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Method for improving stability of red fluorescence organic-inorganic hybrid perovskite structure MAPbI3 quantum dots

A technology with perovskite structure and red fluorescence, which is applied in the preparation of organic compounds, organic chemistry, chemical instruments and methods, etc., to achieve the effects of simple process, improved stability and low production cost

Inactive Publication Date: 2020-02-11
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there has been no report of Eu 2+ , Mn 2+ Co-doped organic-inorganic hybrid perovskite structure MAPbI 3 Synthetic method of quantum dots, thereby improving the stability of quantum dots

Method used

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  • Method for improving stability of red fluorescence organic-inorganic hybrid perovskite structure MAPbI3 quantum dots
  • Method for improving stability of red fluorescence organic-inorganic hybrid perovskite structure MAPbI3 quantum dots
  • Method for improving stability of red fluorescence organic-inorganic hybrid perovskite structure MAPbI3 quantum dots

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Experimental program
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Effect test

Embodiment 1

[0059] combine Figure 1-3 Illustrative Example 1

[0060] mn 2+ Doped organic-inorganic hybrid perovskite structure MAPbI 3 Preparation of red fluorescent quantum dots:

[0061] Step 1, take 0.08mmol methylammonium iodide, 0.072mmol lead iodide, dissolve in 1mL DMF, obtain the first solution;

[0062] Step 2. Take 1 mL of oleic acid and 0.1 mL of oleylamine and dissolve them in 1 mL of toluene to obtain the second solution;

[0063] Step 3, take 0.08mmol MnI 2 , was dissolved in 1 mL of DMF to obtain a third solution;

[0064] Step 4. Mix 0.1mL of the first solution with 0.01mL of the third solution and 0.017mL of the second solution to obtain the fourth solution;

[0065] Step 5, slowly drop the fourth solution obtained in step 4 into 2 mL of toluene that was stirred, centrifuge the obtained mixed solution for 10 min at a speed of 14000 rpm, discard the supernatant, wash with a small amount of toluene, redisperse in 2 mL of toluene, and prepare Get Mn 2+ Doped organi...

Embodiment 2

[0071] combine Figure 4-6 Illustrative Example 2

[0072] Eu 2+ Doped organic-inorganic hybrid perovskite structure MAPbI 3 Preparation of red fluorescent quantum dots:

[0073] Step 1, take 0.08mmol methylammonium iodide, 0.072mmol lead iodide, dissolve in 1mL DMF, obtain the first solution;

[0074] Step 2. Take 1 mL of oleic acid and 0.1 mL of oleylamine and dissolve them in 1 mL of toluene to obtain the second solution;

[0075] Step 3, take 0.08mmol EuI 2 , was dissolved in 1 mL of DMF to obtain a third solution;

[0076] Step 4. Mix 0.1mL of the first solution with 0.01mL of the third solution and 0.017mL of the second solution to obtain the fourth solution;

[0077] Step 5, slowly drop the fourth solution obtained in step 4 into 2 mL of toluene that was stirred, centrifuge the obtained mixed solution for 10 min at a speed of 14000 rpm, discard the supernatant, wash with a small amount of toluene, redisperse in 2 mL of toluene, and prepare Get Eu 2+ Doped organi...

Embodiment 3

[0083] combine Figure 7-8 Illustrative Example 3

[0084] Eu of the present invention 2+ , Mn 2+ Co-doped organic-inorganic hybrid perovskite structure MAPbI 3 Preparation of red fluorescent quantum dot solution:

[0085] Step 1, take 0.08mmol methylammonium iodide, 0.072mmol lead iodide, dissolve in 1mL DMF, obtain the first solution;

[0086] Step 2. Take 1 mL of oleic acid and 0.1 mL of oleylamine and dissolve them in 1 mL of toluene to obtain the second solution;

[0087] Step 3, take 0.08mmoL EuI 2 and 0.08mmoL Mn I 2 , was dissolved in 1 mL of DMF to obtain a third solution;

[0088] Step 4. Mix 0.1mL of the first solution with 0.005mL of the third solution and 0.017mL of the second solution to obtain the fourth solution;

[0089] Step 5, slowly drop the fourth solution obtained in step 4 into 2 mL of toluene that was stirred, centrifuge the obtained mixed solution for 10 min at a speed of 14000 rpm, discard the supernatant, wash with a small amount of toluene, ...

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Abstract

The invention relates to a method for improving the stability of red fluorescence organic-inorganic hybrid perovskite structure MAPbI3 quantum dots, and belongs to the field of nano-material science.The stable and efficient organic-inorganic hybrid perovskite structure MAPbI3 quantum dots are synthesized in one step through a coprecipitation process at room temperature by using methylammonium iodide (CH3NH3I3) and lead iodide (PbI2) as raw materials, oleic acid and oleylamine as ligands and europium iodide (EuI2) and manganese iodide (MnI2) as dopants. Codoping with manganese and europium ions improves the stability of the quantum dots and ensures the high fluorescence quantum efficiency of the quantum dots; and undoped quantum dots are almost completely quenched after standing for about33 h, but the fluorescence efficiency of the Eu<2+> and Mn<2+> codoped perovskite quantum dots is still 65%, so the stability is greatly improved.

Description

technical field [0001] The invention belongs to the field of nanometer material science, in particular to a 2+ , Mn 2+ Co-doped organic-inorganic hybrid perovskite structure MAPbI 3 A synthesis method of quantum dots, thereby improving the stability of quantum dots. Background technique [0002] Semiconductor quantum dots are widely used in light-emitting diodes, solar cells, photodetectors and other fields due to their unique photoelectric properties. However, the commonly used cadmium-based quantum dots are limited in their application due to their high toxicity and complex synthesis process. In recent years, a new type of ABX 3 Perovskite quantum dots have attracted people's attention due to their high quantum efficiency, narrow emission spectrum, continuously adjustable emission wavelength with the change of composition, and simple synthesis process. At present, perovskite quantum dots have broad application prospects in lighting and display fields. [0003] But th...

Claims

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Application Information

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IPC IPC(8): C09K11/06C07C211/04C07C209/00B82Y20/00B82Y30/00
CPCB82Y20/00B82Y30/00C07C209/00C07C211/04C09K11/06
Inventor 范翊郭晓阳吕营李颜涛胡永生刘星元
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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