Manganese-doped cesium-lead-chlorine illuminant based on silicon dioxide coating and preparation method and application thereof

A silicon dioxide and manganese doping technology, applied in chemical instruments and methods, applications, luminescent materials, etc., can solve problems such as poor stability, achieve low cost, low experimental environment requirements, improve stability and photoluminescence quantum Yield effect

Pending Publication Date: 2021-06-25
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although great progress has been made in the synthesis technology of perovskite quantum dots at home and abroad, due to its sensitivity to water and oxygen, poor stability has become a major defect restricting the application of perovskite quantum dots.

Method used

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  • Manganese-doped cesium-lead-chlorine illuminant based on silicon dioxide coating and preparation method and application thereof
  • Manganese-doped cesium-lead-chlorine illuminant based on silicon dioxide coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Weigh 0.19g of cesium carbonate and add it to a 50ml three-neck flask, then add 10ml of 1-octadecene and 1.25ml of oleic acid solution, and heat to 150°C under a nitrogen atmosphere at a heating rate of 5°C / min until The cesium carbonate solid is completely dissolved to obtain solution a;

[0025] (2) Accurately weigh 0.052g of lead chloride and 0.024g of manganese chloride and add them to a 25ml three-necked flask, then add 10ml of 1-octadecene solution, 1.5ml of oleic acid, 1.5ml of oleylamine and 1ml of tri-n-octyl phosphine. Heating to 190°C under a nitrogen atmosphere at a heating rate of 5°C / min until the reactants are dissolved to obtain solution b;

[0026] (3) Use a disposable needle to measure 0.7ml of the solution a obtained in step (1) and quickly inject it into the solution b obtained in step (2), react for 30 seconds and then take a water bath to room temperature; the reaction product is washed, centrifuged, and vacuum-dried to obtain mn 2+ Doped pe...

Embodiment 2

[0029] (1) Weigh 0.19g of cesium carbonate and add it to a 50ml three-neck flask, then add 10ml of 1-octadecene and 1.25ml of oleic acid solution, and heat to 150°C under a nitrogen atmosphere at a heating rate of 5°C / min until The cesium carbonate solid is completely dissolved to obtain solution a;

[0030] (2) Accurately weigh 0.052g of lead chloride and 0.024g of manganese chloride and add them to a 25ml three-necked flask, then add 10ml of 1-octadecene solution, 1.5ml of oleic acid, 1.5ml of oleylamine and 1ml of tri-n-octyl Phosphine is heated to 190°C under a nitrogen atmosphere at a heating rate of 5°C / min until the reactants are dissolved to obtain solution b;

[0031] (3) Use a disposable needle to measure 0.7ml of the solution a obtained in step (1) and quickly inject it into the solution b obtained in step (2), react for 30 seconds and then take a water bath to room temperature; the reaction product is washed, centrifuged, and vacuum-dried to obtain mn 2+ Doped pe...

Embodiment 3

[0034] (1) Weigh 0.19g of cesium carbonate and add it to a 50ml three-neck flask, then add 10ml of 1-octadecene and 1.25ml of oleic acid solution, and heat to 150°C under a nitrogen atmosphere at a heating rate of 5°C / min until The cesium carbonate solid is completely dissolved to obtain solution a;

[0035] (2) Accurately weigh 0.052g of lead chloride and 0.024g of manganese chloride and add them to a 25ml three-necked flask, then add 10ml of 1-octadecene solution, 1.5ml of oleic acid, 1.5ml of oleylamine and 1ml of tri-n-octyl Phosphine is heated to 190°C under a nitrogen atmosphere at a heating rate of 5°C / min until the reactants are dissolved to obtain solution b;

[0036] (3) Use a disposable needle to measure 0.7ml of the solution a obtained in step (1) and quickly inject it into the solution b obtained in step (2), react for 30 seconds and then take a water bath to room temperature; the reaction product is washed, centrifuged, and vacuum-dried to obtain mn 2+ Doped pero...

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Abstract

The invention belongs to the technical field of perovskite quantum dot luminescent materials, and discloses a manganese-doped cesium-lead-chlorine luminophor based on silicon dioxide coating, and a preparation method and an application thereof The preparation method comprises the following steps: preparing a Mn<2+> doped CsPbCl3 quantum dot solution through an improved thermal injection method, taking the quantum dot as a precursor, adding triethoxysilane, tetramethoxysilane and tetraethoxysilane, and fully reacting under stirring; and carrying out washing, centrifugation and vacuum drying on the reaction product to obtain the luminous body. The synthetic process is simple, the cost is low, the requirements on experimental equipment and experimental environment are low, and the environmental pollution is low. By doping Mn, the stability and the photoluminescence quantum yield of CsPbCl3 are improved, and the content of a toxic element lead is reduced. The thermal stability and the water stability of the perovskite are improved by the coating of the silicon dioxide. The conditions are provided for application of the full-inorganic perovskite quantum dots in biological and aqueous environments.

Description

technical field [0001] The invention belongs to the technical field of perovskite quantum dot luminescent materials, in particular to a manganese-doped cesium lead chloride (CsPbCl) coated with silicon dioxide. 3 ) luminous body and its preparation method and application. Background technique [0002] All-inorganic perovskite quantum dots (PQDs), because of their excellent optoelectronic properties, including tunable band gaps, high photoluminescence quantum yields (PLQYs) and narrow emission linewidths throughout the visible spectrum, make them It is particularly suitable as a candidate material for numerous applications such as light-emitting diodes (LEDs), solar cells, etc. Although great progress has been made in the synthesis technology of perovskite quantum dots at home and abroad, poor stability has become a major defect restricting the application of perovskite quantum dots due to their sensitivity to water and oxygen. In particular, chlorine-based iodine-based per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66B82Y20/00B82Y30/00B82Y40/00H01L33/26C09D11/50
CPCC09K11/025C09K11/665B82Y20/00B82Y30/00B82Y40/00H01L33/26C09D11/50Y02B20/00
Inventor 张扬肖也倪亮梁振耀
Owner GUANGDONG UNIV OF TECH
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