Composite luminescent material and preparation method thereof

A luminescent material, solid-phase mixing technology, applied in luminescent materials, chemical instruments and methods, lead compounds, etc., can solve the problems of high production cost of quantum dots, restricting industrialization and application, and high requirements for bulk purity. The effect of saving raw materials, reducing production costs and low cost

Inactive Publication Date: 2020-03-24
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the current traditional quantum dot synthesis technology has the following problems: the synthesis process is complicated; a large amount of organic solvents are used in both synthesis and purification, and some solvents have high toxicity, and the discarded solvents cause huge pressure on the ecological environment; Precursor purity requirements are particularly high
[0004] The above problems have caused the production cost of quantum dots to remain high, and the environmental pollution is huge, which seriously restricts its industrialization and application.

Method used

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  • Composite luminescent material and preparation method thereof
  • Composite luminescent material and preparation method thereof
  • Composite luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] CsPbBr 3 / Al 2 O 3 Preparation of composite luminescent materials

[0069] a. (1) Put 158.5mg (0.745mmol) CsBr, 273.4mg (0.745mmol) PbBr 2 And 4.5648g (22.35mmol) of aluminum isopropoxide raw materials are charged into the planetary ball mill, and the raw materials are fully mixed by ball milling;

[0070] (2) Spread the homogeneous mixture obtained in step (1) flat in an alumina crucible, and place it in a tube furnace for high-temperature calcination at 800°C for 10 minutes under a nitrogen atmosphere;

[0071] (3) After the product of step (2) is cooled to room temperature, it is pulverized in a planetary ball mill so that the particle size of the obtained material is less than 80μm, and then annealed in a box furnace at 500°C for 10 minutes under an air atmosphere to obtain the final CsPbBr 3 / Al 2 O 3 Composite luminescent material.

[0072] For the CsPbBr prepared in Example 1a 3 / Al 2 O 3 The composite luminescent material is tested for TEM, XRD, optical performance and ...

Embodiment 2

[0097] CsPbBr 3 / SiO 2 Preparation of composite luminescent materials

[0098] a. (1) Combine 106.4mg (0.5mmol) CsBr, 183.5mg (0.5mmol) PbBr 2 And 901.2 (15mmol) silica raw materials are put into a planetary ball mill, and the raw materials are fully mixed by ball milling;

[0099] (2) Spread the homogeneous mixture obtained in step (1) flat in an alumina crucible, and place it in a tube furnace for high-temperature calcination at 800°C for 10 minutes under a nitrogen atmosphere;

[0100] (3) After the product of step (2) is cooled to room temperature, it is pulverized in a planetary ball mill so that the particle size of the obtained material is less than 80 μm, which is the final CsPbBr 3 / SiO 2 Composite luminescent material.

[0101] b. (1) Combine 53.2mg (0.25mmol) CsBr, 91.7mg (0.25mmol) PbBr 2 Mix with 1.13mL (7.5mmol) of tetramethyl silicate raw material, add 10mL pure water and react for 4h under magnetic stirring to completely hydrolyze tetramethyl silicate;

[0102] (2) Dry t...

Embodiment 3

[0105] CsPbBr 3 / ZrO 2 Preparation of composite luminescent materials

[0106] (1) Combine 53.2mg (0.25mmol) CsBr, 91.7mg (0.25mmol) PbBr 2 And 924.1mg (7.5mmol) zirconium dioxide raw materials are put into the planetary ball mill, fully ball milled to make the raw materials evenly mixed;

[0107] (2) Spread the homogeneous mixture obtained in step (1) flat in an alumina crucible, and place it in a tube furnace for high-temperature calcination at 800°C for 10 minutes under a nitrogen atmosphere;

[0108] (3) After the product of step (2) is cooled to room temperature, it is pulverized in a planetary ball mill so that the particle size of the obtained material is less than 80 μm, which is the final CsPbBr 3 / ZrO 2 Composite luminescent material.

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Abstract

The invention relates to a composite luminescent material and a preparation method thereof. The composite luminescent material is generated by uniformly mixing a quantum dot precursor and an oxide ora precursor of the oxide according to a certain ratio and then calcining the obtained mixture at a high temperature. Compared with traditional methods, the method of the invention has the advantages of simple synthesis process, low cost, no solvent, high quantum efficiency, and realization of large-scale production; and the prepared luminescent material has a high luminescent intensity, a high luminescent color purity and a good photo-thermal stability, and lays a foundation for theoretical research and application of the material in high-performance photoluminescent devices, lasers and nonlinear optical devices.

Description

Technical field [0001] The invention belongs to the technical field of luminescent materials, and specifically relates to a quantum dot / oxide composite luminescent material and a preparation method thereof. Background technique [0002] Since quantum dots were discovered in the 1980s, they have aroused widespread interest in scientific research and industry due to their excellent photoelectric properties. Compared with traditional fluorescent materials, the fluorescence of quantum dots has the advantages of narrow half-peak width, small particles, no scattering loss, and adjustable spectrum with size. It is widely considered to have great application prospects in the fields of display, lighting, and biofluorescence labeling. Many countries have invested a lot of manpower and material resources in the research of quantum dot materials, so that the optoelectronic performance of quantum dots has been continuously improved, and prototype devices for related applications have also app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66C09K11/88C09K11/56C09K11/70C09K11/62B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/025C09K11/565C09K11/621C09K11/665C09K11/70C09K11/88C01B19/007C01G11/006C01G15/006C01G21/006C01G39/006C01P2002/72C01P2004/04C01P2004/61C01P2004/80C09K11/02C09K11/883B01J6/001C01D17/00C09K11/64
Inventor 李良汪波
Owner SHANGHAI JIAO TONG UNIV
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