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Perovskite composite material and preparation method thereof

A composite material and perovskite technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve problems that cannot meet practical applications, and achieve improved air humidity resistance and stability properties, the preparation method is simple, and the effect of stable luminescence

Active Publication Date: 2019-06-04
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above disclosed technology, the perovskite composite material is prepared by using additives, silica sol or silicon dioxide. Although the stability of the perovskite material is improved to a certain extent, when the composite material encounters water, it immediately decomposes. Can not meet the needs of practical applications

Method used

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  • Perovskite composite material and preparation method thereof
  • Perovskite composite material and preparation method thereof
  • Perovskite composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] (1) Dissolve 0.4mmol of cesium bromide and 0.4mmol of lead bromide in 10mL of N’N-dimethylformamide and stir until completely dissolved to form CsPbBr 3 precursor solution.

[0043] (2) Take 1 mL of the above perovskite precursor solution, add 50 μL oleylamine and 75 μL oleic acid in sequence to form CsPbBr 3 mixture.

[0044] (3) Weigh 0.528mL of tetramethyltetravinylcyclotetrasiloxane and 1.472mL of tetramethylcyclotetrasiloxane, and mix them well under stirring to obtain a siloxane solution.

[0045] (4) 100 μL of CsPbBr prepared in step (2) 3 Add the mixed solution into the siloxane solution prepared in step (3), and stir evenly to form a green mixed solution.

[0046] (5) Place the obtained green mixed solution in a vacuum oven at 40°C for 24 hours to obtain CsPbBr 3 Perovskite composite films.

[0047] Stability and hydrophobicity of the composite film of test above-mentioned preparation, result shows that composite material of the present invention has good ...

Embodiment 2

[0052] (1) Dissolve 0.4mmol of cesium iodide and 0.4mmol of lead iodide in 10mL of N’N-dimethylformamide and stir until completely dissolved to form CsPbI 3 precursor solution. Simultaneously prepare CsPbBr according to the method of embodiment 1 step (1) 3 precursor solution.

[0053] (2) Different volumes of CsPbBr 3 and CsPbI 3 Mixed into 1 mL perovskite precursor solution, to which 50 μL oleylamine and 75 μL oleic acid were sequentially added to form different CsPbBr x I 3-x Mixed solutions where x = 2.5, 2 or 1.5.

[0054] (3) Weigh 0.528mL of tetramethyltetravinylcyclotetrasiloxane and 1.472mL of tetramethylcyclotetrasiloxane, and mix them well under stirring to obtain a siloxane solution.

[0055] (4) Dissolve 100 μL of CsPbBr x I 3-x Add the perovskite mixed solution into the siloxane solution and stir evenly to form solutions of different colors.

[0056] (5) The obtained solution was placed in a vacuum oven at 40° C. for 24 hours to obtain perovskite composi...

Embodiment 3

[0059] (1) Dissolve 0.4mmol of cesium chloride and 0.4mmol of lead chloride in 10mL of N’N-dimethylformamide, stir until completely dissolved to form CsPbCl 3 precursor solution. Simultaneously prepare CsPbBr according to the method of embodiment 1 step (1) 3 precursor solution.

[0060] (2) Different volumes of CsPbBr 3 and CsPbCl 3 Mixed into 1 mL perovskite precursor solution, to which 50 μL oleylamine and 75 μL oleic acid were sequentially added to form different CsPbBr x Cl 3-x Mixed solutions where x=1.5, 1 or 2.

[0061] (3) Weigh 0.528mL of tetramethyltetravinylcyclotetrasiloxane and 1.472mL of tetramethylcyclotetrasiloxane, and mix them well under stirring to obtain a siloxane solution.

[0062] (4) Dissolve 100 μL of CsPbBr x Cl 3-x Add the perovskite mixed solution into the siloxane solution and stir evenly to form solutions of different colors.

[0063] (5) The obtained solution was placed in a vacuum oven at 40° C. for 24 hours to obtain perovskite compos...

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Abstract

The invention relates to a preparation method of a perovskite composite material, and the method comprises: preparing at least one perovskite precursor solution, uniformly mixing Si-Vi bond-containingsiloxane and Si-H bond-containing siloxane, adding the at least one perovskite precursor solution into the mixture, uniformly mixing, carrying out reaction on the mixed solution at 10-80 DEG C, and completely reacting to obtain the perovskite composite material; the molecular formula of a perovskite precursor is ABx3, the perovskite precursor solution contains a surface ligand, and the molar ratio of Si-Vi bond to Si-H bond is 1:1-10. The composite material is stable in luminescence, high in luminescence efficiency and good in water resistance, and has a good application prospect in the fields of illumination and display and anti-counterfeiting.

Description

technical field [0001] The invention relates to the technical field of preparation of luminescent materials, in particular to a perovskite composite material and a preparation method thereof. Background technique [0002] Metal halide perovskite materials have been widely studied in the fields of solar cells, lighting, and displays due to their high carrier mobility, broadband tunability, and high fluorescence quantum yield. However, perovskite materials are unstable in humidity environment, easy to aggregate and even decompose, which limits their practical applications. At present, there are many methods to improve the stability of perovskite materials, such as using inorganic nanomaterial silicon dioxide as a coating material to increase the stability of inorganic perovskite (Journal of the American Chemical Society, 2016,138(18):5749- 5752.). CN201610564233 discloses a hydrophobic perovskite solar cell, CN201810415858 discloses a fluorescent material based on organic-in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06B82Y20/00B82Y30/00
Inventor 张茂杰王亚楠国霞
Owner SUZHOU UNIV