Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of halogen copper cesium crystal

A technology for crystal and crystal growth, applied in chemical instruments and methods, copper compounds, inorganic chemistry, etc., can solve the problems of harsh preparation conditions, high cost, difficult industrialization, etc., and achieve large-scale production, low cost, and operation. simple effect

Active Publication Date: 2022-01-21
XUCHANG UNIV
View PDF5 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This preparation method has harsh conditions, high energy consumption, high cost, and is difficult to industrialize

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of halogen copper cesium crystal
  • Preparation method of halogen copper cesium crystal
  • Preparation method of halogen copper cesium crystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for copper halide cesium crystals, comprising the steps of:

[0027] 1, the preparation of crystal mother liquor, this preparation process comprises the following steps:

[0028] ①Weigh 0.1901g of copper powder and 0.3192g of cesium bromide raw materials with a purity greater than 99% according to the molar ratio Cu:Cs=2:1, and measure 20ml of 47wt% hydrobromic acid;

[0029] ②Mix the weighed copper powder, cesium bromide, and hydrobromic acid evenly, put them into a stainless steel reactor for reaction, and react for 3 hours at a temperature of 120°C to form cesium bromide copper (CsCu 2 Br 3 ) mother liquor.

[0030] 2, bromine copper cesium crystal growth, the preparation step comprises the following steps:

[0031] ① In the above cesium bromide copper (CsCu 2 Br 3 ) in the mother liquor, slowly add 1ml of methanol crystal growth agent dropwise to promote crystal generation;

[0032] ② Pass the above mixture through a rotary evaporator and ...

Embodiment 2

[0034] A preparation method for copper halide cesium crystals, comprising the steps of:

[0035] 1, the preparation of crystal mother liquor, this preparation process comprises the following steps:

[0036] ①Weigh 0.1901g of copper powder and 0.3897g of cesium iodide raw materials with a purity greater than 99% according to the molar ratio Cu:Cs=2:1, and measure 20ml of 41wt% hydroiodic acid;

[0037] ②Mix the weighed copper powder, cesium iodide, and hydroiodic acid evenly, put them into a stainless steel reaction kettle for reaction, and react for 3 hours at a temperature of 100°C to form cesium iodide copper cesium (CsCu 2 I 3 ) mother liquor.

[0038] 2, iodine copper cesium crystal growth, this preparation step comprises the following steps:

[0039] ①In the above cesium iodine copper cesium (CsCu 2 I 3 ) in the mother liquor, slowly add 1ml of methanol crystal growth agent dropwise to promote crystal generation;

[0040] ② Pass the above mixed solution through a ro...

Embodiment 3

[0042] A preparation method for copper halide cesium crystals, comprising the steps of:

[0043] 1, the preparation of crystal mother liquor, this preparation process comprises the following steps:

[0044] ①Weigh 0.1901g of copper powder and 0.3192g of cesium bromide raw materials with a purity greater than 99% according to the molar ratio Cu:Cs=2:1, and measure 20ml of 23.1wt% hydrobromic acid;

[0045] ②Mix the weighed copper powder, cesium bromide, and hydrobromic acid evenly, put them into a stainless steel reactor for reaction, and react for 10 hours at a temperature of 110°C to form cesium bromide copper (CsCu 2 Br 3 ) mother liquor.

[0046] 2, bromine copper cesium crystal growth, the preparation step comprises the following steps:

[0047] ① In the above cesium bromide copper (CsCu 2 Br 3 ) in the mother liquor, slowly add 1ml ethylene glycol crystal growth agent dropwise to promote crystal generation;

[0048] ②Dry the above mixed solution at 100°C under norma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
sizeaaaaaaaaaa
widthaaaaaaaaaa
Login to View More

Abstract

The invention discloses a preparation method of a halogen copper cesium crystal. The method comprises the following steps of firstly, preparing crystal mother liquor: weighing a copper source and a cesium source according to the atomic ratio of copper to cesium of 2: 1, uniformly mixing a weighed copper source, a weighed cesium source and weighed halogen acid, adding excessive halogen acid into a closed reaction kettle, and carrying out a hydrothermal reaction to form a halogen copper cesium CsCu2X3 crystal mother liquor, and growth of the halogen copper cesium crystal: slowly adding a crystal growth agent into the halogen copper cesium mother liquor to synthesize the halogen copper cesium CsCu2X3 crystal. The pure copper-cesium halide crystal is successfully obtained through the hydrothermal reaction and the crystal regulation growth technology, the preparation problem of the copper-cesium halide crystal is solved, and a new thought is provided for preparation of the copper-cesium halide crystal.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a method for preparing copper halide cesium crystals. Background technique [0002] In recent years, lead halide-based perovskites (APbX 3 , A=CH 3 NH 3 , Cs; X is halogen) as the emerging most promising photoluminescent material has attracted extensive attention in the field of optoelectronic technology. This material has the advantages of high fluorescence quantum yield (PLQY>90%), narrow half-width (FWHM=12-21nm) and wide color gamut (~110%). However, the poor stability of this material and the toxicity of lead restrict its wide practical application. [0003] Copper, an abundant element and non-toxic, is a good substitute for lead. The study found that cesium copper halide (CsCu 2 x 3 , X=Cl, Br, I) has a stable structure, has a wider emission wavelength, can emit green light to yellow light, and has a fluorescence quantum yield of 48%. It is a good photoluminesc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/00
CPCC01G3/006C01P2002/72C01P2004/60
Inventor 刘满营范二闯郑直
Owner XUCHANG UNIV