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Electrochromic photonic crystal film and preparation method and application thereof

A photonic crystal and electrochromic technology, applied in applications, electronic equipment, and other household appliances, can solve the problem of not being able to further display colors

Active Publication Date: 2021-07-13
PHOMERA METAMATERIALS INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The color rendering principle of photonic crystal thin films is that the light is modulated by Bragg diffraction of periodic structures, and the corresponding structural color can be obtained by reflecting, refracting and diffracting the light of photonic crystal itself; that is, the characteristics of the periodic structure of photonic crystals can change the angle of incident light There are different extensions corresponding to the viewing angle, so when observing the photonic crystal film, the change of different colors of the photonic crystal can be observed with different viewing angles. Although the current photonic crystal film can achieve multi-color changes, it can only display The color that can be displayed by itself cannot further display richer colors

Method used

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  • Electrochromic photonic crystal film and preparation method and application thereof

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Embodiment 1

[0024] The electrochromic photonic crystal film in Example 1 includes a periodic array of nano-microspheres, and viologen compounds are filled between the nano-microspheres in the array, and the viologen compounds are 1,1'-diethyl-4, 4'-bipyridine;

[0025] The preparation method of the electrochromic photonic crystal thin film comprises the following steps:

[0026] S1. Prepare a polymer nanosphere emulsion with a solid content of 10% to 50%;

[0027] S2, drying the polymer nanosphere emulsion to obtain nanosphere aggregates, wherein the specific preparation process of step S1 and step S2 can refer to the nanosphere described in (1) in Example 1 of Chinese invention patent application CN105949379A preparation;

[0028] S3. Preparation of viologen compounds: dissolve 4,4'-bipyridine in a solvent to obtain a mixed solution, add soluble salts to the mixed solution, and react to obtain viologen compounds. For the preparation process, please refer to September 2008. "Preparatio...

Embodiment 2

[0033] The preparation method of the photonic crystal thin film in Example 2 is basically the same, except that at least one of the substituents on both sides of the viologen compound has a cyano group (-C≡N).

[0034] The photonic crystal thin film in embodiment 2 is energized, and the energization conditions are the same as those in embodiment 1.

Embodiment 3

[0036] The preparation method of the photonic crystal thin film in embodiment 3 is roughly the same, and the difference is: the counterion in the viologen compound is composed of Br - replaced by PF 6 - .

[0037] The photonic crystal thin film in embodiment 3 is energized, and the energization conditions are the same as those in embodiment 1.

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Abstract

The invention provides an electrochromic photonic crystal film as well as a preparation method and application thereof. The preparation method of the electrochromic photonic crystal film comprises the following steps: S1, preparing a polymer nano-microsphere emulsion; S2, drying the emulsion to obtain nanometer microsphere aggregate; S3, uniformly dispersing the nanometer microsphere aggregate into a viologen compound solution to form gel, applying the gel between an upper ITO-PET base material and a lower ITO-PET base material to form a sandwich structure, and performing rolling treatment to obtain a composite film material; and S4, enabling the composite film material to pass through oscillation shearing and normalizing equipment so as to obtain the photonic crystal film with the nanometer microspheres in three-dimensional ordered arrangement between the upper ITO-PET base material layer and the lower ITO-PET base material layer. The prepared electrochromic photonic crystal film comprises a nanometer microsphere periodic array, and the nanometer microspheres in the array are filled with organic viologen compounds having reversible electrooxidation reduction activity, so the photonic crystal film presents more different dynamic color development processes, and the application degree of the photonic crystal film is improved.

Description

technical field [0001] The invention relates to the field of optical functional materials, in particular to an electrochromic photonic crystal thin film and its preparation method and application. Background technique [0002] Materials with electrochromic properties are called electrochromic materials. Electrochromic performance is a phenomenon in which the optical properties of materials (reflectivity, transmittance, absorptivity, etc.) undergo stable and reversible color changes under the action of an applied electric field, and the appearance is manifested as reversible changes in color and transparency. Existing electrochromic materials include inorganic electrochromic materials and organic electrochromic materials, among which inorganic electrochromic materials are mostly transition metal oxides or their derivatives, such as: WO3 or NiO; organic electrochromic materials can be divided into It is an organic small molecule electrochromic material and a conductive polyme...

Claims

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Application Information

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IPC IPC(8): B32B27/36B32B27/06B32B37/00B32B37/10B05D5/06B05D7/24B60J1/20C08J7/04C09D151/00C09D7/63C08L67/02
CPCB32B27/36B32B27/08B32B37/00B32B37/10B05D5/061B05D7/24C08J7/0427C09D151/003C09D7/63B60J1/20B32B2037/243B32B2250/40B32B2255/10B32B2255/26B32B2307/402B32B2419/00B32B2457/00B32B2605/00C08J2367/02C08J2451/00C08L2205/18C08K5/3432
Inventor 田丰赵国伟
Owner PHOMERA METAMATERIALS INC