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Novel high-scattering quantum dot fluorescent powder and preparation method thereof

A technology of scattering quantum and phosphor powder, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as being unsuitable for large-scale industrial production, limited number of quantum dots, unable to meet demand, etc., to achieve suitable for large-scale production, color Adjustable, superior optical properties

Active Publication Date: 2015-06-03
HENAN UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method takes a long time, and the number of quantum dots that can be embedded is limited, which cannot meet the needs of practical applications and is not suitable for large-scale industrial production.

Method used

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  • Novel high-scattering quantum dot fluorescent powder and preparation method thereof
  • Novel high-scattering quantum dot fluorescent powder and preparation method thereof
  • Novel high-scattering quantum dot fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A new type of high-scattering quantum dot phosphor is prepared by using sodium chloride as the matrix and CdSe / ZnS quantum dots as the luminescent center.

[0024] The preparation method of the above-mentioned novel high-scattering quantum dot phosphor includes the following steps:

[0025] Transfer 3g of sodium chloride powder into a beaker, add 300ml of distilled water, stir for 10 minutes, then add 30mg of CdSe / ZnS (PL 607 nm) quantum dots, stir magnetically at room temperature for 7 minutes, and then ultrasonicate for 5 minutes (ultrasonic power 100W); Then magnetic stirring at room temperature for 15 minutes, the mixed solution was transferred to a spray drying device for spray drying at 150° C. to obtain a powdery QDNaCl phosphor product. CdSe / ZnS quantum dots can be prepared by referring to the following literatures: Changhua Zhou, Huaibin Shen, Yi Guo, Li Xu, Jinzhong Niu, Zhijun Zhang, Zuliang Du, Jianmin Chen, Lin Song Li, A versatile method for the preparatio...

Embodiment 2

[0028] A new type of high-scattering quantum dot fluorescent powder is prepared with nano-scale silicon dioxide as the matrix and CdSe / ZnS quantum dots as the luminescent center.

[0029] The preparation method of above-mentioned novel high-scattering quantum dot fluorescent powder, it comprises the steps:

[0030] Take 3g of silica powder (particle size 30nm) into a beaker, add 500ml of distilled water, stir magnetically at room temperature for 40 minutes, sonicate for 10 minutes (ultrasonic power 100W), stir magnetically at room temperature for 15 minutes, then add 15mg CdSe to the beaker / ZnS (PL 607 nm) quantum dots, first magnetically stirred at room temperature for 15 minutes, then ultrasonically for 20 minutes (ultrasonic power 100W), then magnetically stirred at room temperature for 20 minutes, then transferred the mixed solution to a spray drying device and spray-dried at 150°C. Obtain powdered QDSiO 2 Phosphor products.

[0031] Take a small amount of the above-menti...

Embodiment 3

[0033] A novel high-scattering quantum dot fluorescent powder is prepared by using potassium chloride as a matrix and CdSe / ZnS quantum dots as luminescent centers.

[0034] The preparation method of above-mentioned novel high-scattering quantum dot fluorescent powder, it comprises the steps:

[0035] Transfer 3g of potassium chloride powder into a beaker, add 250ml of distilled water, stir magnetically at room temperature for 5 minutes, then add 20mg of CdSe / ZnS (PL 530 nm) quantum dots, stir magnetically at room temperature for 2 minutes, and then sonicate for 4 minutes (ultrasonic power 100W); then magnetically stirred at room temperature for 9 minutes, and the mixed solution was transferred to a spray drying device and spray-dried at 150°C to obtain a powdered QDKCl phosphor product.

[0036] Use a fluorescence spectrometer to test the emission spectrum of the above-mentioned products, the excitation light wavelength is 365nm, and the obtained results are as follows Figur...

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Abstract

The invention relates to a novel high-scattering quantum dot fluorescent powder and a preparation method thereof. The preparation method comprises the following steps: mixing a water-soluble quantum dot with a certain concentration of the inorganic saline solution or a nano-oxide ultrasonically dispersed in the water, stirring, performing ultrasound wave, stirring, performing spray drying on the mixed solution under a certain temperature to obtain the novel fluorescent powder by taking the inorganic salt or the nano-oxide assembly as a matrix and taking a fluorescent quantum dot as a luminescence center. The fluorescent powder has excellent optical performances of the quantum dot, such as wide and continuous distribution of the excitation spectrum, narrow and symmetrical emission spectrum, adjustable color, saturated color and high photochemical stability and the like; the matrix material has a protective effect on the embedded quantum dot so that the fluorescent powder has a high scattering property. The rare earth resource is not used so that the sustainable development of the resource can be realized. The spray drying method is suitable for the industrial production and the produced high-scattering quantum dot fluorescent powder can be used for designing a high-quality illuminating and displaying device.

Description

technical field [0001] The invention belongs to the technical field of light emission and display, and in particular relates to a novel high-scattering quantum dot fluorescent powder and a preparation method thereof. Background technique [0002] Currently, solid-state lighting light-emitting diodes (LEDs) are receiving a lot of attention. The efficiency of existing LEDs has far exceeded that of traditional incandescent lamps. According to conservative predictions: solid-state lighting already has the potential to defeat fluorescent lamps and high-voltage lamps in the next decade. There are two typical architectures for solid-state lighting: one is a combination of red LEDs, green LEDs, and blue LEDs; the other is a combination of ultraviolet LED chips or blue LED chips with color-converting phosphors. A reasonable combination of materials requires a high-efficiency ultraviolet or blue LED chip and a light conversion layer. The light conversion layer needs to have high pho...

Claims

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Application Information

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IPC IPC(8): C09K11/88C09K11/56C09K11/62
Inventor 李林松张昕彤张雪静申怀彬周长华
Owner HENAN UNIVERSITY
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