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A copper-doped all-inorganic halogen perovskite fluorescent material and its preparation method and application

A fluorescent material, copper doping technology, applied in luminescent materials, chemical instruments and methods, nano-optics, etc., can solve the problem that the octahedral configuration of B ions cannot be satisfied.

Inactive Publication Date: 2018-10-12
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult to replace its cations. The reason is mainly two aspects. When some ions are replaced, the octahedral configuration of B ions cannot be satisfied and whether the material can still maintain its perovskite structure after replacement.

Method used

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  • A copper-doped all-inorganic halogen perovskite fluorescent material and its preparation method and application
  • A copper-doped all-inorganic halogen perovskite fluorescent material and its preparation method and application
  • A copper-doped all-inorganic halogen perovskite fluorescent material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] a, 0.19mmoL of lead bromide (PbBr 2 ) and 0.01mmoL copper bromide (CuBr 2 ) powder in a 30mL quartz reactor, add 5mL of octadecene, then add 0.3mL of oleic acid and 0.3mL of oleylamine, seal with a rubber stopper, place in a magnetic stirring electric heating mantle, vacuumize, and slowly heat up to 100°C;

[0024] b. After constant temperature for 30 minutes, fill in nitrogen gas, slowly raise the temperature of the reaction system to 170°C, fill in nitrogen gas, and keep constant temperature for 30 minutes after the temperature stabilizes.

[0025] c. Quickly inject 0.4mL of octadecene solution containing 0.8M cesium ions into the system of step b, react for 5 seconds, and quickly place the entire quartz reactor in an ice-water bath for 5 minutes;

[0026] d. Centrifuge the solution in step c at 9000 rpm for 15 minutes in a high-speed centrifuge,

[0027] e. Wash the centrifuged product in step d three times with toluene solvent, and dry it under vacuum at a temper...

Embodiment 2

[0030] a, 0.16mmoL of lead bromide (PbBr 2 ) and 0.04mmoL copper bromide (CuBr 2 ) powder in a 30mL quartz reactor, add 5mL of octadecene, then add 0.4mL of oleic acid and 0.4mL of oleylamine, seal with a rubber stopper, place in a magnetic stirring electric heating mantle, vacuumize, and slowly heat up to 105°C;

[0031] b. After constant temperature for 30 minutes, fill in nitrogen gas, slowly raise the temperature of the reaction system to 160°C, fill in nitrogen gas, and continue to keep constant temperature for 30 minutes after the temperature is stable;

[0032] c. Quickly inject 0.3mL of octadecene solution containing 0.1M cesium ions into the system of step b, react for 7 seconds, and quickly place the entire quartz reactor in an ice-water bath for 6 minutes,

[0033] d, the solution in step c is centrifuged at 8000 rpm in a high-speed centrifuge for 15 minutes;

[0034]e. Wash the centrifuged product in step d 4 times with n-hexane solvent, and dry it under vacuum ...

Embodiment 3

[0037] a, 0.12mmoL of lead bromide (PbBr 2 ) and 0.08mmoL copper bromide (CuBr 2 ) powder in a 30mL quartz reactor, add 5mL of octadecene, then add 0.5mL of oleic acid and 0.5mL of oleylamine, seal with a rubber stopper, place in a magnetic stirring electric heating mantle, vacuumize, and slowly heat up to 110°C;

[0038] b. After constant temperature for 30 minutes, fill in nitrogen gas, slowly raise the temperature of the reaction system to 170°C, fill in nitrogen gas, and continue to keep constant temperature for 30 minutes after the temperature is stable;

[0039] c. Quickly inject 0.4mL of octadecene solution containing 0.5M cesium ions into the system of step b, react for 8 seconds, and quickly place the entire quartz reactor in an ice-water bath for 10 minutes;

[0040] d. Centrifuge the solution in step c at 10,000 rpm for 15 minutes in a high-speed centrifuge;

[0041] e. Wash the centrifuged product in step d 4 times with n-hexane solvent, and dry it under vacuum ...

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Abstract

The invention relates to a copper-doped all-inorganic halogen perovskite fluorescent material and a preparation method and application thereof. The material has structural formula CsPb1-xCuxBr3, wherein X is in the range of 0-1; the material is a light yellow or yellow powder, and in cubic phase, and has a space group as below. The method is as below: dissolving in an organic solvent at high temperature for further reaction, washing with a hexane or toluene solvent by multiple times, purifying to obtain the copper-doped all-inorganic halogen perovskite fluorescent material with size of 10-30nm. By measuring of the UV visible (wavelength range of 350-700nm) and fluorescence spectra (excitation wavelength is 360nm with), with the increase of doping amount of copper, the absorption wavelength and corresponding fluorescence emission wavelength show the red shift phenomenon, at the same time, the fluorescence quantum yield also changes. The preparation method of the invention is simple, green and environment-friendly, and has good application potential in the preparation of LED.

Description

technical field [0001] The invention relates to a preparation method and application of a copper-doped all-inorganic halogen perovskite fluorescent material. Background technique [0002] LED (Light Emitting Diode) is recognized as a new light source in the 21st century, and it is the fourth-generation light source after incandescent lamps, fluorescent lamps, and high-intensity gas discharge lamps. LED is a light source made of semiconductor technology, and the wavelength of the light it emits covers infrared light, visible light and ultraviolet light. Because LED is a new lighting equipment that is different from traditional light sources, light-emitting diodes (LEDs) that can directly convert electrical energy into light energy, with the maturity and breakthrough of manufacturing technology, have become light-emitting components that integrate the advantages of many manufacturers. It makes LED seem to be the rising star of lighting source in the 21st century. LED is comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/66H01L33/50B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665H01L33/502
Inventor 范晓芸王富王传义
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI