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Preparation method of white light source containing double-bandgap photonic crystal

A technology of photonic crystals and white light sources, applied in semiconductor devices, electrical components, circuits, etc.

Active Publication Date: 2015-12-23
JIANGMEN POLYTECHNIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many studies on the use of photonic crystals to improve the luminous efficiency of semiconductor chips, but the preparation method of white light sources based on double-bandgap photonic crystals to achieve the improvement of the luminous intensity of white light sources has not been reported.

Method used

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  • Preparation method of white light source containing double-bandgap photonic crystal
  • Preparation method of white light source containing double-bandgap photonic crystal
  • Preparation method of white light source containing double-bandgap photonic crystal

Examples

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Comparison scheme
Effect test

Embodiment 1

[0059] (1) The emulsion containing monodisperse silica particles with an average particle size of 180 nm at a concentration of 1 wt % was left to stand at a constant temperature of 40 ° C for 24 hours, and a large area of ​​monodisperse silica particles was obtained on a glass substrate by vertical deposition method. Bandgap photonic crystal thin film; then another emulsion containing monodisperse silica particles with an average particle size of 280nm at a concentration of 1wt% was placed at a constant temperature of 40°C for 24h, and the vertical deposition method was used on the above-mentioned A glass substrate with a single-bandgap photonic crystal film is vertically deposited for assembly, and a large-area double-bandgap photonic crystal film can be obtained on the glass substrate. Among them, the particle diameters of the above two monodisperse inorganic oxide particles are different, and the particle diameters of the respective inorganic oxide particles are the same; th...

Embodiment 2

[0065] (1) The emulsion containing monodisperse polystyrene particles with an average particle size of 200nm at a concentration of 0.2wt% is used as an inkjet printing ink in an ink cartridge for a conventional inkjet printer, and then the glass is processed by the printer according to the usual method. The base material is printed, and after the printing film is dried, a large-area single-band gap photonic crystal film can be obtained on the glass base material; As an inkjet printing ink, it is installed in the ink cartridge of a conventional inkjet printer, and then the above-mentioned glass substrate that has been printed with a single-bandgap photonic crystal film is printed by the printer according to the usual method, and the printing film on the glass substrate is dry. Finally, a large-area double-bandgap photonic crystal film with a two-photon bandgap in the visible light region can be obtained on a glass substrate. The double-bandgap photonic crystal film with two-pho...

Embodiment 3

[0069] (1) Put the emulsion containing monodisperse poly(styrene-methyl methacrylate-acrylic acid) particles with a concentration of 2wt% and an average particle size of 270nm in a container with a conventional air spray gun, aim the spray gun at the glass The substrate is sprayed, and after the film is dried, a large-area single-bandgap photonic crystal film can be obtained on the quartz substrate; another monodisperse poly(styrene- The emulsion of methyl methacrylate-acrylic acid) particle is contained in the container with conventional air spray gun, and then the spray gun is aimed at the above-mentioned quartz substrate that has been sprayed with single-bandgap photonic crystal thin film to spray, after coating film dries, A large-area double-bandgap photonic crystal film can be obtained on a quartz substrate. The double-bandgap photonic crystal film is formed by stacking two kinds of monodisperse poly(styrene-methyl methacrylate-acrylic acid) particles with different part...

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Abstract

The invention belongs to the technical field of luminescence and illumination, relates to the application technology of photonic crystals, and particularly relates to a preparation method utilizing the dual-photonic-band-gap characteristic and the large specific surface area of the dual-band-gap photonic crystals to improve the luminescent intensity of a white light source. The method includes the steps that a three-primary-color luminescent material suitable for ultraviolet excitation is selected, then a dual-band-gap photonic crystal thin film with high quality is built, dual-photon forbidden bands of the dual-band-gap photonic crystal solid luminescent thin film are respectively matched with the peak position of the excitation wavelength of an ultraviolet LED and the peak position of the emitting wavelength of a red luminescent material, and the solid luminescent thin film is combined with the ultraviolet LED to prepare the white light source which is high in luminescent intensity. The method is simple in process and low in preparation cost, the obtained white light source which is high in luminescent intensity can be applied to white background illumination, an auxiliary light source, a white illumination light source and the like of a display device.

Description

technical field [0001] The invention belongs to the technical field of lighting and lighting, and relates to the application technology of photonic crystals, in particular to a preparation method for improving the luminous intensity of a white light source by utilizing the two-photon bandgap characteristics and large specific surface area of ​​the double-bandgap photonic crystal. Background technique [0002] White light-emitting diode (LED) is a new type of solid cold light source. Compared with traditional incandescent lamps and fluorescent lamps, it has the advantages of miniaturization, long life, and low power consumption. It is known as a new generation that will surpass incandescent lamps and fluorescent lamps. Lighting source. White LEDs are mainly used in large-screen displays, various indicator lights, some road lighting, landscape lighting, etc., and are rapidly developing into automotive taillights, LCD backlights, home lighting and other fields. [0003] At pre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50H01L33/00
Inventor 李珩徐朝华孙宁
Owner JIANGMEN POLYTECHNIC