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Perovskite nano material, preparation method thereof and photoelectric device containing perovskite nano material

A technology of nanomaterials and optoelectronic devices, applied in nano optics, nanotechnology, luminescent materials, etc., can solve the problems of fluorescence half-peak width and other issues, and achieve the effects of narrow fluorescence half-peak width, flexible addition, and simple synthesis method

Active Publication Date: 2020-12-25
NANJING TECH CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The main purpose of the present invention is to provide a perovskite nanomaterial, its preparation method and optoelectronic device containing it, to solve the problem that the fluorescence half-peak width of the perovskite nanomaterial prepared by the existing method is relatively wide

Method used

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  • Perovskite nano material, preparation method thereof and photoelectric device containing perovskite nano material
  • Perovskite nano material, preparation method thereof and photoelectric device containing perovskite nano material
  • Perovskite nano material, preparation method thereof and photoelectric device containing perovskite nano material

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preparation example Construction

[0024] As described in the background art, the perovskite nanomaterials prepared by the existing methods have the problem of wide half width of fluorescence. In order to solve the above-mentioned technical problems, the application provides a preparation method of perovskite nanomaterials, the preparation method comprising: carrying out the first coordination reaction of lead carboxylate, cesium carboxylate and metal halide and non-polar solvent, obtaining a first solution containing perovskite quantum dots; and performing a second coordination reaction between the first solution and ammonium halide in nitrogen and / or an inert atmosphere to obtain perovskite nanomaterials.

[0025] In the presence of a non-polar solvent, lead carboxylate, cesium carboxylate and metal halide undergo the first coordination reaction to obtain the first solution containing perovskite quantum dots; in nitrogen and / or inert atmosphere, in ammonium halide The ammonium ions are combined with the halog...

Embodiment 1

[0043] Cesium lead bromide (CsPbBr 3 ) Synthesis of perovskite nanosheets.

[0044] At room temperature, take 0.4mL of 0.5mmol / mL lead oleate solution, 1mL of 0.2mmol / mL cesium oleate solution, and 5mL of n-octane into a three-necked flask, stir, and control the temperature at 30°C. Exhaust with inert gas for 30 minutes. Inject 3mL of 0.1mmol / mL ZnBr 2 - Oleic acid solution, react for 1 min. Inject 1mL of 3mmol / mL ammonium chloride aqueous solution, react for 20min, and stop the reaction.

Embodiment 2

[0046] Cesium Lead Chloride (CsPbCl 3 ) Synthesis of perovskite nanosheets.

[0047] At room temperature, take 0.4mL of 0.5mmol / mL lead oleate solution, 1mL of 0.2mmol / mL cesium oleate solution, and 5mL of n-octane into a three-necked flask, stir, and control the temperature at 30°C. Exhaust with inert gas for 30 minutes. Inject 3 mL of 0.1 mmol / mL ZnCl 2 - Oleic acid solution, react for 1 min. Inject 1mL of 3mmol / mL ammonium chloride aqueous solution, react for 20min, and stop the reaction.

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Abstract

The invention provides a perovskite nano material, a preparation method thereof and a photoelectric device containing the perovskite nano material. The preparation method comprises the following stepsof carrying out a first coordination reaction on lead carboxylate, cesium carboxylate, a metal halide and a non-polar solvent to obtain a first solution containing perovskite quantum dots, and carrying out a second coordination reaction on the first solution and ammonium halide in a nitrogen and / or inert atmosphere to obtain the perovskite nano material. As ammonium ions are only combined with halogen, ammonium halide has surface selectivity on the surfaces of the quantum dots, and the prepared perovskite nano material has the advantages of narrow fluorescence peak and the like. Compared witha traditional synthesis method, the preparation method also has the advantages of adjustable reaction process, flexible addition of reaction raw materials, simple synthesis method, good experimentalrepeatability and the like.

Description

technical field [0001] The invention relates to the field of quantum dot synthesis, in particular to a perovskite nano material, a preparation method thereof and a photoelectric device containing the same. Background technique [0002] In recent years, due to the optical and physical properties of perovskite quantum dots, such as high photoelectric conversion efficiency and low preparation cost, it has received extensive attention in the fields of solar cells, quantum dot films, light-emitting diodes, and lasers. . Moreover, as a light-emitting material, perovskite quantum dots, compared with traditional inorganic semiconductor quantum dots (such as CdSe, CdS, etc.), by adjusting the element ratio and element type in perovskite quantum dots, perovskite quantum dots are also Can achieve full color gamut coverage. In perovskite quantum dots, compared with traditional organic-inorganic hybrid perovskite quantum dots, all-inorganic perovskite quantum dots have higher ultraviol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66B82Y30/00B82Y20/00
CPCC09K11/025C09K11/665B82Y20/00B82Y30/00
Inventor 周健海朱晓艳
Owner NANJING TECH CORP LTD
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