Manganese doped inorganic halogen perovskite quantum dots and preparation method thereof

A perovskite and quantum dot technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, luminescent materials, etc., can solve the preparation conditions that require high temperature, quantum dots do not have dual emission, wavelength Can not be adjusted and other problems, to achieve the effect of reducing the preparation cost, high quantum yield, and easy operation

Active Publication Date: 2018-11-02
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 problem that the prior art manganese-doped inorganic halogen-type perovskite quantum dots do not have strong double emission at the same time, and the wavelength cannot be adjusted, and the quantum yield is low under the condition of non-nitrogen protection, the amount of manganese doping is low, and the preparation Technical issues where conditions require higher temperatures

Method used

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  • Manganese doped inorganic halogen perovskite quantum dots and preparation method thereof
  • Manganese doped inorganic halogen perovskite quantum dots and preparation method thereof
  • Manganese doped inorganic halogen perovskite quantum dots and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] 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.

[0034] 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. figure 1 and figure 2 There are fluorescence spectrum and ultraviolet absorption spectrum diagrams of the manganese-doped inorganic halogen perovskite quantum dots containing only halogen chlorine prepared in Example 1. From ...

Embodiment 2

[0036] 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.

[0037] 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. figure 1 and figure 2 There are fluorescence spectrum and ultraviolet absorption spectrum diagrams of the manganese-doped inorganic halogen perovskite quantum dots containing only halogen chlorine prepared in Example 2. From f...

Embodiment 3

[0039] 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. 0.260g lead acetate, 0.151g MnCl 2 Dissolve in 30mL octadecene, add 3mL oleic acid and 3mL oleylamine, heat to 100°C, and keep stirring until completely dissolved to obtain a halogen precursor.

[0040] Take 2mL of the cesium precursor solution and inject it into the halogen precursor, and keep it at 100°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. figure 1 and figure 2 There are fluorescence spectrum and ultraviolet absorption spectrum diagrams of the manganese-doped inorganic halogen perovskite quantum dots containing only halogen chlorine prepared in Example 3. From figure 1 It c...

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Abstract

The invention discloses manganese doped inorganic halogen perovskite quantum dots and a preparation method thereof. The preparation method comprises the following steps: lead salt and manganese chloride are dissolved and heated at 80-110 DEG C, and a halogen precursor is obtained; cesium salt is dissolved, and a cesium precursor is obtained; the cesium precursor is added to the halogen precursor,the mixture is heated at 80-110 DEG C, and the manganese doped inorganic halogen perovskite quantum dots are obtained. The method for preparing the manganese doped inorganic halogen perovskite quantumdots with high yield at lower temperature needs no inert gas protection, preparation cost is reduced, preparation efficiency is improved, quantum yield is as high as 62.41% which is 12.41% higher than the current highest quantum yield of 54% with a hot injection method, and the method can be applied to mass production.

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) Because of its extremely high quantum yield, narrow and tunable 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, inorganic halogen perov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66B82Y30/00B82Y20/00
CPCB82Y20/00B82Y30/00C09K11/665
Inventor 臧剑锋董侣明陈卓叶镭喻研
Owner HUAZHONG UNIV OF SCI & TECH
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