Fluorescent material based on organic and inorganic hybrid perovskite quantum dots and preparation method of fluorescent material

A technology of fluorescent materials and quantum dots, applied in the direction of luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problem of easy decomposition and limit the industrial application of organic-inorganic hybrid perovskite quantum dots , poor stability of quantum dots, etc., to achieve good performance

Active Publication Date: 2018-08-24
MINZU UNIVERSITY OF CHINA
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Problems solved by technology

However, the quantum dots prepared by the method reported in the literature above have poor stability and are easily decomposed when exposed to water, which greatly limits the industrial application of organic-inorganic hybrid perovskite quantum dots.

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  • Fluorescent material based on organic and inorganic hybrid perovskite quantum dots and preparation method of fluorescent material
  • Fluorescent material based on organic and inorganic hybrid perovskite quantum dots and preparation method of fluorescent material
  • Fluorescent material based on organic and inorganic hybrid perovskite quantum dots and preparation method of fluorescent material

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preparation example Construction

[0039] The invention provides a method for preparing a fluorescent material based on organic-inorganic hybrid perovskite quantum dots, comprising: A) mixing silica sol, a first organic amine compound and organic-inorganic hybrid perovskite quantum dots, drying Then get the fluorescent material.

[0040] The present invention uses silica sol to coat organic-inorganic hybrid perovskite quantum dots, and adds organic amine compounds to the silica sol to inhibit the decomposition of quantum dots in the sol-gel conversion process, so as to realize the quantum dots in silica Doping in glass, due to the dual effects of silica and organic amine compounds, can greatly improve the light, heat, water, and oxygen stability of fluorescent materials, thereby improving its feasibility in practical applications.

[0041] Among them, the present invention has no special limitation on the sources of all raw materials, which can be commercially available.

[0042]The silica sol can be silica so...

Embodiment 1

[0058] 1.1 Add 0.1mmol PbBr 2 , 0.2 mmol CH 3 NH 3 Br and 0.2mmol APTS were miscible in DMF, and the resulting mixed solution was injected into rapidly stirring toluene to produce precipitation, and a solution sample of organic-inorganic hybrid perovskite quantum dots was obtained.

[0059] 1.2 Mix 3mL ethanol, 3mL tetraethyl orthosilicate (TEOS), 3mL water, and 20μL acetic acid, mix well and let stand for one day, then add 0.01mmol CH 3 NH 3 Br was dissolved in 20 μL of water and injected into the above mixed solution to obtain the desired silica sol.

[0060] 1.3 Stir the solution sample of perovskite quantum dots obtained in 1.1 for 12h, then centrifuge (2500rpm, 5min), redisperse the solid obtained by centrifugation into 2mL of ethanol, inject it into the silica sol obtained in 1.2, and pass through 85 After drying at ℃ for 120 hours, the perovskite quantum dot-doped silica gel is obtained, which is a block solid, and then ground to form a quantum dot phosphor, which i...

Embodiment 2

[0069] 2.1 Add 0.1mmol PbBr 2 , 0.2 mmol CH 3 NH 3 Br and 0.2mmol APTS were miscible in DMF, and the resulting mixed solution was injected into rapidly stirring toluene to produce precipitation, and a solution sample of organic-inorganic hybrid perovskite quantum dots was obtained.

[0070] 2.2 Mix 3mL ethanol, 3mL tetraethyl orthosilicate (TEOS), 3mL water, and 20μL acetic acid, mix well and let stand for one day, then add 0.005mmol CH 3 NH 3 Br was dissolved in 20 μL of water and injected into the above mixed solution to obtain the desired silica sol.

[0071] 2.3 Stir the solution sample of perovskite quantum dots obtained in 2.1 for 12 hours, then centrifuge (2500rpm, 5min), redisperse the solid obtained by centrifugation into 2mL of ethanol, inject it into the silica sol obtained in 2.2, and pass through 85 After drying at ℃ for 120 hours, the perovskite quantum dot-doped silica gel is obtained, which is a block solid, and then ground to form a quantum dot phosphor, w...

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Abstract

The invention provides a preparation method of a fluorescent material based on organic and inorganic hybrid perovskite quantum dots. The preparation method comprises the following steps: A) mixing silica sol, a first organic amines compound and organic and inorganic hybrid perovskite quantum dots, and drying the mixture to obtain the fluorescent material. Compared with the prior art, the preparation method of the fluorescent material based on organic and inorganic hybrid perovskite quantum dots has the advantages that the silica sol is used for wrapping the organic and inorganic hybrid perovskite quantum dots, the organic amines compound is added in the silica sol to inhibit decomposition of the quantum dots in a sol-gel conversion process, doping of the quantum dots in silicon dioxide glass is realized, due to double effects of silicon dioxide and the organic amines compound, light, thermal, water and oxygen stability of the fluorescent material can be greatly improved, and thus, thefeasibility of the fluorescent material in actual application is improved.

Description

technical field [0001] The invention belongs to the technical field of perovskite quantum dots, in particular to a fluorescent material based on organic-inorganic hybrid perovskite quantum dots and a preparation method thereof. Background technique [0002] Quantum dots can also be called nanocrystals, which are composed of a limited number of atoms and aggregates of atoms and molecules whose three dimensions are on the order of nanometers. The movement of internal electrons in all directions is restricted, so its quantum dots The domain effect is particularly pronounced. Based on quantum effects, quantum dots have broad application prospects in the fields of solar cells, light-emitting devices, and optical biomarkers. Among the various quantum dots, perovskite-based quantum dots have attracted great attention due to their excellent luminescent properties, such as high luminous efficiency and narrow emission lines. The perovskite structure is in the form of cubic crystals,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/59B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C09K11/06C09K11/592C09K2211/188
Inventor 彭洪尚曾凡龙
Owner MINZU UNIVERSITY OF CHINA
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