between mirror state and transparent state

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Example Embodiment

[0022] Specific implementation mode 1: In this embodiment, the method for preparing a flexible pasteable electrochromic device that can be converted into a mirror state and a transparent state is carried out in the following steps:

[0023] 1. Cut the ITO / PET film as needed, and then ultrasonically clean it in acetone, methanol and ultrapure water in sequence, with a cleaning time of 10-20 minutes, and then dry it with nitrogen to obtain a flexible substrate;

[0024] 2. Add calcium hydride to dimethyl sulfoxide, heat to reflux for 6-8 hours, and distill under reduced pressure under nitrogen to obtain dry dimethyl sulfoxide, which is protected and sealed under nitrogen;

[0025] 3. Dissolve silver nitrate, copper chloride and tetra-n-butylammonium bromide in the dried dimethyl sulfoxide obtained in step 2 to prepare an electrolyte. The concentration of silver nitrate in the electrolyte is 10-100 mM, and copper chloride The concentration of tetrabutylammonium bromide is 5-10mM, the co...

Example Embodiment

[0029] Specific embodiment two: this embodiment is different from specific embodiment one in that the mass fraction of calcium hydride in the dimethyl sulfoxide described in step two is 0.4% to 1%. Others are the same as the first embodiment.

Example Embodiment

[0030] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the dimethyl sulfoxide obtained after drying under reduced pressure is put into a molecular sieve for sealed storage. Others are the same as the first or second embodiment.

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Abstract

The invention relates to a method for preparing an electrochromic device, in particular to a method for preparing a flexible adhesive electrochromic device capable of being switched between a mirror state and a transparent state and aims to solve the problems that the traditional electrochromic smart window is fragile, complex in preparation and higher in cost. The method comprises the following steps: 1, cutting ITO/PET films as required, performing ultrasonic cleaning and blow-drying, and thus obtaining flexible substrates; 2, adding calcium hydride into dimethyl sulfoxide, carrying out heating reflux and distillation at reduced pressure, and thus obtaining dried dimethyl sulfoxide; 3, dissolving silver nitrate, copper chloride and tetrabutyl ammonium bromide into the dried dimethyl sulfoxide to be prepared into an electrolyte, adding polyethylene glycol into the electrolyte, and thus obtaining an electrolyte solution; 4, oppositely placing the conductive surfaces of the two flexible substrates, injecting the electrolyte solution between the two flexible substrates, packaging, and thus obtaining the electrochromic device. The electrochromic device can be switched between the mirror state and the transparent state and is flexible. The method is applied to the field of the electrochromic smart windows.

Description

technical field [0001] The invention relates to a preparation method of an electrochromic device. Background technique [0002] The electrochromic smart window can change its own color according to people's needs and then intelligently adjust the solar radiation energy, thereby reducing indoor temperature control energy consumption. At this stage, most of the electrochromic smart windows mainly rely on the discoloration of metal oxides, such as WO 3 , NiO, MoO 3 , V 2 o 5 etc., using the intercalation / extraction of small-radius ions (H+, Li+, etc.) to achieve coloring / fading of color-changing substances. The realization of this type of smart window requires the use of large precision instruments such as magnetron sputtering to continuously sputter and grow multi-layer films on transparent substrates such as glass, such as transparent conductive layers, electrochromic layers, ion-conducting layers, counter electrode layers, etc. . This type of smart window is highly dep...

Claims

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Application Information

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IPC IPC(8): G02F1/15
CPCG02F1/1333G02F1/15
Inventor 李垚侯帅李娜赵九蓬张翔
Owner HARBIN INST OF TECH
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