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Core-shell structure photonic crystal electrochromic composite film and preparation method thereof

A photonic crystal and electrochromic technology, applied in the coating and other directions, can solve the problems of short life and poor cycle stability of color-changing films, and achieve the effects of low cost, enhanced optical contrast and response rate, and improved conductivity and transparency.

Pending Publication Date: 2022-02-11
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current core-shell inverse opal electrochromic film still faces the disadvantages of poor cycle stability and short lifespan.

Method used

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  • Core-shell structure photonic crystal electrochromic composite film and preparation method thereof
  • Core-shell structure photonic crystal electrochromic composite film and preparation method thereof
  • Core-shell structure photonic crystal electrochromic composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Step 1: Use the wet-treated FTO glass as the substrate, insert the PS microspheres with a concentration of 0.1wt% vertically at 90°, put them in a 50°C oven for self-assembly until the water evaporates, and obtain a regularly arranged PS colloidal crystal template.

[0034] Step 2: Mix 1.06g sodium tungstate dihydrate, 0.6ml hydrogen peroxide, 16.6ml perchloric acid and 0.22g structure directing agent with 240ml deionized water to prepare WO 3 Precursor, ultrasonically stirred for 18 minutes to obtain the desired electrolyte.

[0035] Step 3, using the PS colloidal crystal template prepared in step 1 as the working electrode, silver / silver chloride as the reference electrode, and platinum sheet as the counter electrode in a three-electrode system to deposit WO in the voids of PS microspheres 3 , Electrodeposition for 300s. After filling, wash 4 times with ethanol and deionized water respectively, N 2 WO obtained after drying in air 3 / PS photonic crystal thin film. ...

Embodiment 2

[0045] Step 1: Use the wet-treated FTO glass as the substrate, insert the PS microspheres with a concentration of 0.14wt% vertically at 90°, put them in a 53°C oven for self-assembly until the water evaporates, and obtain a regularly arranged PS colloidal crystal template.

[0046] Step 2: Mix 1.05g sodium tungstate dihydrate, 0.6ml hydrogen peroxide, 16.7ml perchloric acid and 0.23g structure directing agent with 260ml deionized water to prepare WO 3 Precursor, ultrasonically stirred for 20 minutes to obtain the required electrolyte.

[0047] Step 3, using the PS colloidal crystal template prepared in (1) as the working electrode, silver / silver chloride as the reference electrode, and platinum sheet as the counter electrode in a three-electrode system to deposit WO in the voids of PS microspheres 3 , electrodeposition 270s. After filling, wash 5 times with ethanol and deionized water respectively, N 2 WO obtained after drying in air 3 / PS photonic crystal thin film.

[00...

Embodiment 3

[0052] Step 1: Use the wet-treated FTO glass as the substrate, insert PS microspheres with a concentration of 0.13wt% vertically at 90°, put them in a 55°C oven for self-assembly until the water evaporates, and obtain regularly arranged PS colloidal crystal templates.

[0053] Step 2: Mix 1g of sodium tungstate dihydrate, 0.65ml of hydrogen peroxide, 16.8ml of perchloric acid and 0.23g of structure-directing agent with 260ml of deionized water to prepare WO 3 Precursor, ultrasonically stirred for 25 minutes to obtain the required electrolyte.

[0054] Step 3, using the PS colloidal crystal template prepared in (1) as the working electrode, silver / silver chloride as the reference electrode, and platinum sheet as the counter electrode in a three-electrode system to deposit WO in the voids of PS microspheres 3 , electrodeposition 320s. After filling, wash 4 times with ethanol and deionized water respectively, N 2 WO obtained after drying in air 3 / PS photonic crystal thin film...

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Abstract

The invention discloses a core-shell structure photonic crystal electrochromic composite film, wherein the electrochromic composite film is formed by electrically polymerizing WO3 inverse opal with a conductive polymer PEDOT, the WO3 inverse opal is a core skeleton, and the conductive polymer PEDOT is a shell layer. The WO3 inverse opal structure is a porous hexagonal array, the aperture of the WO3 inverse opal is 700-800 nm, after the PEDOT is electrically polymerized, the inner diameter of the inverse opal is 500-600 nm, and the thickness of the PEDOT layer is 100-300 nm. The invention further discloses a preparation method of the core-shell structure photonic crystal electrochromic composite film. According to the core-shell structure photonic crystal electrochromic composite film and the preparation method thereof, the preparation method is simple and easy to implement and low in preparation cost, and the prepared electrochromic composite film is stable in structure, excellent in performance and long in cycle life.

Description

technical field [0001] The invention relates to a photonic crystal electrochromic composite film with a core-shell structure and a preparation method thereof, belonging to the technical field of electrochromic composite materials. Background technique [0002] Electrochromic (EC) materials have been widely used in the field of smart window building energy conservation because of their ability to reversibly adjust the optical properties of windows only by applying a very low voltage. About 45% of the energy radiated from the sun to the earth comes from visible light (390-760nm), and 50% comes from the near-infrared band (760-2500nm). However, the regulation of most electrochromic smart windows is limited to the visible light band, and there are not many researches and developments on near-infrared light. Therefore, how to use the full-band energy of solar energy to reduce energy consumption in temperature control and lighting has become the key to building energy management ...

Claims

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Application Information

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IPC IPC(8): C03C17/42
CPCC03C17/42C03C2217/425C03C2217/445C03C2217/475C03C2218/115C03C2218/355
Inventor 卜小海翟文超冯明鑫钱唯唯张泽武闫家清刘艳梅蒋晓明
Owner NANJING INST OF TECH
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