A kind of flexible electrochromic device and preparation method thereof
An electrochromic layer, an electrochromic technology, applied in instruments, nonlinear optics, optics, etc., which can solve problems such as apparent bubbles, affecting device stability, and easy absorption of water vapor by lithium salts
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Embodiment 1
[0059] The first step is to prepare the transparent front electrode layer
[0060] Using PET as the material of the first flexible transparent substrate, the PET was cleaned, followed by ultrasonic cleaning for 10 min with detergent, deionized water, absolute ethanol, acetone, and isopropanol, respectively, and then dried with nitrogen. Using magnetron sputtering method, a transparent front electrode layer is plated on the surface of the first flexible transparent substrate. The material for forming the transparent front electrode layer is ITO, the thickness of the transparent front electrode layer is 280nm, and the square resistance is 27Ω / □. The visible light transmittance was 83.5%.
[0061] The second step is to prepare the electrochromic layer
[0062] Preparation of electrochromic layer: using tungsten oxide as the target, an electrochromic layer with a thickness of 260 nm was formed on the surface of the transparent front electrode layer by electron beam evaporation. ...
Embodiment 2
[0075] The flexible electrochromic device was prepared with reference to the method of Example 1, and the difference from Example 1 was:
[0076] The third step is to prepare the quasi-solid electrolyte layer
[0077] The lithium salt was dissolved in the dispersant, and PVDF resin and other additives were added for continuous stirring for 6 h to obtain an initial quasi-solid electrolyte with a viscosity of 960 mPa·s. Then, the electrolyte solution was coated on the first release layer by means of blade coating at a temperature of 25° C. and a humidity of 20% RH. After removing the organic solvent by drying at 70° C., it was placed in a drying room with a relative humidity of 7% RH and a temperature of 13° C. for a equilibration time of 17 hours to obtain a quasi-solid electrolyte layer.
[0078] The fourth step is to prepare the first barrier layer and the second barrier layer
[0079] On the surface of the quasi-solid electrolyte layer away from the first release layer, th...
Embodiment 3
[0081] The flexible electrochromic device was prepared with reference to the method of Example 1, and the difference from Example 1 was:
[0082] The third step is to prepare the quasi-solid electrolyte layer
[0083] The lithium salt was dissolved in the dispersant, and PMMA resin and other additives were added and stirred continuously for 6 h to obtain an initial quasi-solid electrolyte with a viscosity of 1050 mPa·s. Then, the electrolyte solution is coated on the first release layer by means of blade coating at a temperature of 25° C. and a humidity of 20% RH. After removing the organic solvent by drying at 80°C, it was placed in a drying room with a relative humidity of 10% RH and a temperature of 20°C for 24 hours of equilibration to obtain a quasi-solid electrolyte layer.
[0084] The fourth step is to prepare the first barrier layer and the second barrier layer
[0085] On the surface of the quasi-solid electrolyte layer far from the first release layer, the method o...
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Abstract
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