Perovskite quantum dot and metal organic framework composite luminescent material and preparation method and application thereof

A metal-organic framework and luminescent material technology, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as reducing the size of perovskite, and achieve the effect of improving stability and improving optical performance

Active Publication Date: 2021-08-03
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the problem that surfactants must be used to reduce the size of perovskite when preparing perovskite quantum dots and metal organic framework composite materials

Method used

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  • Perovskite quantum dot and metal organic framework composite luminescent material and preparation method and application thereof
  • Perovskite quantum dot and metal organic framework composite luminescent material and preparation method and application thereof
  • Perovskite quantum dot and metal organic framework composite luminescent material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A preparation method of a perovskite quantum dot and metal organic framework composite material, comprising the following steps:

[0036] Weigh the raw material PbBr according to the molar ratio 1:1:0.3:0.3 2 , CsBr, ZnO and 2-methylimidazole, mix the raw materials into a mortar, and grind at room temperature for 30 minutes at a speed of 200r / min to obtain CsPbBr with a perovskite molar percentage of 30%. 3 @ZIF-8 Composite.

Embodiment 2

[0038] The difference between this example and Example 1 is that the molar ratio of the raw materials in this example is 1:1:0.15:0.15, and CsPbBr with a perovskite molar percentage of 15% is obtained. 3 @ZIF-8 Composite.

Embodiment 3

[0040] The difference between this example and Example 1 is that the molar ratio of the raw materials in this example is 1:1:0.1:0.1, and the CsPbBr with a perovskite molar percentage of 10% is obtained. 3 @ZIF-8 Composite.

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Abstract

The invention discloses a perovskite quantum dot and metal organic framework composite luminescent material as well as a preparation method and application thereof. The method comprises the following steps: mixing lead halide, cesium halide, an imidazole ligand and a central metal atom compound, and conducting grinding for 5-50 minutes to obtain the perovskite quantum dot and metal organic framework composite luminescent material, wherein the central metal atom compound is one or more of zinc oxide, cobalt hydroxide or zinc acetate. The perovskite quantum dot and metal organic framework composite luminescent material is synthesized in one step through mechanical grinding, and the problem that in the prior art, a surfactant needs to be used for reducing the size of perovskite is solved. The method disclosed by the invention is green and environment-friendly, and the optical performance of the composite material is also improved while the stability of the perovskite quantum dots is improved.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, more specifically, to a composite luminescent material of perovskite quantum dots and metal-organic frameworks and its preparation method and application. Background technique [0002] All-inorganic perovskite quantum dots have the advantages of suitable energy band structure, good visible light response, high quantum yield, short carrier lifetime, narrow tunable emission, and simple preparation, so they are used in solar cells, LEDs, and nanolasers. Device preparation has broad application prospects. Although all-inorganic perovskites have higher stability than organic perovskites, their crystals are still vulnerable to damage in the presence of light, heat, water, and oxygen, so further improvements in their stability are still needed. At present, the stability of perovskite is mainly improved by wrapping inorganic materials outside perovskite or embedding perovskite in porous ma...

Claims

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Application Information

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IPC IPC(8): C09K11/66C09K11/02
CPCC09K11/665C09K11/025Y02E10/549
Inventor 罗劭娟冯斯桐吴传德陆凤连付志滨吴思洁王飞李泽宇
Owner GUANGDONG UNIV OF TECH
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