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Laminated photonic crystal with optical performance regulation and preparation method thereof

A photonic crystal, optical performance technology, applied in the field of optical materials and photochemistry, can solve the problems of weak adhesion, many defects, easy to fall off, etc., to achieve the effect of bright color, control the number of layers, and simple operation

Active Publication Date: 2021-01-29
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the advantages of simple operation and easy assembly on the substrate. However, due to the weak adhesion between the colloidal particles and the substrate, the size of the colloidal particles affects the surface roughness, and the particles are affected by gravity, the obtained photonic crystal films are often thin and There are many defects and easy to fall off, so it is difficult to obtain laminated photonic crystals
For this reason, the scientific community tries to use O on the surface of a single-layer photonic crystal 2 Plasma, ultraviolet lamp irradiation, and the method of loading a layer of disordered template spheres can improve the preparation of stacked photonic crystals to a certain extent, and 2-3 layers of stacked photonic crystals have been obtained, but so far many preparations have been made. The research of stacked photonic crystals with stacked layers (>3 layers) has not been reported, which greatly limits the application of photonic crystals

Method used

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  • Laminated photonic crystal with optical performance regulation and preparation method thereof
  • Laminated photonic crystal with optical performance regulation and preparation method thereof
  • Laminated photonic crystal with optical performance regulation and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Step 1: Clean the crystallization dish and glass substrate used in the experiment, and dry them for later use.

[0031] Step 2: Coat a layer of TiO with a thickness of 2-5nm on the glass substrate by spin coating 2 film.

[0032] Step 3: Disperse PMMA colloidal microspheres with a diameter of 401 nm in water to prepare a solution with a concentration of 0.8 wt% (1.0 wt%), place in a crystallization dish and stir for 60 min, and set aside.

[0033] Step 4: Insert the pretreated glass substrate into the above-mentioned crystallization dish containing the 401 nm PMMA colloidal microsphere solution, and place it at a temperature of 40 o C, In a constant temperature and humidity chamber with a humidity of 65%RH, a single-layer photonic crystal film with a single spherical diameter (401 nm) was formed on the substrate by a flow-controlled deposition method.

[0034] Scanning electron microscope (SEM) characterization and ultraviolet-visible transmission spectrum analysis we...

Embodiment 2

[0041] Step 1: Clean the crystallization dish and glass substrate used in the experiment, and dry them for later use.

[0042] Step 2: Coating a layer of TiO with a thickness of 2-5 nm on the glass substrate by spin coating 2 film.

[0043] Step 3: Disperse PMMA colloidal microspheres with a diameter of 318 nm in water to prepare a solution with a concentration of 0.45 wt%, place them in a crystallization dish and stir them for 60 min, and set aside.

[0044] Step 4: Insert the pretreated glass substrate into the above-mentioned crystallization dish containing the 318 nm PMMA colloidal microsphere solution, and place it at a temperature of 40 o C, In a constant temperature and humidity chamber with a humidity of 65%RH, the first layer of unit photonic crystal thin film layer with a single spherical diameter (318 nm) is formed on the substrate by the flow control deposition method.

[0045] Step 5: Disperse PMMA colloidal microspheres with a diameter of 401 nm in water to pre...

Embodiment 3

[0055] Step 1: Clean the crystallization dish and glass substrate used in the experiment, and dry them for later use.

[0056] Step 2: Coating a layer of TiO with a thickness of 2-5 nm on the glass substrate by spin coating 2 film.

[0057] Step 3: Disperse PMMA colloidal microspheres with a diameter of 454 nm in water to form a solution with a concentration of 0.45 wt%, place them in a crystallization dish and stir them for 60 min, and set aside.

[0058] Step 4: Insert the pretreated glass substrate into the above-mentioned crystallization dish containing the 454 nm PMMA colloidal microsphere solution, and place it at a temperature of 40 o C, In a constant temperature and humidity chamber with a humidity of 65% RH, the first layer of unit photonic crystal film layer with a single spherical diameter (454 nm) is formed on the substrate by the flow control deposition method.

[0059] Step 5: Disperse PMMA colloidal microspheres with a diameter of 401 nm in water to prepare a ...

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Abstract

The invention belongs to the field of optical materials and photochemistry, and discloses a laminated photonic crystal and a preparation method thereof. The laminated photonic crystal comprises a substrate, a nano-film layer is arranged on the substrate, multiple unit photonic crystal film layers are arranged on the nano-film layer, and a nano-film layer is also arranged between every two unit photonic crystal film layers. The multiple unit photonic crystal film layers are formed by self-assembly of colloidal microspheres with a single microsphere size. According to the invention, optical regulation and control in an ultraviolet-visible-infrared full-spectrum range can be realized, and the method has wide application potential in the fields of photocatalysis, optical display and control, micro-nano material synthesis and the like. The preparation method of the laminated photonic crystal is simple to operate and mild in condition, and the optical performance of the obtained laminated photonic crystal is easy to control, so that the preparation method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of optical materials and photochemistry, and in particular relates to a laminated photonic crystal capable of regulating optical properties in the ultraviolet-visible-infrared full spectrum range and a preparation method thereof. Background technique [0002] Energy crisis and environmental pollution are two major problems in the process of human sustainable development. As we all know, sunlight has a wide spectral range, high energy, and is environmentally friendly. It is the ultimate source of maintaining the activities of various life forms on the earth. Carrying out all-round and diversified utilization of light energy is the ultimate way to solve energy and environmental problems. Photonic crystals are an ordered structure formed by periodic arrangement of two or more materials with different dielectric constants (refractive indices), and have unique optical characteristics of "photonic band gap", and the width ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0216H01L31/0256H01L31/0352
CPCH01L31/02167H01L31/0256H01L31/0352
Inventor 赵江红李杰峰陈欣月刘雪梅赵永祥
Owner SHANXI UNIV
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