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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, and provides a method for preparing a flexible and stickable electrochromic device that can be transformed between a mirror state and a transparent state

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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specific Embodiment approach 1

[0022] Specific Embodiment 1: In this embodiment, the preparation method of the flexible and stickable electrochromic device that can be transformed between the mirror state and the transparent state is carried out according to the following steps:

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

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

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

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in that: the mass fraction of calcium hydride in dimethyl sulfoxide in step 2 is 0.4% to 1%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific embodiment 3: This embodiment differs from specific embodiment 1 or 2 in that: the dimethyl sulfoxide obtained after drying under reduced pressure is put into molecular sieves for sealed storage. Others are the same as in 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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