A preparation method of strongly stable dendritic box-like bromide perovskite quantum dots

A strong stability, bromide technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of poor stability of perovskite quantum dots and harsh preparation environment, and achieve easy promotion, high fluorescence efficiency, and simple equipment. Effect

Active Publication Date: 2019-07-30
SOUTHEAST UNIV
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  • Application Information

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Problems solved by technology

[0003] Technical problem: The object of the present invention is to provide a method for preparing strongly stable dendritic box-like bromide perovskite quantum dots, so as to solve the shortcomings of traditional perovskite quantum dots such as poor stability and harsh preparation environment

Method used

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  • A preparation method of strongly stable dendritic box-like bromide perovskite quantum dots
  • A preparation method of strongly stable dendritic box-like bromide perovskite quantum dots
  • A preparation method of strongly stable dendritic box-like bromide perovskite quantum dots

Examples

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example 1

[0022] Preparation of PAMAM-CH 3 NH 3 PbBr 3 Quantum dots, comprising the steps of:

[0023] 1) Dissolve 1 g of PAMAM in 4 ml of dimethylformamide and heat it ultrasonically for 5 to 10 minutes to prepare a 0.00025 to 0.00030 mol / L PAMAM solution.

[0024] 2) 1.6mmol of CH 3 NH 3 Cl, 2.0mmol of PbCl 2 , 15mmol of KBr, 180-200uL of n-octylamine, 0.9ml of PAMAM solution, and 100ml of dimethylformamide were mixed evenly to obtain a mixed solution;

[0025] 3) Put the mixed solution obtained in step 2 into an ultrasonic cleaning machine and sonicate for 6-8 hours to obtain the required precursor solution;

[0026] 4) Use a pipette gun to extract 80-120uL of the precursor solution obtained in step 3, and drop it into 4-6ml of toluene to form PAMAM-CH 3 NH 3 PbBr 3 quantum dots.

example 2

[0028] Preparation of PAMAM-CH 3 NH 3 PbBr 3 Quantum dots, comprising the steps of:

[0029] 1) Dissolve 1 g of PAMAM in 4 ml of dimethylformamide and heat it ultrasonically for 5 to 10 minutes to prepare a 0.00025 to 0.00030 mol / L PAMAM solution.

[0030] 2) Add 1.7mmol of CH 3 NH 3 Cl, 2.1 mmol of PbCl 2 , 16mmol of KBr, 180-200uL of n-octylamine, 1.0ml of PAMAM solution, and 110ml of dimethylformamide were mixed evenly to obtain a mixed solution;

[0031] 3) Put the mixed solution obtained in step 2 into an ultrasonic cleaning machine and sonicate for 6-8 hours to obtain the required precursor solution;

[0032] 4) Use a pipette gun to extract 80-120uL of the precursor solution obtained in step 3, and add it dropwise to 4-6ml of toluene to form PAMAM-CH 3 NH 3 PbBr 3 quantum dots.

example 3

[0034] Preparation of PAMAM-CH 3 NH 3 PbBr 3 Quantum dots, comprising the steps of:

[0035] 1) Dissolve 1 g of PAMAM in 4 ml of dimethylformamide and heat it ultrasonically for 5 to 10 minutes to prepare a 0.00025 to 0.00030 mol / L PAMAM solution.

[0036] 2) Add 1.8mmol of CH 3 NH 3 Cl, 2.2mmol of PbCl 2 , 18mmol of KBr, 180-200uL of n-octylamine, 1.1ml of PAMAM solution, and 120ml of dimethylformamide were mixed evenly to obtain a mixed solution;

[0037] 3) Put the mixed solution obtained in step 2 into an ultrasonic cleaning machine and sonicate for 6-8 hours to obtain the required precursor solution;

[0038] 4) Use a pipette gun to extract 80-120uL of the precursor solution obtained in step 3, and drop it into 4-6ml of toluene to form PAMAM-CH 3 NH 3 PbBr 3 quantum dots.

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Abstract

The invention discloses a preparation method of a highly stable branch dendritic bromide perovskite quantum dot. The above quantum dot material is CH3NH3PbBr3 wrapped with polyamidoamine dendrimer (PAMAM), and the structural formula of the quantum dot material is PAMAM-CH3NH3PbBr3. The preparation method comprises the following steps: (1) adopting the PAMAM with a carboxyl functional group and n-octylamine as ligands to realize the assisted preparation of a PAMAM-CH3NH3PbBr3 precursor solution; and (2) transferring the precursor solution into toluene, and uniformly shaking the precursor solution and the toluene to form the PAMAM-CH3NH3PbBr3 quantum dot. The method for preparing the perovskite quantum dot through a one-pot technology has the advantages of simplicity, easiness in operation, convenience in raw material supply, completion in general laboratories, and easiness in promotion.

Description

technical field [0001] The invention relates to a preparation technology of a dendritic box-shaped bromide perovskite quantum dot material with strong stability, and belongs to the technical field of quantum dot luminescent material control. Background technique [0002] Due to the advantages of narrow luminescence peak and high fluorescence efficiency, perovskite quantum dots can be widely used in solar cells, LEDs and other fields, and have become a hot spot in the field of quantum dot luminescent materials. At present, the biggest defect of perovskite quantum dots is their poor stability, which is easily affected by environmental factors such as humidity and light, and the storage environment is relatively harsh, which is not conducive to promotion. Therefore, it is particularly important to prepare a perovskite quantum dot with strong stability. Contents of the invention [0003] Technical problem: The purpose of the present invention is to provide a method for prepar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/06
CPCC09K11/02C09K11/06
Inventor 王春雷徐意仁徐淑宏崔一平
Owner SOUTHEAST UNIV
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