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CdSe quantum dot-containing silicone base composite material and preparation method and application thereof

A technology of composite materials and quantum dots, which is applied in the fields of silicone resin-based composite materials containing CdSe quantum dots and their preparation methods and uses, can solve the problems of uneven spatial chromaticity of LEDs, shortening the service life of LEDs, and accelerating the aging of packaging resin materials. , to achieve the effect of simple method, improved uniformity and extended service life

Inactive Publication Date: 2012-06-13
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional whitening technology of LED is to coat the LED chip with phosphor and then encapsulate it with epoxy resin. The light scattering effect of phosphor will accelerate the aging of packaging resin material and shorten the service life of LED. At the same time, the packaging structure Restrictions often lead to the problem of uneven chromaticity in LED space
[0003] Quantum Dots (QD) particle size is very small, only a few nanometers, can completely avoid the light scattering effect caused by traditional phosphors, and can produce different colors of monochromatic light or even white light according to size changes. It is simply impossible to achieve with traditional phosphors

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Disperse 0.01g of CdSe quantum dot particles with a particle size of 1.5nm in 2mL of n-hexane to obtain a n-hexane solution containing CdSe quantum dots; 10g of solvent-free silicone resin (Dow Corning OE6665) with a light transmittance of 99% was dissolved in 2mL of acetone to obtain a silicone resin acetone solution; then the above two solutions were uniformly mixed, the solvent was completely evaporated under vacuum, and then placed in an oven, cured at 150 ° C for 1 hour to obtain a silicone resin composite material containing CdSe quantum dots (its fluorescence The emission position is in the blue light area);

[0024] The silicone resin composite material containing CdSe quantum dots prepared in this embodiment, the content of CdSe quantum dots is 0.1wt% of the prepared silicone resin composite material containing CdSe quantum dots;

[0025] The above-mentioned silicone resin composite material containing CdSe quantum dots before curing can be injected into the LE...

Embodiment 2

[0027] Disperse 0.05 g of CdSe quantum dot particles with a particle size of 3 nm in 2 mL of toluene to obtain a chloroform solution of CdSe quantum dots; acetone to obtain a silicone resin acetone solution; then after the above two solutions are uniformly mixed, the film is coated, and after the solvent is completely volatilized, it is dried at 180°C for 1h to obtain a silicone resin composite material containing CdSe quantum dots (the content of CdSe quantum dots is 0.5wt% of the silicone resin composite material containing CdSe quantum dots), its fluorescence emission position is in the blue light region.

[0028] The uncured above-mentioned silicone resin composite material containing CdSe quantum dots is coated on the filter, and cured at room temperature, then the filter can be used to realize the light source conversion from ultraviolet light to blue light.

Embodiment 3

[0030] Disperse 0.2g of CdSe quantum dot particles with a particle diameter of 4nm in 5mL of chloroform to obtain a chloroform solution of CdSe quantum dots; 10g of non-solvent type silicone resin with a light transmittance of 95% (Guangzhou Kangerjia Organic Silicon Material Co., Ltd. KE560) was dissolved in 5mL ethanol to obtain a silicone resin acetone solution; then after the above two solutions were uniformly mixed, the solvent was completely evaporated in vacuum, and solidified at room temperature to obtain a silicone resin composite material containing CdSe quantum dots (the content of CdSe quantum dots was The silicone resin composite material containing CdSe quantum dots obtained is 2wt%), and its fluorescence emission position is in the green light region.

[0031] Coating the above-mentioned silicone resin composite material containing CdSe quantum dots before being cured on the filter, and curing at room temperature, the filter can be used to realize the light sourc...

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Abstract

The invention relates to a CdSe quantum dot-containing silicone base composite material, which is a nanometer composite material consisting of a colorless and transparent silicone and CdSe quantum dot particles uniformly dispersed in the silicone, and the mass ratio of the CdSe quantum dot to the silicone in the composite material is 0.1-10. The preparation method of the composite material comprises the following steps of: dissolving the CdSe quantum dot particles with different particle diameters into an organic solvent to obtain a CdSe quantum dot solution; meanwhile dissolving the siliconeinto a proper solution to obtain a silicone solution; and then uniformly mixing the corresponding CdSe quantum dot solution with the silicone solution according to the CdSe content in the composite material, vacuumizing to completely volatilize the solvent, then placing into a baking oven, and solidifying and forming to obtain the CdSe quantum dot-containing silicone composite material. The composite material has a certain transparence and favorable luminescent property and is suitable for surface package of photoelectric devices, LED solid lighting device or outdoor neon lights.

Description

technical field [0001] The invention relates to a silicone resin nanocomposite material, its preparation method and application, more specifically, the invention relates to a silicone resin-based composite material containing CdSe quantum dots, its preparation method and application. Background technique [0002] Light Emitting Diode (LED) is a high-efficiency solid light source that is expected to replace a large number of practical fluorescent tubes or light bulbs. The traditional whitening technology of LED is to coat the LED chip with phosphor and then encapsulate it with epoxy resin, and the light scattering effect of phosphor will accelerate the aging of the packaging resin material and shorten the service life of the LED. At the same time, the packaging structure Limitations often lead to problems with LED spatial chromaticity non-uniformity. [0003] Quantum Dots (QD) particle size is very small, only a few nanometers, can completely avoid the light scattering effec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/00C08K3/30C09K11/88F21V9/10H01L33/00F21V9/40
Inventor 付绍云杨洋
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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