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A kind of manganese-doped inorganic halogen perovskite quantum dot and its preparation method and application

A technology of perovskite and quantum dots, which is applied in the fields of applications, chemical instruments and methods, household appliances, etc., can solve the problems of no double emission, unadjustable wavelength, low quantum yield, etc., achieve short dissolution time and reduce preparation The effect of high cost and solubility

Active Publication Date: 2020-08-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention solves the technical problems that the prior art manganese-doped inorganic halogen-type perovskite quantum dots do not have simultaneous strong double emission, and the wavelength cannot be adjusted, and the quantum yield is low and the amount of manganese doped is low under the condition of non-nitrogen protection. , and provides a new application of manganese-doped inorganic halogen perovskite quantum dots

Method used

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  • A kind of manganese-doped inorganic halogen perovskite quantum dot and its preparation method and application
  • A kind of manganese-doped inorganic halogen perovskite quantum dot and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Dissolve 0.943g of CsOAc in 30mL of octadecene, and add 3mL of oleic acid, and keep stirring until completely dissolved to obtain a cesium precursor. 0.455g lead acetate, 0.0755g MnCl 2 Dissolve in 30 mL of octadecene, add 3 mL of oleic acid and 3 mL of oleylamine, heat to 80° C., and keep stirring until completely dissolved to obtain a halogen precursor.

[0029] Take 2mL of the cesium precursor solution and inject it into the halogen precursor, and keep it at 80°C with stirring for 5min. Then the solution is cooled to normal temperature with a water bath, and the luminescent quantum dots containing only halogen chlorine doped with manganese are formed. All operations do not require nitrogen protection and can be operated in the atmosphere.

[0030] Take 5 mL of the quantum dot solution obtained above, add 10 mL of ethyl acetate solution, and then put it into a centrifuge for centrifugation at 8000 rpm for 5 min. Subsequently, the upper solution was discarded, leavi...

Embodiment 2

[0032] Dissolve 0.943g of CsOAc in 30mL of octadecene, and add 3mL of oleic acid, and keep stirring until completely dissolved to obtain a cesium precursor. 0.325g lead acetate, 0.126g MnCl 2 Dissolve in 30 mL of octadecene, add 3 mL of oleic acid and 3 mL of oleylamine, heat to 90° C., and keep stirring until completely dissolved to obtain a halogen precursor.

[0033] Take 2mL of the cesium precursor solution and inject it into the halogen precursor, and keep it at 90°C with stirring for 5min. Then the solution is cooled to normal temperature with a water bath, and the luminescent quantum dots containing only halogen chlorine doped with manganese are formed. All operations do not require nitrogen protection and can be operated in the atmosphere.

[0034] Take 5 mL of the quantum dot solution obtained above, add 10 mL of ethyl acetate solution, and then put it into a centrifuge for centrifugation at 8000 rpm for 5 min. Subsequently, the upper solution was discarded, leavin...

Embodiment 3

[0036] Dissolve 0.943 g of CsOAc in 30 mL of octadecene, add 3 mL of oleic acid, and keep stirring until it is completely dissolved to obtain a cesium precursor. 0.260g lead acetate, 0.151MnCl 2 Dissolve in 30 mL of octadecene, add 3 mL of oleic acid and 3 mL of oleylamine, heat to 100° C., and keep stirring until completely dissolved to obtain a halogen precursor.

[0037] Take 2 mL of the cesium precursor solution and inject it into the halogen precursor, and keep it at 100 °C for 5 min with stirring. Then, the solution was cooled to room temperature with a water bath, and the luminescent quantum dots containing only halogen chlorine-doped manganese were formed. All operations do not require nitrogen protection and can be operated in the atmosphere.

[0038] Take 5 mL of the quantum dot solution obtained above, add 10 mL of ethyl acetate solution, and then put it into a centrifuge for centrifugation at a rotational speed of 8000 rpm and a time of 5 min. Subsequently, the ...

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Abstract

The invention discloses a manganese-doped inorganic halogen perovskite quantum dot, and a preparation method and an application thereof. The preparation method comprises the following steps: dissolving lead salt and manganese chloride, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a halogen precursor; dissolving caesium salt so as to obtain a caesium precursor; adding the caesium precursor into the halogen precursor, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a quantum dot solution; and purifying the quantum dot solution so as to obtain the manganese-doped inorganic halogen perovskite quantum dot. The invention provides a method for high-yield preparation of the manganese-doped inorganic halogen perovskite quantum dot without the need of protection of inert gas at a low temperature. The method provided by the invention reduces preparation cost, improves preparation efficiency, and can be used for large-scale production. The quantum dot is applied to invisible ink which has good effect, is convenient to write and has stable invisible effect; meanwhile, after manganese is doped, the quantum dot has greatly-improved thermal stability and greatly-reduced toxicity.

Description

technical field [0001] The invention belongs to the technical field of optoelectronic material preparation, and more specifically relates to a manganese-doped inorganic halogen perovskite quantum dot and a preparation method thereof. Background technique [0002] Perovskite-type organic-inorganic lead halides (APbX 3 :A=Cs or CH 3 NH 3 + ; X=Cl, Br, or I) due to its extremely high quantum yield, narrow and adjustable emission spectrum, low-cost preparation process, and high carrier mobility, it is widely used in light-emitting diodes, lasers, and solar cells. The field has huge potential application value. However, organic lead halide perovskite is extremely sensitive to the environment, especially water and air, which limits its application in the field of optoelectronic devices. In contrast, the inorganic halogen perovskite (CsPbX) with the same advantages 3 ) well overcomes the shortcoming of being sensitive to air and water. [0003] However, manganese-doped inorg...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66B82Y40/00C09D11/50C09D11/03
CPCB82Y40/00C09D11/03C09D11/50C09K11/665
Inventor 臧剑锋董侣明陈卓叶镭喻研
Owner HUAZHONG UNIV OF SCI & TECH
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