Preparation method of total-inorganic perovskite quantum dots

A technology of inorganic calcium and quantum dots, which is applied in chemical instruments and methods, nanotechnology, nano-optics, etc., can solve the problem that the ratio of elements cannot be adjusted, achieve high repetition rate, facilitate mass production, and expand sources.

Inactive Publication Date: 2018-06-22
HEBEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a preparation method for all-inorganic perovskite quantum dots, adopting a one-pot method, without first preparing the precursor of the cesium source, dissolving the required amount of lead source and cesium source with ligands In the organic solvent, after vacuum drying, inject the halogen source at the set temperature. At this time, the three elements of Pb, Cs and halogen X will interact and precipitate CsPbX 3 The all

Method used

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  • Preparation method of total-inorganic perovskite quantum dots
  • Preparation method of total-inorganic perovskite quantum dots
  • Preparation method of total-inorganic perovskite quantum dots

Examples

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Embodiment 1

[0029] In the first step, the Cs:Pb molar ratio is =1:1.3 cesium source and lead source of the required amount, that is, 0.1g lead stearate and 0.0163g cesium carbonate, are added to the three-necked bottle, dissolved in 10mL of ten Add ligands 0.5mL oleylamine and 0.5mL oleic acid to the octacene, vacuumize and change nitrogen three times at room temperature, the vacuum degree of each vacuum is 0.1kPa, and then turn to the vacuum condition with a vacuum degree of 0.1kPa, Heat to 120°C, maintain for 1h, and dry;

[0030] In the second step, the dried reaction solution obtained in the first step above is changed to nitrogen, and the temperature is raised to 180 ° C, and then 0.04 mL of trimethylbromosilane TMSBr is injected, and after 5 seconds of reaction, the temperature is lowered in an ice-water bath. stop responding;

[0031] In the third step, add 5 mL of precipitating agent ethyl acetate to the reaction liquid obtained in the above second step, centrifuge with a centrif...

Embodiment 2

[0038] Except that in the first step, the lead source lead stearate used is changed into lead nitrate, and quality is 0.043g, other is with embodiment 1.

Embodiment 3

[0040] Except that in the second step, the dried reaction solution obtained in the above first step was changed to nitrogen condition, and the temperature was raised to 140° C., the others were the same as in Example 1.

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Abstract

The invention provides a preparation method of total-inorganic perovskite quantum dots, and relates to inorganic luminescent materials. The one-pot method is used, a precursor of a caesium source doesnot need to be prepared in advance, a required quantity of lead source and caesium source are dissolved in an organic solvent by using ligand, after vacuum drying, a halogen source is injected undera set temperature, at this moment, the three elements of Pb, Cs and halogen X can interact, and the CsPbX3 total-inorganic perovskite quantum dots are deposited. The three disadvantages of complex steps in the prior art are overcome that reagent sources are limited, wherein the reagents of the room temperature preparation method are caesium halide and lead halide, the reagents of the high temperature preparation method are caesium carbonate and lead halide, and it cannot be anything but the two substances to react; the amount ratio of the elements cannot be adjusted, that is, the amount ratioof Pb and halogen X is limited by a lead halide reactant; the precursor needs to be prepared and preheated in advance.

Description

technical field [0001] The technical proposal of the present invention relates to an inorganic luminescent material, specifically a method for preparing an all-inorganic perovskite quantum dot. Background technique [0002] Quantum dot light-emitting diodes are widely used in large-size and flexible displays. In recent years, they have attracted widespread attention and become one of the research hotspots at home and abroad, as well as one of the directions of national science and technology development. The half width of quantum dots is very narrow (10-30nm), and the luminous efficiency is high. The luminous peak position of quantum dots can also be obtained by adjusting the size, which has unique performance advantages and high application value. [0003] At present, the quantum dots commonly used in lighting and display fields are CdSe quantum dots. Although their luminous efficiency and stability are very good, their preparation steps are very cumbersome and require comp...

Claims

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Application Information

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IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665
Inventor 孙春毕文刚徐庶耿翀郜志媛刘晗欣
Owner HEBEI UNIV OF TECH
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