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CdSe quantum dot silicon resin composite material emitting white fluorescence and preparation method thereof

A technology of composite materials and quantum dots, which is applied in the field of quantum dot silicone resin composite materials, can solve problems such as shortage, achieve good color rendering, short production time, and good repeatability

Inactive Publication Date: 2012-08-01
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

By adjusting the composition content of the three-color quantum dots, the emission spectrum of the white LED can be obtained, but the blue-green light around 520nm and the yellow light around 580nm are missing in the spectrum

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Weigh 0.76g (4mmol) CdSe quantum dots of six different particle sizes, respectively, and add them into 40ml of n-hexane, ultrasonically disperse for 15 minutes to fully disperse them, and obtain six kinds of CdSe quantum dots with a concentration of 0.1mol / The CdSe quantum dot n-hexane transparent solution of L; the six CdSe quantum dot n-hexane transparent solutions emit different wavelengths of light;

[0029] The particle sizes of CdSe quantum dots in the above six solutions are: 2.31±0.04nm, 2.92±0.04nm, 3.35±0.12nm, 3.68±0.06nm, 4.23±0.12nm, 4.74±0.23nm; The diameter can be as long as it is less than 5nm.

[0030] (2) Measure 10ml CdSe quantum dots n-hexane transparent solution a, 10ml CdSe quantum dots n-hexane transparent solution b, 10ml CdSe quantum dots n-hexane transparent solution c, 20ml CdSe quantum dots n-hexane transparent solution d, 20ml CdSe quantum dots n-hexane Alkane transparent solution e, and 20ml CdSe quantum dot n-hexane transparent solut...

Embodiment 2

[0033] (1) Weigh 0.76g (4mmol) CdSe quantum dots of six different particle sizes, respectively, and add them into 40ml of n-hexane, ultrasonically disperse for 15 minutes to fully disperse them, and obtain six kinds of CdSe quantum dots with a concentration of 0.1mol / The CdSe quantum dot n-hexane transparent solution of L; the six CdSe quantum dot n-hexane transparent solutions emit different wavelengths of light;

[0034] The particle sizes of CdSe quantum dots in the above six solutions are: 2.31±0.04nm, 2.92±0.04nm, 3.35±0.12nm, 3.68±0.06nm, 4.23±0.12nm, 4.74±0.23nm; The diameter can be as long as it is less than 5nm.

[0035](2) Measure 10ml CdSe quantum dots n-hexane transparent solution a, 10ml CdSe quantum dots n-hexane transparent solution b, 20ml CdSe quantum dots n-hexane transparent solution c, 20ml CdSe quantum dots n-hexane transparent solution d, 40ml CdSe quantum dots n-hexane Alkane transparent solution e, and 40ml CdSe quantum dot n-hexane transparent soluti...

Embodiment 3

[0038] (1) Weigh 0.76g (4mmol) CdSe quantum dots of six different particle sizes, respectively, and add them into 40ml of n-hexane, ultrasonically disperse for 15 minutes to fully disperse them, and obtain six kinds of CdSe quantum dots with a concentration of 0.1mol / The CdSe quantum dot n-hexane transparent solution of L; the six CdSe quantum dot n-hexane transparent solutions emit different wavelengths of light;

[0039] The particle sizes of CdSe quantum dots in the above six solutions are: 2.31±0.04nm, 2.92±0.04nm, 3.35±0.12nm, 3.68±0.06nm, 4.23±0.12nm, 4.74±0.23nm; The diameter can be as long as it is less than 5nm.

[0040] (2) Measure 10ml CdSe quantum dots n-hexane transparent solution a, 10ml CdSe quantum dots n-hexane transparent solution b, 20ml CdSe quantum dots n-hexane transparent solution c, 40ml CdSe quantum dots n-hexane transparent solution d, 80ml CdSe quantum dots n-hexane Alkane transparent solution e, and 80ml CdSe quantum dot n-hexane transparent solut...

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Abstract

The invention relates to a quantum dot silicon composite material emitting white fluorescence, which comprises a silicon resin which is colorless and transparent in a visible light region and a CdSe quantum dot white light mixture uniformly dispersed in the silicon resin, wherein the weight ratio of the CdSe quantum dot white light mixture to the silicon resin which is colorless and transparent in the visible light region in the quantum dot silicon composite material emitting white fluorescence is 1-8:99-92. A preparation method of the composite material comprises the following steps: preparing a CdSe quantum dot white light mixture solution; adding the CdSe quantum dot white light mixture solution with a volume corresponding to the content of a white fluorescent material in the composite material to the silicon resin; uniformly mixing, extracting a solvent; uniformly coating the solvent on a smooth glass sheet; and cure-molding to obtain the quantum dot silicon composite material emitting white fluorescence. The composite material can emit white lights under the excitation of ultraviolet lights, the photoluminescent spectrum is continuous, spectral peaks are smooth, and the peak type is similar to the solar spectrum, so the composite material is suitable for luminescent materials of electro-optical devices and white LED solid illuminating devices.

Description

field of invention [0001] The invention relates to a quantum dot silicone resin composite material and its preparation method and application, in particular to a preparation method and application. Background technique [0002] White light emitting diodes (WLED for short) is a new type of solid cold light source. It is regarded as the most promising emerging product in the LED industry. Current scientific research has found that photoaging in WLEDs is not the only reason for resin aging, and another reason for the reduced lifespan of WLEDs is the scattering effect of phosphors. In the practical application of WLED, the main way to avoid resin aging caused by phosphor scattering is to keep the phosphor layer as far away from the LED chip as possible. However, although this method can alleviate the negative impact caused by phosphor light scattering to a certain extent, it cannot completely solve this problem. Solving this problem requires the use of phosphors that do not s...

Claims

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Application Information

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IPC IPC(8): C08L83/00C08K3/30C09K11/88H01L33/50
CPCY02B20/181Y02B20/00
Inventor 付绍云李婉男史汉桥肖红梅杨娇萍
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI