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Perovskite quantum dot glass and preparation method and application thereof

A technology of quantum dot glass and perovskite, applied in glass manufacturing equipment, glass furnace equipment, manufacturing tools, etc., can solve the problems of uneven size of quantum dots, uncontrollable volatilization of raw materials, low product yield, etc., to reduce raw materials The effect of volatilization, reducing thermal stress and improving product yield

Pending Publication Date: 2022-05-10
WUXI UTMOST LIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problems of non-uniform size of quantum dots and low product yield caused by uncontrollable volatilization of raw materials and residual thermal stress of the glass during the preparation process of the existing perovskite quantum dot glass.

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  • Perovskite quantum dot glass and preparation method and application thereof
  • Perovskite quantum dot glass and preparation method and application thereof
  • Perovskite quantum dot glass and preparation method and application thereof

Examples

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preparation example Construction

[0033] The preparation method of perovskite quantum dot glass provided by the invention comprises the following steps:

[0034] (1) Accurately weigh various raw materials according to the composition of each sample, mix the weighed solid powder into a corundum mortar and grind evenly, pass through a 50 μm particle size sieve, and place the screened powder in graphite (or corundum) in the crucible;

[0035] (2) Place the graphite crucible with the raw material powder in the hot isostatic pressing furnace to ensure good airtightness, then raise the temperature from room temperature to 200-300°C at a rate of 2-15°C / min, keep it warm for 20min, and turn on the vacuum pump at the same time Vacuumize to remove the water and oxygen in the raw materials and the air to avoid oxidation of the graphite crucible and raw materials;

[0036] (3) Turn off the vacuum pump, raise the temperature from 200-300°C to 1100-1200°C at a rate of 1-10°C / min, keep it warm for 15-30min, and fill it with...

Embodiment 1

[0040] Example 1: Green light CsPbBr 3 Preparation of borosilicate glass with perovskite quantum dots

[0041] The glass matrix raw material and the quantum dot precursor raw material are according to the molar ratio of 30SiO 2 -30B 2 o 3 -20ZnO-10Cs 2 CO 3 -5PbBr 2 -5NaBr for proportioning, accurately weigh each raw material, pour the weighed solid powder into a corundum mortar and grind evenly, after screening with a particle size of 50 μm, place the screened powder in a graphite crucible. Place the graphite crucible with the sample in a hot isostatic pressing furnace to ensure good airtightness, then raise the temperature from room temperature to 300°C at a rate of 10°C / min, keep it warm for 20min, and turn on the vacuum pump to evacuate at the same time to remove water and oxygen. Turn off the vacuum pump, raise the temperature from 300°C to 1200°C at a rate of 5°C / min, control the pressure in the chamber to be constant at 5 MPa by filling with argon, and keep the t...

Embodiment 2

[0043] Example 2: Green light CsPbBr 3 Preparation of Perovskite Quantum Dot Phosphate Glass

[0044] According to molar ratio 56P 2 o 5 -10SiO 2 -10Cs 2 CO 3 -5PbBr 2 -6Sr 2 CO 3 -3Al 2 o 3 -10NaBr is used for proportioning. Since the melting point of phosphate glass is slightly lower, the melting temperature is set at 1150° C., kept for 20 minutes, and finally annealed at 500° C. for 4 hours. The other steps are the same as those in Example 1. The particle size of the ball-milled glass powder is about 6 μm, the luminescence peak is 522 nm, the half-maximum width is 24 nm, and the quantum efficiency is 42%.

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Abstract

The invention belongs to the field of solid luminescent materials, and particularly relates to perovskite quantum dot glass and a preparation method and application thereof.The perovskite quantum dot glass is prepared through a pressure-adjustable high-temperature-resistant closed container, the boiling point of a quantum dot precursor can be increased through high pressure, volatilization of raw materials is reduced, and due to the closed environment, the performance of the perovskite quantum dot glass is improved. The volatilization of raw materials can be effectively controlled from the source, the size uniformity of the quantum dots in the glass is greatly improved, and the raw materials are not wasted and the environment is not polluted. Besides, the annealing step and the high-temperature melting step are carried out in the same closed container, so that the temperature and the shape of the glass melt can be prevented from being rapidly changed, the thermal stress of the glass is reduced, the product yield is improved, meanwhile, the process operation is simpler and more convenient, the production repeatability is better, the heat energy of the annealing step is saved, and the production cost is reduced. Therefore, the preparation method disclosed by the invention can be suitable for industrial large-scale production.

Description

technical field [0001] The invention belongs to the field of solid luminescent materials, and in particular relates to a preparation method of perovskite quantum dot glass which can improve the size uniformity of quantum dots. Background technique [0002] All inorganic CsPbX 3 (X=Cl, Br, I) perovskite quantum dots have attracted extensive attention in recent years due to their high quantum efficiency, tunable wavelength, simple synthesis method, and high reproducibility. Perovskite quantum dots have shown broad application prospects in flat panel display, lighting, medical X-ray detection imaging, solar cells and other fields. However, the poor stability of perovskite quantum dots, especially the extreme sensitivity to moisture and high temperature environments, severely limits its application. [0003] Although many process strategies have been developed to stabilize it, from the perspective of feasibility, the method of using shell coating to protect the perovskite lumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C4/12C03C14/00C03C10/16C03B25/00C03B5/00
CPCC03C4/12C03C14/006C03C10/16C03B25/00C03B5/00
Inventor 董敬一郑策张健
Owner WUXI UTMOST LIGHT TECH CO LTD
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