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Perovskite quantum dot with core-shell filling layer, preparation method and application

Pending Publication Date: 2022-03-18
WUXI UTMOST LIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although many such methods can obtain perovskite quantum dot materials with better stability, their light and thermal stability are still far from practical applications and cannot meet market demand.

Method used

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  • Perovskite quantum dot with core-shell filling layer, preparation method and application
  • Perovskite quantum dot with core-shell filling layer, preparation method and application
  • Perovskite quantum dot with core-shell filling layer, preparation method and application

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Embodiment 1

[0054] This embodiment provides a method for preparing perovskite quantum dots with a core-shell filling layer, such as figure 1 Shown, described preparation method comprises:

[0055] (I) Dissolve 0.1g potassium bromide in 25ml deionized water to form a slump agent solution, stir and heat 0.2g MCM-41 molecular sieve powder and slump agent solution at 150°C, the average diameter of MCM-41 molecular sieve powder is 3.5nm, After evaporating to dryness, prepare the material of the shell, the shell material after evaporating to dryness and 0.0667g bulk phase CsPbBr 3 Grinding and mixing, and performing the first heat treatment at 590°C for 30 minutes, so that the perovskite quantum dot core grows in situ in the pores of the shell material, thereby entering the shell;

[0056] (II) Immerse the material prepared in step (I) in 30ml of toluene, add 0.2g of aluminum isopropoxide, ultrasonically disperse and keep stirring for 8 hours, centrifuge and dry, and fill the shell with alumin...

Embodiment 2

[0059] This embodiment provides a method for preparing perovskite quantum dots with a core-shell filling layer, such as figure 1 Shown, described preparation method comprises:

[0060] (I) Dissolve 0.1g potassium bromide in 25ml deionized water to form a slump agent solution, stir and heat 0.2g MCM-41 molecular sieve powder and slump agent solution at 150°C, the average diameter of MCM-41 molecular sieve powder is 3.5nm, After evaporating to dryness, prepare the material of the shell, the shell material after evaporating to dryness and 0.0667g bulk phase CsPbBr 3 Grinding and mixing, and performing the first heat treatment at 590°C for 30 minutes, so that the perovskite quantum dot core grows in situ in the pores of the shell material, thereby entering the shell;

[0061] (II) The material prepared in step (I) was ground with 0.2 g of potassium nitrate, and heat-treated at 350° C. for 60 min to prepare the perovskite quantum dots with a core-shell filling layer.

Embodiment 3

[0063] This embodiment provides a method for preparing perovskite quantum dots with a core-shell filling layer, such as figure 1 Shown, described preparation method comprises:

[0064] (I) Dissolve 0.1g of potassium bromide in 25ml of deionized water to form a slump agent solution, stir and heat 0.2g of SBA molecular sieve powder and slump agent solution at 150°C, the average pore size of the SBA molecular sieve powder is 6nm, evaporate to dryness and prepare Obtain the material of the shell, the shell material and 0.0667g bulk phase CsPbBr after evaporation to dryness 3 Grinding and mixing, and performing the first heat treatment at 590°C for 30 minutes, so that the perovskite quantum dot core grows in situ in the pores of the shell material, thereby entering the shell;

[0065] (II) Immerse the material prepared in step (I) in 30ml of toluene, add 0.2g of aluminum isopropoxide, ultrasonically disperse and keep stirring for 8 hours, centrifuge and dry, and fill the shell wit...

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Abstract

The invention provides a perovskite quantum dot with a core-shell filling layer, a preparation method and an application, the perovskite quantum dot with the core-shell filling layer comprises a shell and perovskite quantum dot cores arranged in the shell, and a filling material is filled between the perovskite quantum dot cores in the shell. The filling material is arranged in the core-shell structure, firm chemical bonding is formed between the filling material and the surface of the quantum dot, the filling material and the perovskite quantum dot core are matched to fill the inner space of the shell, and the space confinement effect is achieved through space occupation, so that quantum dot lattices are in a relatively stable state; and the service life of the perovskite quantum dot material is further prolonged.

Description

technical field [0001] The invention belongs to the technical field of perovskite quantum dots, and relates to a perovskite quantum dot with a core-shell filling layer, a preparation method and an application. Background technique [0002] With the development of science and technology, quantum dot display technology has become one of the most important components of modern optoelectronic products. With the popularization and development of optoelectronic products, the requirements for material display performance, stability and environmental protection are increasing day by day. Compared with traditional semiconductor quantum dots, lead halide perovskite quantum dots have gradually become a strong competitor in the field of display in recent years due to their excellent optical properties, low synthesis cost and environmental friendliness. [0003] However, the current lead halide perovskite quantum dot materials are difficult to maintain good stability under harsh conditi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66
CPCC09K11/665C09K11/025
Inventor 张健郑策邢泽咏
Owner WUXI UTMOST LIGHT TECH CO LTD
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