Perovskite composite luminescent material as well as preparation method, product and application thereof

A luminescent material and perovskite technology, applied in luminescent materials, chemical instruments and methods, semiconductor devices, etc., can solve problems such as damage to the health of synthesizers, high fluorescence intensity and color gamut, narrow emission peak width, etc., to save Raw materials, simple operation, and the effect of narrow half-peak width

Pending Publication Date: 2020-11-20
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the colloidal synthesis method occupies a dominant position in the preparation of perovskite nanocrystals. The advantages and disadvantages of this method are obvious: the controllable growth process is easy to obtain nanoparticles with uniform particle size distribution, so that the nanocrystals have a narrow emission peak width. , high fluorescence intensity and color gamut; however, a large amount of toxic organic solvents are used in the synthesis and purification process, and a large amount of organic waste liquid is generated, which not only damages the health of the synthesis personnel but also causes serious environmental problems. Therefore, from an environmental point of view, colloids Synthesis is not the green way
As an alternative to colloidal synthesis, template synthesis eliminates subsequent purification steps and greatly reduces the use of toxic solvents. However, the use of organic solvents is still unavoidable
In recent years, some researchers have prepared perovskite nanocrystals from top to bottom by mechanical grinding, which can avoid the use of organic solvents. However, in order to obtain high quantum efficiency products, organic ligands such as oleic acid and oleylamine are still needed to inhibit Nanocrystals aggregate and grow, and this method has high requirements for equipment

Method used

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  • Perovskite composite luminescent material as well as preparation method, product and application thereof
  • Perovskite composite luminescent material as well as preparation method, product and application thereof
  • Perovskite composite luminescent material as well as preparation method, product and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1CsPbBr 3 / SrBr 2 Preparation of composite luminescent materials

[0059] (1) 63.9mg (0.3mmol) CsBr, 110.1mg (0.3mmol) PbBr 2 and 2.133g (6mmol) SrBr 2 ·6H 2 O raw materials are loaded into a planetary ball mill, fully ball milled to mix the raw materials evenly;

[0060] (2) Spread the homogeneous mixture obtained in step (1) in an alumina crucible, place it in a tube furnace and calcinate at 800° C. for 10 minutes under a nitrogen atmosphere to form a uniform molten liquid;

[0061] (3) After the product of step (2) is cooled to room temperature, it is placed in a planetary ball mill for grinding, so that the particle size of the obtained material is less than 80 μm, which is CsPbBr 3 / SrBr 2 Composite luminescent materials.

[0062] To the CsPbBr that embodiment 1 makes 3 / SrBr 2 Composite luminescent materials were tested for TEM and optical properties.

[0063] figure 1 For the preparation of CsPbBr 3 / SrBr 2 TEM image of the composite luminesc...

Embodiment 2

[0066] Example 2CsPbBr 3 / SrBr 2 Preparation of composite luminescent materials

[0067] (1) 63.9mg (0.3mmol) CsBr, 110.1mg (0.3mmol) PbBr 2 and 2.133g (6mmol) SrBr 2 ·6H 2 O raw materials are loaded into a planetary ball mill, fully ball milled to mix the raw materials evenly;

[0068] (2) Spread the homogeneous mixture obtained in step (1) in an alumina crucible, place it in a tube furnace and calcinate at 650° C. for 60 minutes under a nitrogen atmosphere to form a uniform molten liquid;

[0069] (3) After the product of step (2) is cooled to room temperature, it is placed in a planetary ball mill for grinding, so that the particle size of the obtained material is less than 80 μm, which is CsPbBr 3 / SrBr 2 Composite luminescent materials.

Embodiment 3

[0070] Example 3CsPbBr 3 / SrBr 2 Preparation of composite luminescent materials

[0071] (1) 425.6mg (2mmol) CsBr, 734mg (2mmol) PbBr 2 and 711 mg (2 mmol) SrBr 2 ·6H 2 O raw materials are loaded into a planetary ball mill, fully ball milled to mix the raw materials evenly;

[0072] (2) Spread the homogeneous mixture obtained in step (1) in an alumina crucible, place it in a tube furnace and calcinate at 950° C. for 10 minutes under a nitrogen atmosphere to form a uniform molten liquid;

[0073] (3) After the product of step (2) is cooled to room temperature, it is placed in a planetary ball mill for grinding, so that the particle size of the obtained material is less than 80 μm, which is CsPbBr 3 / SrBr 2 Composite luminescent materials.

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Abstract

The invention belongs to the technical field of luminescent materials, and particularly relates to a perovskite composite luminescent material and a preparation method, a prepared product and application thereof. Wherein the perovskite composite luminescent material comprises perovskite nanocrystals and metal halides, the metal halides are carriers of the perovskite nanocrystals, the perovskite nanocrystals are embedded in the metal halides, and the molar ratio of the perovskite nanocrystals to the metal halides is 1: 0.1-100. The preparation method of the perovskite composite luminescent material comprises the following steps: carrying out solid-phase mixing on a perovskite precursor and a metal halide according to a molar ratio of 1: (0.1-100); and melting the solid-phase mixture at 650-1000 DEG C for 10-60 minutes, cooling to crystallize, and grinding until the particle size is less than 80 mu m, thereby obtaining the perovskite composite luminescent material. Different from the prior art, the method provided by the invention has the characteristics of simple synthesis process, low cost, no solvent and the like, and the prepared luminescent material has high luminescent intensity and high luminescent color purity, and can be widely applied to photoluminescent devices, lasers and nonlinear optical devices.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a perovskite composite luminescent material, a preparation method, a prepared product and an application thereof. Background technique [0002] In recent years, perovskite nanocrystals have attracted the great attention of many researchers due to their superior photoelectric properties, becoming a new research hotspot, and showing great application potential in the fields of solar cells, LEDs and lasers. [0003] Compared with traditional quantum dots, perovskite nanocrystals belong to ionic crystals, have the advantages of low formation energy and high defect tolerance, and many synthesis methods have been developed based on the above characteristics. At present, the colloidal synthesis method occupies a dominant position in the preparation of perovskite nanocrystals. The advantages and disadvantages of this method are obvious: the controllable growth p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66H01L33/50
CPCC09K11/665H01L33/504H01L2933/0041
Inventor 李良汪波
Owner SHANGHAI JIAO TONG UNIV
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