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Preparation method of nanocrystalline based on blue-violet light

A technology of nanocrystals and purple light, applied in the field of nanocrystals, can solve the problems of poor stability of perovskite nanocrystals, and achieve the effects of improving air stability, low energy consumption, and narrow half-peak width

Pending Publication Date: 2021-12-31
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a preparation method based on blue-violet light nanocrystals, which aims to solve the problem of poor stability of perovskite nanocrystals in the prior art

Method used

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  • Preparation method of nanocrystalline based on blue-violet light
  • Preparation method of nanocrystalline based on blue-violet light
  • Preparation method of nanocrystalline based on blue-violet light

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Embodiment 1

[0028] Such as Figure 1-7 As shown, a preparation method based on blue-violet light nanocrystals provided by an embodiment of the present invention includes the following steps:

[0029] Step 1: Put octadecene, oleic acid and cesium carbonate in a three-necked flask, heat to 130°C under an inert gas atmosphere, and stir until the solution dissolves to obtain a precursor solution, in which octadecene and oleic acid The volume ratio is 10:1, the concentration of cesium carbonate is 0.04g / mL, and the inert gas is N 2 ;

[0030] Step 2: Add octadecene, lead chloride and zinc chloride to a 500mL three-necked bottle to vacuumize, then pass in an inert gas, add a certain amount of oleic acid and oleylamine when heated to 130°C, and obtain clarification after stirring Clear solution in which the inert gas is N 2 , the volume ratio of octadecene, oleic acid and oleylamine is 20:3:3, and the molar ratio of zinc chloride and lead chloride is 0.1:1;

[0031] Step 3: Heat the solution...

Embodiment 2

[0034] Such as Figure 1-7 As shown, a preparation method based on blue-violet light nanocrystals provided by an embodiment of the present invention includes the following steps:

[0035] Step 1: Put octadecene, oleic acid and cesium carbonate in a three-necked flask, heat to 130°C under an inert gas atmosphere, and stir until the solution dissolves to obtain a precursor solution, in which octadecene and oleic acid The volume ratio is 10:1, the concentration of cesium carbonate is 0.04g / mL, and the inert gas is N 2 ;

[0036] Step 2: Add octadecene, lead chloride and zinc chloride to a 500mL three-necked bottle to vacuumize, then pass in an inert gas, add a certain amount of oleic acid and oleylamine when heated to 130°C, and obtain clarification after stirring Clear solution in which the inert gas is N 2, the volume ratio of octadecene, oleic acid and oleylamine is 20:3:3, and the molar ratio of zinc chloride and lead chloride is 0.3:1;

[0037] Step 3: Heat the solution ...

Embodiment 3

[0040] Such as Figure 1-7 As shown, a preparation method based on blue-violet light nanocrystals provided by an embodiment of the present invention includes the following steps:

[0041] Step 1: Put octadecene, oleic acid and cesium carbonate in a three-necked flask, heat to 130°C under an inert gas atmosphere, and stir until the solution dissolves to obtain a precursor solution, in which octadecene and oleic acid The volume ratio is 10:1, the concentration of cesium carbonate is 0.04g / mL, and the inert gas is N 2 ;

[0042] Step 2: Add octadecene, lead chloride and zinc chloride to a 500mL three-necked bottle to vacuumize, then pass in an inert gas, add a certain amount of oleic acid and oleylamine when heated to 130°C, and obtain clarification after stirring Clear solution in which the inert gas is N 2 , the volume ratio of octadecene, oleic acid and oleylamine is 20:3:3, and the molar ratio of zinc chloride and lead chloride is 1.03:1;

[0043] Step 3: Heat the solutio...

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Abstract

The invention is applicable to the field of chemical preparation, and provides a preparation method of nanocrystals based on blue-violet light. The method comprises the following steps: 1, placing octadecene, oleic acid and cesium carbonate in a three-necked bottle, carrying out heating to 130 DEG C in an inert gas atmosphere, and carrying out stirring until the solution is dissolved to obtain a precursor solution; 2, adding octadecene, lead chloride and zinc chloride into a three-necked bottle, carrying out vacuumizing, then introducing inert gas, carrying out heating to 130 DEG C, adding oleic acid and oleylamine, and carrying out stirring to obtain a clear and transparent solution; 3, heating the solution to 200 DEG C, taking the precursor in the step 1, and injecting the precursor into the solution in the step 2; 4, keeping the solution at the temperature of 200 DEG C for 1 minute, then cooling the solution through an ice-water bath, then centrifugally dispersing the solution into a non-polar solvent, and obtaining the alloyed nanorod. According to the invention, the nanocrystalline with blue-violet light emission and improved stability and conductivity is synthesized.

Description

technical field [0001] The invention belongs to the field of nanocrystals, in particular to a preparation method based on blue-violet light nanocrystals. Background technique [0002] All-inorganic perovskite CsPbX due to high photoluminescence quantum yield, tunable emission wavelength, and narrow emission linewidth 3 Nanocrystals can be used in solid-state lighting and high-definition displays, especially electrically driven light-emitting diodes. Despite such outstanding potential, the toxicity and stability of lead in perovskite nanocrystals is generally considered a drawback, hindering the commercial application of LEDs. In terms of the toxicity of lead, Pb in lead-based perovskites can be partially replaced by using other impurity ions 2+ , in order to reduce the toxic content, but also will improve the stability. Furthermore, in order to improve the CsPbX 3 To stabilize nanocrystals, researchers have developed various approaches, such as surface coating or encapsu...

Claims

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Application Information

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IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCC09K11/665B82Y20/00B82Y40/00
Inventor 宋宏伟陈文达白雪董彪徐琳徐文周东磊
Owner JILIN UNIV