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Flexible electrochromic device and preparation method thereof

An electrochromic layer and electrochromic technology, which is applied in the fields of instruments, nonlinear optics, optics, etc., can solve the problems of affecting the life of the functional layer of electrochromic devices, affecting the life of electrochromic devices, application and promotion limitations, etc. , to achieve the effect of prolonging the actual service life, widening the requirements of the preparation environment and reducing the production cost

Active Publication Date: 2021-08-13
CHINA LUCKY FILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the electrolyte layer of flexible electrochromic devices mainly adopts quasi-solid electrolyte, although it can meet the needs of flexible applications, but because the important component of the quasi-solid electrolyte (lithium salt) has the characteristics of easily absorbing water vapor, the quasi-solid electrolyte is difficult to prepare during the preparation process. During the assembly process of medium and flexible electrochromic devices, it is easy to absorb water vapor, which affects the life of the functional layer of the electrochromic device. In addition, during the cycle, due to the existence of water, it is easy to appear bubbles on the surface of the device. The above two All these aspects seriously affect the service life of electrochromic devices, therefore, the application and promotion of such devices are greatly restricted.

Method used

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  • Flexible electrochromic device and preparation method thereof
  • Flexible electrochromic device and preparation method thereof
  • Flexible electrochromic device and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] 1. The structure of the flexible electrochromic device: refer to the attached figure 1 , including: a first flexible substrate 1, a first conductive layer 2, an electrochromic layer 3, a first buffer medium layer 4-1, a quasi-solid electrolyte layer 5, and a second buffer medium layer 4-2, which are sequentially stacked. , an ion storage layer 6 , a second conductive layer 7 and a second flexible substrate 8 .

[0082] The materials of the first flexible substrate and the second flexible substrate are independently polyethylene terephthalate (PET), with a thickness of 125 μm and a transmittance of 91%.

[0083] Both the first conductive layer and the second conductive layer are tin-doped indium oxide (ITO) prepared by magnetron sputtering, and the resistance is 40Ω / □.

[0084] The electrochromic layer is tungsten oxide (WO) prepared by electron beam evaporation method. 3 ), with a thickness of 450nm.

[0085] Both the first buffer medium layer and the second buffer m...

Embodiment 2

[0097] 1. The structure of the flexible electrochromic device: refer to the attached figure 1 , including: a first flexible substrate 1, a first conductive layer 2, an electrochromic layer 3, a first buffer medium layer 4-1, a quasi-solid electrolyte layer 5, and a second buffer medium layer 4-2, which are sequentially stacked. , an ion storage layer 6 , a second conductive layer 7 and a second flexible substrate 8 .

[0098] Both the first flexible substrate and the second flexible substrate are polyimide (PI) films with a thickness of 100 μm and a transmittance of 89%.

[0099] Both the first conductive layer and the second conductive layer are tin-doped indium oxide (ITO) prepared by magnetron sputtering, and the resistance is less than 35 / □.

[0100] The electrochromic layer is titanium dioxide (TiO 2 ), with a thickness of 500nm.

[0101] The material of the first buffer dielectric layer is zirconia (ZrO 2 ), prepared by electron beam evaporation, with a thickness of ...

Embodiment 3

[0113] 1. The structure and composition of the flexible electrochromic device: including the first flexible substrate, the first conductive layer, the electrochromic layer, the first buffer medium layer, the quasi-solid electrolyte layer, the ion storage layer, the second a conductive layer and a second flexible substrate.

[0114] Both the first flexible substrate and the second flexible substrate are polyethylene naphthalate (PEN), with a thickness of 150 μm and a transmittance of 90%.

[0115] Both the first conductive layer and the second conductive layer are fluorine-doped tin oxide (FTO) prepared by magnetron sputtering, and the resistance is 50Ω / □.

[0116] The electrochromic layer is tungsten oxide (WO) prepared by magnetron sputtering. 3 ), with a thickness of 500nm.

[0117] The material of the first buffer dielectric layer is tantalum pentoxide (Ta 2 o 5 ), prepared by magnetron reactive sputtering method, the thickness is 150nm, the coating speed should be 0.4n...

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Abstract

The invention discloses a flexible electrochromic device and a preparation method thereof. The flexible electrochromic device comprises a first flexible base material, a first conductive layer, an electrochromic layer, a quasi-solid electrolyte layer, an ion storage layer, a second conductive layer and a second flexible base material which are sequentially laminated, and further comprises a buffer dielectric layer arranged on at least one side of the quasi-solid electrolyte layer. According to the flexible electrochromic device, the buffer dielectric layer is arranged on at least one side of the quasi-solid electrolyte layer, and the buffer dielectric layer can adsorb water, so that the influence of water on the flexible electrochromic device in the preparation and use processes of the flexible electrochromic device is prevented, and the quality, damp and heat resistance and other aging properties of the flexible electrochromic device are improved, so that the actual service life of the device is prolonged.

Description

technical field [0001] The invention belongs to the field of electrochromic technology, and in particular relates to a flexible electrochromic device and a preparation method thereof. Background technique [0002] Electrochromism refers to the reversible change of color and transparency caused by the redox reaction of the material through the electrochemical process under the action of an external electric field or current. This change is due to the optical properties of the material in the ultraviolet, visible or near-infrared region (transmittance, reflectivity or absorptivity) caused by a stable and reversible change under the action of an applied electric field. [0003] With the wide application of electrochromic devices, rigid electrochromic devices can no longer meet the actual needs, and the preparation of flexible electrochromic devices with uniformity and excellent performance has become an important research direction for scientific researchers. Flexible electroc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1523G02F1/153G02F1/15
CPCG02F1/1525G02F1/1523G02F1/1533G02F1/15
Inventor 邢爱刘伟峰侯丽新臧美秀刘贤豪黄达王亚丽
Owner CHINA LUCKY FILM CORP
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