Perovskite quantum dot glass film and preparation method and application thereof

A technology of quantum dot glass and perovskite, which is applied in chemical instruments and methods, instruments, luminescent materials, etc., can solve the problems of low luminescence quantum efficiency of quantum dot glass and can not reach industrial applications, and achieve wide color gamut Display and improve the effect of quantum efficiency

Active Publication Date: 2021-05-28
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The only drawback is that the luminous quantum efficiency of quantum dot glass itself is not high. Even if it is very stable, it still cannot meet the requirements of industrial applications.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] CaB 3 (X=Br, BrI) specific preparation process of perovskite quantum dot glass

[0030] The total mass is about 10g and the molar percentage is 85SiO 2 , 85B 2 o 3 , 55ZnO, 12Cs2 O. 5PbX 2 and 15NaX raw materials were put into an alumina crucible, covered and put into a muffle furnace and melted at 1200°C for 8 minutes to obtain a uniform glass melt; then, the melt was poured into a brass mold to obtain PG; finally, Heat treatment at 480-580°C for 2 hours to crystallize PG and induce CsPbX 3 In situ growth of CsPbX in glass matrix 3 Quantum dot glass.

[0031] The CsPbX 3 Quantum dot glass is CsPbBr 3 quantum dot glass, the SiO 2 , B 2 o 3 , ZnO, Cs 2 O, PbBr 2 and NaBr in a molar percentage of 85:85:55:12:5:15.

[0032] The CsPbX 3 Quantum dot glass is CsPbBr 1.5 I 1.5 Quantum dot glass, SiO 2 , B 2 o 3 , ZnO, Cs 2 O, PbBr 2 , PbI 2 , NaBr and NaI and the molar percentages are 85:85:55:12:2.5:2.5:7.5:7.5.

Embodiment 2

[0034] A method based on physical dilution to enhance the luminescence quantum yield of perovskite quantum dot glass

[0035] The CsPbBr prepared by the method of embodiment 1 3 Quantum dot glass (CsPbBr 3 @glass) powder crushed and ground to the average particle size of micron level and physically mixed and diluted with polydimethylsiloxane at a weight ratio of 1:3, adding quantum dot glass powder into a beaker with PDMS and stirring until uniform , to obtain a mixed colloidal liquid with a large amount of air bubbles, then inject the mixed colloidal liquid obtained by dilution into a petri dish mold of Φ90 mm polystyrene (PS) material, place it in a vacuum drying oven to vacuumize for 1 hour to remove the air bubbles, After the air bubbles are completely eliminated, turn on the heating switch, heat and cure in a vacuum environment at 80°C for 12 hours, and finally peel off to form CsPbBr 3 Quantum dot-inorganic glass-silica gel triple composite film, the obtained quantum d...

Embodiment 3

[0037] CbBr 3 Specific preparation process of quantum dot-inorganic glass-silica gel composite film

[0038] The CsPbBr prepared by the method of embodiment 1 3 The quantum dot glass powder is pulverized and ground to an average particle size of micron level and physically diluted and mixed with polydimethylsiloxane (PDMS) in a beaker at a weight ratio of 1:256 and stirred until uniform to obtain a mixed gel with a large number of bubbles liquid, and then inject the diluted mixed colloidal liquid into a Φ90 mm polystyrene (PS) petri dish mold, place it in a vacuum drying oven to vacuumize for 1 hour to remove air bubbles, and turn on the heating switch after the air bubbles are completely eliminated. Heat and cure at 80°C for 12 hours in a vacuum environment, and finally peel off to form CsPbBr 3 Quantum dots-inorganic glass-silica gel triple composite film (CsPbBr 3 @glass @PDMS).

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Abstract

The invention discloses a perovskite quantum dot glass film and a preparation method and an application thereof. The PDMS and CsPbX3 quantum dot glass powder are added for simple physical mixing and dilution, the internal filtering effect is eliminated, and the photoluminescence quantum yield of the CsPbX3 quantum dot glass composite material can be greatly improved; and the highest photoluminescence quantum yield obtained by the CsPbBr3 quantum dot glass is 97%. The CsPbX3 quantum dot glass has excellent light stability and water resistance/heat resistance due to effective isolation between the quantum dots and the external environment due to coating of the glass network unit, and the luminous intensity of the CsPbX3 quantum dot-inorganic glass-silica gel composite film is almost unchanged when the CsPbX3 quantum dot-inorganic glass-silica gel composite film is irradiated under a 6W ultraviolet lamp for 7 days and soaked in boiling water at 90 DEG C for 24 hours. A high-performance backlight liquid crystal display is designed by adopting the CsPbX3 quantum dot-inorganic glass-silica gel composite film, the color gamut area of the high-performance backlight liquid crystal display reaches 152% of that of commercial liquid crystal display and 103% of that of the 1953 standard of the national television standard committee (America), and the high-performance backlight liquid crystal display has huge potential in the optoelectronic industry.

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a perovskite quantum dot glass film and a preparation method and application thereof. Background technique [0002] All inorganic CsPbX 3 (X = Cl, Br, I) perovskite quantum dots (PeQDs) have attracted extensive attention in recent years due to their advantages such as facile synthesis, strong fault tolerance, and excellent optical properties. The material has important application prospects in the development of wide color gamut flat panel displays. However, due to the instability and environmental sensitivity of perovskite halide materials, its practical application is seriously affected. Although many process strategies have been developed to stabilize it, none of them can improve its stability to the standard of industrial application. Specifically, the display industry has a stability industry standard called double 85 for the backlight layer material, that is, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/40C08K3/16C08J5/18C09K11/02C09K11/66G02F1/13357
CPCC08J5/18C09K11/025C09K11/665G02F1/1336C08J2383/04C08K3/40C08K3/16
Inventor 林继栋黄烽陈大钦
Owner FUJIAN NORMAL UNIV
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