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Method for preparing cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline and cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline

A technology of nanocrystals and cadmium chloride, applied in chemical instruments and methods, nanotechnology, nano-optics, etc., can solve problems such as luminous efficiency lower than 100%, achieve passivation of surface defects and deep defect energy levels, and enhance luminescence The effect of quantum efficiency and strong stability

Active Publication Date: 2020-05-29
JILIN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But so far, Mn 2+ Luminescence efficiency of doped perovskite nanocrystals still far below 100%

Method used

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  • Method for preparing cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline and cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline
  • Method for preparing cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline and cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline
  • Method for preparing cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline and cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Step 1: Add 0.8mmol of cesium carbonate, 1mL of oleic acid, and 7mL of 1-octadecene into a 50mL No. 1 three-neck flask, heat to 110°C under vacuum conditions and keep for 20 minutes to remove gas until bubbles appear in the reactant disappeared, and argon gas was introduced, and under the protection of argon gas, the mixed solution was stirred and heated to 150° C., and kept at this temperature until the solution was clear and transparent to obtain a cesium oleate precursor solution.

[0043] Step 2: Add 0.2mmol manganese chloride, 0.4mmol lead chloride, 1.5mL oleic acid, 1.5mL oleylamine, 1mL tri-n-octylphosphine, and 6mL 1-octadecene to a 50ml No. 2 three-necked flask and mix , the reaction mixture was heated to 110° C. under vacuum conditions, and kept for 30 minutes until the mixture was clear and transparent, and argon gas was introduced to raise the temperature of the reaction solution to 190° C.

[0044] Step 3: Inject 0.25 mL of the cesium oleate precursor solut...

Embodiment 2

[0047] Step 1: Add 0.8mmol of cesium carbonate, 1mL of oleic acid, and 7mL of 1-octadecene into a 50mL No. 1 three-neck flask, heat to 110°C under vacuum conditions and keep for 20 minutes to remove gas until bubbles appear in the reactant disappeared, and argon gas was introduced, and under the protection of argon gas, the mixed solution was stirred and heated to 150° C., and kept at this temperature until the solution was clear and transparent to obtain a cesium oleate precursor solution.

[0048] Step 2: Add 0.2mmol manganese chloride, 0.4mmol lead chloride, 1.5mL oleic acid, 1.5mL oleylamine, 1mL tri-n-octylphosphine, and 6mL 1-octadecene to a 50ml No. 2 three-necked flask and mix , the reaction mixture was heated to 110° C. under vacuum conditions, and kept for 30 minutes until the mixture was clear and transparent, and argon gas was introduced to raise the temperature of the reaction solution to 190° C.

[0049] Step 3: Inject 0.25 mL of the cesium oleate precursor solut...

Embodiment 3

[0054] The reaction conditions and steps are the same as in Example 1, except that the manganese chloride in step 2 is 0.3 mmol, and the lead chloride is 0.3 mmol.

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Abstract

The invention belongs to the technical field of preparation of CsPbCl3 doped nanocrystalline materials. The invention particularly relates to a method for preparing cadmium chloride post-treatment manganese-doped cesium-lead-chlorine nanocrystalline. The preparation method comprises the following steps: carrying out CdCl2 post-treatment on Mn2+ doped CsPbCl3 nanocrystalline at room temperature toimprove lattice deformation of the Mn2+ doped CsPbCl3 nanocrystalline, passivate the surface defect and deep defect energy level, improve the energy transfer efficiency from matrix excitons to Mn2+, greatly improve the luminous quantum efficiency of Mn2+ and effectively improve the stability of the Mn2+ doped CsPbCl3 nanocrystalline.

Description

technical field [0001] The present invention belongs to doped CsPbCl 3 The technical field of nanocrystalline material preparation, in particular to a method for preparing cadmium chloride post-treatment Mn 2+ doped CsPbCl 3 Nanocrystalline method and post-treatment of Mn with cadmium chloride 2+ doped CsPbCl 3 Nanocrystalline. Background technique [0002] Although already on Mn 2+ Doped semiconductor nanocrystals have been studied for nearly three decades, but so far, Mn 2+ The luminous quantum efficiency reaches nearly 100%. Manganese-doped cesium-lead-chloride nanocrystals or Mn 2+ doped CsPbCl 3 Nano crystal, is a kind of titanium ore nano crystal, red light Mn 2+ Doped perovskite nanocrystals have broad application prospects in light-emitting diodes and other optoelectronic devices. mn 2+ Luminescence originates from excitons to Mn 2+ The energy transfer, by adjusting the Mn 2+ doping level, the Mn can be 2+ The emission wavelength is from 590nm (isolated...

Claims

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Application Information

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IPC IPC(8): C09K11/66B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/665B82Y20/00B82Y30/00B82Y40/00
Inventor 袁曦赵家龙季思航李海波
Owner JILIN NORMAL UNIV
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