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Preparation methods for organic-inorganic hybridized perovskite quantum dots and thin film

A technology of perovskite and quantum dots, which is applied in the field of preparation of luminescent materials, can solve the problems of low luminous efficiency of quantum dots, achieve high luminous efficiency, simple and feasible preparation method, and easy large-scale production

Inactive Publication Date: 2018-10-23
INNER MONGOLIA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a macro-preparation method of organic-inorganic hybrid perovskite quantum dots, which uses short-chain organic amine halide acids as surface coating agents to synthesize a variety of hybrid perovskite quantum dots. Quantum dots with perovskite structure, this method is simple and feasible, and solves the problem of low luminous efficiency of quantum dots obtained by existing methods

Method used

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  • Preparation methods for organic-inorganic hybridized perovskite quantum dots and thin film
  • Preparation methods for organic-inorganic hybridized perovskite quantum dots and thin film
  • Preparation methods for organic-inorganic hybridized perovskite quantum dots and thin film

Examples

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Effect test

Embodiment 1

[0045] This example uses butylamine hydrobromic acid as a surface coating agent to prepare CH 3 NH 3 PbBr 3 Quantum dots, the specific steps are:

[0046] 1. Preparation of methylamine bromide

[0047]Drop 5mL of methylamine ethanol solution with a mass fraction of 40% (purity>99.9%) into a beaker containing 20mL of ethanol solution, stir for 10 minutes until uniform, and add to the above solution while stirring in an ice-water bath environment Mass fraction is 5mL of hydrobromic acid of 49%, under ice-water bath environment, continue to stir 0.5 hour, obtain clear solution; Then continue to stir 3h on the heating stirring table of 50 degrees Celsius, remove solvent; Wash with water and ether three times, filter with suction, and dry in a vacuum oven at room temperature under a pressure of -0.1MPa for 4 hours to obtain methylamine bromide powder;

[0048] 2. Preparation of butylamine hydrobromide

[0049] Drop 5mL of butylamine (purity>99.9%) into a beaker containing 20mL...

Embodiment 2

[0057] This example uses propylamine hydrochloric acid as the surface coating agent to prepare CH 3 NH 3 PbCl 3 Quantum dots, the specific steps are:

[0058] 1. Preparation of Methylamine Chloride

[0059] Drop 5mL of methylamine ethanol solution with a mass fraction of 40% (purity>99.9%) into a beaker containing 20mL of ethanol solution, stir for 10 minutes until uniform, and add to the above solution while stirring in an ice-water bath environment Concentrated hydrochloric acid 5mL with a mass fraction of 37% was continuously stirred for 2 hours in an ice-water bath environment to obtain a clear solution; then continued to stir for 3 hours on a heating and stirring table at 50 degrees to remove the solvent; the product remaining at the bottom of the beaker was washed with anhydrous Wash with diethyl ether three times, filter with suction, and dry in a vacuum oven at room temperature under a pressure of -0.1MPa for 4 hours to obtain methylamine chloride powder;

[0060] ...

Embodiment 3

[0069] This example uses ethylamine hydrobromic acid as a surface coating agent to prepare CH 3 NH 2 SnBr 3 Quantum dots, the specific steps are:

[0070] 1. Preparation of methylamine bromide

[0071] The preparation method of methylamine bromide is described with embodiment 2 step 1;

[0072] 2. Preparation of ethylamine hydrobromide

[0073] Drop 5 mL of ethylamine solution (purity >99.9%) with a mass fraction of 70% into a beaker containing 20 mL of ethanol solution, stir for 10 minutes until uniform, and add mass to the above solution while stirring in an ice-water bath environment. Fraction is 49% hydrobromic acid 7mL, under ice-water bath environment, continue to stir for 0.5 hour, obtain clear solution; Continue to stir 3h on the heating stirring platform of 50 degree then, remove solvent; Wash with diethyl ether three times, filter with suction, and dry in a vacuum oven at room temperature under a pressure of -0.1MPa for 4 hours to obtain ethylamine hydrobromic a...

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Abstract

The invention relates to a preparation method of luminescent materials and particularly relates to a preparation method for organic-inorganic hybridized perovskite quantum dots. The method includes steps of: 1) dissolving organic amine in anhydrous ethanol with stirring, and dropwise adding haloid acid to the solution, washing the organic amine haloid acid thick liquid with ethyl ether, and filtering and drying the liquid to obtain organic amine haloid acid powder; 2) mixing inorganic halide salt with the organic amine haloid acid powder at molar ratio of 1:1-3, and adding short-chain organicamine haloid acid; 3) quickly stirring a second solvent on a magnetic stirrer, and at the same time, dropwise adding the precursor solution into the second solvent by a microsyringe with stirring, andcontinuously stirring the mixture to obtain an organic-inorganic hybridized perovskite quantum dot solution. In the invention, the short-chain amine haloid acid, instead of conventional long-chain amine or long-chain acid as a surface coating agent for the nano-particles, is used for synthesizing the quantum dots in various hybridized perovskite structures as the surface coating agent. The preparation method is simple and available. The quantum dots are high in luminous efficiency, and can be produced in a large scale.

Description

technical field [0001] The invention relates to a method for preparing a luminescent material, in particular to a method for macro-preparing organic-inorganic hybrid perovskite quantum dots and thin films. Background technique [0002] Organic-inorganic hybrid perovskite structure materials combine the advantages of organic materials and inorganic materials, showing their unique optoelectronic properties, such as: high light absorption coefficient, large carrier concentration, strong luminous intensity, luminescence The color is pure. By adjusting the composition of perovskite materials, its band gap and the luminous color of nanoparticles can be changed. Based on these, organic-inorganic hybrid perovskite structure materials have broad application prospects in solar cells, light-emitting diodes, detectors, etc. . At the same time, this type of material is also a current research hotspot. [0003] At present, a large number of literatures have reported the preparation met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/06H01L51/56C07C209/00C07C211/04
CPCC09K11/02C09K11/06C07C209/00H10K85/60H10K71/00C07C211/04Y02B20/00
Inventor 杨艳春陈瑞兰田晓
Owner INNER MONGOLIA NORMAL UNIVERSITY
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