Synthesis method of high-fluorescence-efficiency Mn doping Cs2AgInCl6

A synthesis method and efficient technology are applied in the field of preparation of Mn-doped Cs2AgInCl6 lead-free double-layer perovskite with high fluorescence efficiency, which can solve the problems of unfavorable industrial production, complicated operation, limited application prospects of red light phosphors, etc. Realize the effect of industrialized production, simple operation and simple method

Inactive Publication Date: 2019-06-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

This method is complicated to operate, requires the introduction of strong acid and needs to be carried out under heated reaction conditions, which is not conducive to large-scale industrial production, and greatly limits its application prospect as a red phosphor
Although this method improves the fluorescence quantum yield of double-layer perovskite, it cannot be applied on a large scale to solve practical production problems and provide human society with high fluorescence quantum yield, good stability, and no toxic metals. perovskite material

Method used

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  • Synthesis method of high-fluorescence-efficiency Mn doping Cs2AgInCl6
  • Synthesis method of high-fluorescence-efficiency Mn doping Cs2AgInCl6
  • Synthesis method of high-fluorescence-efficiency Mn doping Cs2AgInCl6

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Put 1mmol of indium chloride, 2mmol of cesium chloride, 1mmol of silver chloride and 25 agate balls with a diameter of 6mm into a 25ml agate jar, adjust the AC frequency of the ball mill to 40Hz, at this time the speed is 1200rad / min, and the mechanical grinding is 1.5 Hours, the mixture gradually hardened from a fluffy white powder attached to the wall of the agate jar, then became soft, and finally turned into a fluffy powder again to obtain Cs 2 AgInCl 6 Double-layer perovskite, add 0.02mmol manganese chloride to it, and continue to grind for 30 seconds, the pink color of manganese chloride disappears completely, indicating that manganese ions have entered the crystal lattice of the material, and the resulting product is washed twice with ethanol to remove untreated The reacted cesium chloride and indium chloride were dried in a vacuum oven at 60°C for two hours, and the product was subjected to solid absorption analysis and fluorescence emission test, and the absorp...

Embodiment 2

[0024] The amount of manganese chloride in Example 1 is changed from 0.02mmol to 0.1mmol, 0.2mmol, 0.3mmol respectively, and other conditions and steps are unchanged, and the fluorescence efficiency of each product is measured to be 5.4%, 7.3%, 2.8% respectively .

Embodiment 3

[0026] The dosage of manganese chloride is 0.2mmol. After the final dried product is placed in a vacuum oven at 180°C to 350°C for heat treatment for 2 hours, the manganese-doped Cs 2 AgInCl 6 The fluorescence efficiencies were 8.6%, 9%, and 8.7%, respectively. It shows that the heat treatment at 180~350℃ helps to improve the fluorescence yield of the product.

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Abstract

The invention provides a synthesis method of high-fluorescence-efficiency Mn doping Cs2AgInCl6, and belongs to the technical field of semiconductor nanometer material preparation. According to the method, firstly, cesium chloride, silver chloride and indium chloride are mixed; then, grinding is performed; the mixture gradually becomes hard from puff white powder to be attached onto a container wall and then becomes soft; continuous grinding is performed until the mixture becomes the puff white powder again; next, manganese chloride is added; continuous grinding is performed until the pink ultra-dry manganese chloride is uniformly dispersed into a reaction system; when the pink color disappears, the grinding is stopped; the obtained product is cleaned by ethanol, and then dried for 2 hoursunder the vacuum conditions of 60 to 350 DEG C; high-fluorescence-efficiency Mn<2+> Cs2AgInCl6 is obtained. The synthesis method has the advantages that the operation is simple; the method is simple;the fluorescence quantum yield is high; the industrialized production can be easily realized, and the like.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterial preparation, and in particular relates to a Mn-doped Cs with high fluorescence efficiency 2 AgInCl 6 Preparation method of lead-free double-layer perovskite. Background technique [0002] Lead Halide Perovskite A I Pb II x 3 (A=CH 3 NH 3 , Cs; X = Cl, Br, I) has been widely used in the field of optoelectronics due to its excellent inherent characteristics such as a wide fluorescence range, ultra-high fluorescence quantum yield, and high carrier mobility. Although traditional lead halide perovskites have many excellent properties, it is undeniable that lead halide perovskites have poor thermal stability and are unstable in humid environments; and because lead halide perovskites contain lead elements, Therefore, it is generally more toxic. [0003] In this case, the bilayer perovskite A 2 m I m III x 6 (A=Cs + , M I =Cu + , Ag + , Na + ; III = Bi 3+ ,Sb 3+ ,In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62B82Y30/00B82Y40/00
Inventor 解仁国张资序汪大洋杨文胜
Owner JILIN UNIV
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