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Manufacturing of manganese-ion doped cesium lead chloride high-stability perovskite quantum dot white light-emitting diode inlaid in zeolite

A high-stability, white light-emitting technology, applied in luminescent materials, electrical components, circuits, etc., can solve problems such as reducing stability and reducing the luminous efficiency of perovskite quantum dots and other optical properties.

Inactive Publication Date: 2019-12-31
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these two methods, the use of polymer / inorganic materials for coating to isolate oxygen and moisture does not even reduce the optical properties of perovskite quantum dots such as luminous efficiency; while Mn 2+ Plasma-doped perovskite quantum dots will make Mn 2+ Plasma precipitates out of perovskite, reducing its stability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: A preferred specific implementation case of the present invention. The steps are as follows:

[0024] 1) First, 2.337gNaAlO 2 Add 8mL of 1.25mol / L NaOH solution, use a magnetic stirrer to stir at 300rpm for 1h to prepare the first solution;

[0025] 2) Dissolve 9.845 g of silica sol (HS-4015) in 3.62 mL of distilled water, and use a magnetic stirrer to stir at 200 rpm for 1 hour to prepare a second solution;

[0026] 3) After the first and second solutions are stirred for 1 hour, the first solution is slowly added dropwise to the second solution at a rate of 10 mL / h. During this process, the second solution is continuously stirred at 300 rpm using a magnetic stirrer. After the addition, continue to stir at the same stirring rate for 5 hours to obtain the third solution;

[0027] 4) Put the third solution in a 100 mL flask, and let it in with nitrogen, place it at 25°C-30°C for 48h, then raise the temperature to 100°C and place it in a vacuum environment for 12h t...

Embodiment 2

[0040] 1) First add 4.674gNaAlO 2 Add it to 16 mL of 1.25 mol / L NaOH solution and stir the magnetic stirrer at 400 rpm for 1 hour to prepare the first solution;

[0041] 2) Dissolve 19.69 g of silica sol (HS-4015) in 7.24 mL of distilled water, and use a magnetic stirrer to stir at 400 rpm for 1 hour to prepare a second solution;

[0042] 3) After the first and second solutions are stirred for 1 hour, the first solution is slowly added dropwise to the first solution at a rate of 10 mL / h. During this process, the first solution is continuously stirred at 400 rpm using a magnetic stirrer. After the addition, continue to stir at the same stirring rate for 5 hours to obtain the third solution;

[0043] 4) Put the third solution in a 100 mL flask, bubbling with nitrogen, and place it at 30° C. for 48 hours, then increase the temperature to 100° C. and place it in a vacuum environment for 12 hours to obtain a dry zeolite solid. The obtained zeolite solid was washed with distilled water to...

Embodiment 3

[0056] 1) First, 9.348gNaAlO 2 Add it to 36mL of 1.25mol / L NaOH solution, use a magnetic stirrer to stir at 800rpm for 1h to prepare the first solution;

[0057] 2) Dissolve 39.38 g of silica sol (HS-4015) in 14.48 mL of distilled water, and use a magnetic stirrer to stir at 800 rpm for 1 hour to prepare a second solution;

[0058] 3) After the first and second solutions are stirred for 1 hour, the first solution is slowly added dropwise to the first solution at a rate of 10 mL / h. During this process, the first solution is continuously stirred at 800 rpm using a magnetic stirrer. After the addition, continue to stir at the same stirring rate for 5 hours to obtain the third solution;

[0059] 4) Put the third solution in a 100 mL flask, bubbling with nitrogen, and place it at 30° C. for 48 hours, then increase the temperature to 100° C. and place it in a vacuum environment for 12 hours to obtain a dry zeolite solid. The obtained zeolite solid was washed with distilled water to pH=7, ...

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Abstract

The invention discloses a manufacturing method of a manganese-ion doped cesium lead chloride high-stability perovskite quantum dot white light-emitting diode inlaid in a zeolite. The method comprisestwo steps of firstly, carrying out ion exchange on Cs<+> ions and entering into the zeolite based on the synthetic zeolite; then, reacting with PbCl2 dissolved in an organic solvent; using the two independent steps to prevent cation repulsion so that Cs<+> and Pb<2 +> are combined together; and finally, obtaining a pure Mn: CsPbCl3 perovskite quantum dot composite material embedded in the zeolite,and coating on a bluish violet light-emitting small lamp bead through combining with a green fluorescent powder to obtain a white perovskite quantum dot photoluminescence device. Stability of perovskite quantum dots is greatly improved, losses of a device are reduced, usage of toxic element lead is reduced by replacing Pb<2+> by Mn<2+>, and photoluminescence efficiency is improved so that the perovskite quantum dots are well developed towards a green and environment-friendly direction.

Description

Technical field [0001] The invention relates to the technical field of perovskite quantum dot photoelectric materials, in particular to a method for preparing a high-stability perovskite quantum dot white light-emitting diode based on manganese ions embedded in zeolite doped with lead chloride and cesium chloride. Background technique [0002] In recent years, all inorganic perovskite (CsPbX 3 , X = Cl, Br, I) Quantum dots (QDs) have attracted widespread attention due to their excellent optoelectronic properties, and this field is developing rapidly. All-inorganic perovskite quantum dots have a high photoluminescence quantum yield and a narrow-wavelength emission that can be adjusted in the entire visible spectrum. Therefore, they are used in quantum dot white light-emitting diodes (WQLED), lasers and other fields. Wide range of applications. Although the current domestic and foreign influence on CsPbX 3 Quantum dots have made great progress in the study of color conversion phos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/50C09K11/66
CPCC09K11/665H01L33/502H01L2933/0041
Inventor 李凤刘自磊魏加湖黄高翔黄彦曹镭清黄圆圆
Owner NANCHANG HANGKONG UNIVERSITY
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