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Manganese doping perovskite quantum dot and molecular sieve composite luminous material, and preparation method and application thereof

A technology of luminescent materials and molecular sieves, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc. The effect of environmental stability, good stability and good application prospects

Inactive Publication Date: 2017-09-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, pure quantum dot materials are more sensitive to factors such as temperature and humidity, especially the orange-red optical quantum dots containing iodide ions in halogens are less stable, which limits their further application in white LED and other fields to a certain extent.
[0003] In addition, the lead element in perovskite quantum dots has certain toxicity as a heavy metal, which is harmful to the human body and the environment, hindering its wider production and application. Therefore, by doping other ions in perovskite quantum dots to replace lead It has also become the latest research direction

Method used

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  • Manganese doping perovskite quantum dot and molecular sieve composite luminous material, and preparation method and application thereof
  • Manganese doping perovskite quantum dot and molecular sieve composite luminous material, and preparation method and application thereof
  • Manganese doping perovskite quantum dot and molecular sieve composite luminous material, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A method for preparing a manganese-doped perovskite quantum dot and molecular sieve composite luminescent material, specifically comprising the following steps:

[0051] (1) Accurately weigh 2.13g cesium bromide (CsBr), dissolve it in 10mL distilled water to obtain a 1mol / L cesium bromide solution; mix 1.0g Y-type molecular sieve (SiO 2 / Al 2 o 3 =5.1, Alfa Aesar brand) into the cesium bromide solution, stirred in a water bath at 60°C for 20h (the stirring speed was 400r / min), centrifuged (the centrifugal speed was 3500r / min) for 5min, took the lower layer sample, washed twice with distilled water, And after drying at 80°C for 12h, Cs was obtained + Exchanged Y-type molecular sieve;

[0052] (2) Octadecene (ODE) 5mL, oleic acid (OA) 1mL, oleylamine (OAm) 1mL, lead bromide (PbBr) 2 ) 0.069g (0.0002mol) mixed in a container, vacuumed at 120°C for 10min, N 2 Stir at 120°C under the atmosphere (stirring speed is 250r / min) until the solid is completely dissolved to obta...

Embodiment 2

[0058] A method for preparing a manganese-doped perovskite quantum dot and molecular sieve composite luminescent material, specifically comprising the following steps:

[0059] (1) Accurately weigh 2.13g cesium bromide (CsBr), dissolve it in 10mL distilled water to obtain a 1mol / L cesium bromide solution; mix 1.0g Y-type molecular sieve (SiO 2 / Al 2 o 3 =5.1, Alfa Aesar brand) into cesium bromide solution, stirred in 80°C water bath for 15h (stirring speed was 450r / min), centrifuged (centrifugal speed was 3500r / min) for 5min, took the lower layer sample, washed twice with distilled water, And after drying at 70°C for 15h, Cs was obtained + Exchanged Y-type molecular sieve;

[0060] (2) Octadecene (ODE) 5mL, oleic acid (OA) 1mL, oleylamine (OAm) 1mL, lead bromide (PbBr) 2 ) 0.073g (0.0002mol) mixed in a container, vacuumed at 120°C for 10min, N 2 Stir at 120°C under the atmosphere (stirring speed is 200r / min) until the solid is completely dissolved to obtain a lead bromide...

Embodiment 3

[0066] A preparation process of a manganese-doped perovskite quantum dot and molecular sieve composite luminescent material, specifically comprising the following steps:

[0067] (1) Accurately weigh 2.13g cesium bromide (CsBr), dissolve it in 10mL distilled water to obtain a 1mol / L cesium bromide solution; add 1.0g Y-type molecular sieve into the cesium bromide solution, stir in a water bath at 60°C for 20h (stirring speed 450r / min), centrifuged (centrifuged at 3500r / min) for 5min, took the lower layer sample, washed twice with distilled water, and dried at 70°C for 15h to obtain Cs + Exchanged Y-type molecular sieve;

[0068] (2) Octadecene (ODE) 5mL, oleic acid (OA) 1mL, oleylamine (OAm) 1mL, lead bromide (PbBr) 2 ) 0.073g (0.0002mol) mixed in a container, vacuumed at 120°C for 10min, N 2 Stir at 120°C under the atmosphere (stirring speed is 200r / min) until the solid is completely dissolved to obtain a lead bromide solution;

[0069] (3) Octadecene (ODE) 10mL, oleic acid...

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Abstract

The invention belongs to the technical field of luminous materials, and discloses a manganese doping perovskite quantum dot and molecular sieve composite luminous material, and a preparation method and application thereof. The method comprises the following steps of (1) stirring molecular sieves and a caesium halide solution; performing centrifugation, washing and drying to obtain Cs<+> exchanged molecular sieves; (2) making lead halide into a lead halide solution by octadecylene, oleic acid and oleyl amine; (3) making manganese halide into a manganese halide solution by octadecylene, oleic acid and oleyl amine; (4) under the insert gas and stirring conditions, in the octadecylene, performing reaction on the lead halide solution, the manganese halide solution and the Cs<+> exchanged molecular sieves; performing cooling, washing and drying to obtain the composite luminous material. The composite luminous material realizes the royal purple and red double-peak emission; the luminous peak position can be modulated according to the proportion of manganese ions and lead ions and two different halogens. The material provided by the invention has better environment stability, and can be used in the field of white light LEDs (light emitting diodes).

Description

technical field [0001] The invention belongs to the field of luminescent materials, and in particular relates to a divalent manganese ion-doped perovskite quantum dot and molecular sieve composite luminescent material and a preparation method thereof. The composite material is used in the fields of white light LEDs and the like. Background technique [0002] In recent years' research, all-inorganic perovskite-type quantum dot materials (CsPbX 3 , X=Cl, Br, I) Due to the narrow emission peak width and high quantum yield, the stability in solution is good, and the luminescence can be adjusted in the entire visible light range by the two factors of halogen composition and particle size attracted widespread attention. These many advantages make the application of perovskite quantum dots in the field of optoelectronics, especially white LEDs, a focus of research. However, pure quantum dot materials are more sensitive to factors such as temperature and humidity, especially the o...

Claims

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Application Information

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IPC IPC(8): C09K11/66H01L51/50B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/665B82Y20/00B82Y30/00B82Y40/00H10K50/11Y02B20/00
Inventor 叶柿孙佳奕张勤远
Owner SOUTH CHINA UNIV OF TECH
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