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Method for simply synthesizing CsAg2I3 pure phase inorganic non-lead perovskite

An inorganic non-pure phase technology, applied in inorganic chemistry, chemical instruments and methods, silver compounds, etc., can solve the problems of complex operation, unfavorable large-scale production, high energy consumption, etc., and achieve enhanced fluorescence efficiency, easy operation, energy low cost effect

Inactive Publication Date: 2020-02-14
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this synthetic method can synthesize CsAg 2 I 3 , but the operation is complicated, it needs to react at high temperature for a long time, consumes a lot of energy, is not conducive to large-scale production, and needs further improvement and innovation

Method used

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  • Method for simply synthesizing CsAg2I3 pure phase inorganic non-lead perovskite
  • Method for simply synthesizing CsAg2I3 pure phase inorganic non-lead perovskite
  • Method for simply synthesizing CsAg2I3 pure phase inorganic non-lead perovskite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Put 1mmol cesium iodide, 2mmol silver iodide, 50uL dodecyl mercaptan and 25 agate balls with a diameter of 6mm into a 25mL agate jar, set the AC frequency of the ball mill to 35Hz, and the speed at this time is 1050rad / min, mechanically grind 2h, the mixture gradually becomes dense from a fluffy off-white powder and adheres to the wall of the agate jar, then becomes soft again, and finally becomes a fluffy white powder again, obtaining CsAg 2 I 3 The inorganic perovskite is irradiated with an ultraviolet lamp with an excitation wavelength of 302nm at this time, and it is found that the product emits blue fluorescence. The obtained product was heat-treated in a vacuum oven at 200° C. for 40 minutes, and cooled at -20° C. for 1 hour to 2 hours, and the fluorescence intensity was obviously enhanced. Solid absorption analysis and fluorescence emission test were carried out on the product, and its band edge absorption diagram is as follows: figure 1 Shown; the fluorescence...

Embodiment 2

[0021] The amount of dodecylmercaptan in Example 1 is changed from 50uL to 30uL, 80uL, and 100uL respectively, and other conditions and steps are unchanged. The fluorescence efficiency of each product is measured to be 36.8%, 37.4%, and 36.2%, respectively, so The optimal amount of dodecyl mercaptan is 50uL.

Embodiment 3

[0023] In Example 1, 0.5mL of water was added to the solid powder mixture of cesium iodide and silver iodide before ball milling, and the ball milling time was shortened from 2h to 1.2h, and off-white fluffy CsAg was obtained. 2 I 3 Inorganic perovskite powders, indicating that for CsAg 2 I 3 For inorganic perovskites, the addition of a small amount of water helps shorten the milling reaction time.

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Abstract

The invention relates to a method for simply synthesizing CsAg2I3 pure phase inorganic non-lead perovskite, and belongs to the technical field of semiconductor nanomaterial preparation. First cesium iodide and silver iodide are mixed at a molar ratio of 1:2 and then 1-dodecanethiol is added for grinding, with the passing of ball-milling time, the mixture first gradually becomes dense from a fluffygray-white powder and adheres to the container wall, and finally is turned into a fluffy gray-white powder again, ball-milling is stopped, the product is directly put into a vacuum oven, and heat treatment is performed at 60-300 DEG C for 2 h; and then cooling treatment is performed at -15 DEG C to -40 DEG C for 1 h-2 h to obtain the CsAg2I3 perovskite with high purity and high fluorescence efficiency. The method has the advantages that the method is simple, the operation is easy, the time consumption is short, the energy consumption is small, the synthesized CsAg2I3 is a pure phase substance, and the like, and has important significance.

Description

technical field [0001] The invention belongs to the technical field of semiconductor nanomaterial preparation, and in particular relates to a simple synthesis of CsAg 2 I 3 A method for phase-pure inorganic lead-free perovskites. Background technique [0002] Superionic conductors are a type of solid electrolytes that have similar ionic conductivity to liquid electrolytes and lower ionic conduction activation energy. Although superionic conductors are solid, they have some characteristics of liquids, that is, they have solid-liquid duality. . The most popular of this type of superionic conductor is the silver ion conductor. In 1834, Faraday first discovered that silver sulfide has extremely high electrical conductivity, and then it was discovered that α-AgI exhibited ultrahigh ionic conductivity above 420K. . with the Ag + For the further understanding of conductive ions, a series of fast ion conductors have been derived by doping monovalent or trivalent cations to stab...

Claims

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Application Information

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IPC IPC(8): C01G5/00C01G5/02C09K11/58C09K11/61
CPCC01G5/006C01G5/02C01P2002/72C01P2002/84C09K11/58C09K11/616
Inventor 张颖姚佳利解仁国张资序汪大洋杨文胜
Owner JILIN UNIV
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