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

Preparation method of quantum dots

A technology of quantum dots and cations, applied in the field of quantum dots, can solve the problems of waste of raw materials, lattice mismatch on the surface of the shell of quantum dots, etc.

Pending Publication Date: 2020-07-07
TCL CORPORATION
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing quantum dots, which aims to solve the problem of waste of raw materials and the existence of defects on the surface of the generated quantum dot shells in the prior art in the process of preparing quantum dot shells. Lattice Mismatch Problems

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 quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A preparation method of CdSe / ZnS core-shell quantum dots comprises steps:

[0032] 1) Preparation of cationic precursor complexes: Add 8mmol of zinc acetate, 4ml of OA, and 8ml of ODE into a three-necked flask, heat and exhaust at 200°C for 30min, then reduce the temperature of the solution to 150°C, and then add to zinc oleate Add 3ml of triheptylamine to the solution, keep stirring at 150°C for 30 minutes, and then keep it at 100°C to prepare the zinc ion precursor complex solution;

[0033] 2) Preparation of CdSe / ZnS core-shell quantum dots: Disperse 10mmol of S into 5ml of TOP at 80°C to dissolve and disperse, then cool to room temperature to prepare S-TOP (anion precursor) solution; take 100mg of CdSe Quantum dot nuclei are dispersed into a three-necked flask containing 10ml of ODE for inert gas exhaust, and then 5 ml of the zinc ion precursor complex solution in 1) is added to the solution containing CdSe quantum dot nuclei, and then the temperature of the solutio...

Embodiment 2

[0035] A preparation method of CdSe / InSe core-shell quantum dots comprises steps:

[0036]1) Preparation of cationic precursor complexes: Take 8mmol of indium acetate, 4ml of OA, and 8ml of ODE and add them together into a three-necked flask, heat and exhaust at 200°C for 30min, then reduce the temperature of the solution to 150°C, and then add zinc oleate Add 3ml of trioctylamine to the solution, keep stirring at 100°C for 50 minutes, and then keep it at 100°C to prepare an indium ion precursor complex solution;

[0037] 2) Preparation of CdSe / InSe core-shell quantum dots: Disperse 10mmol of Se into 5ml of TBP at 80°C to dissolve and disperse, then cool to room temperature to prepare Se-TBP (anion precursor) solution; take 100mg of CdSe Quantum dot nuclei were dispersed into a three-necked flask containing 10ml of ODE for inert gas exhaust, and then 5 ml of the indium ion precursor complex solution in 1) was added to the solution containing CdSe quantum dot nuclei, and then t...

Embodiment 3

[0039] A preparation method of CdSe / PbTe core-shell quantum dots comprises steps:

[0040] 1) Preparation of cationic precursor complexes: Add 8mmol of lead acetate, 4ml of OA, and 8ml of ODE together into a three-necked flask, heat and exhaust at 200°C for 30min, then reduce the temperature of the solution to 150°C, and then pour into the zinc oleate solution Add 3ml of tripropylamine to the solution and keep stirring at 200°C for 20 minutes, then keep it at 100°C to prepare the lead ion precursor complex solution;

[0041] 2) Preparation of CdSe / PbTe core-shell quantum dots: Disperse 10mmol of Te into 5ml of TOP at 80°C to dissolve and disperse, then cool to room temperature to prepare Te-TOP (anion precursor) solution; take 100mg of CdSe Quantum dot nuclei are dispersed into a three-necked flask containing 10ml of ODE for inert gas exhaust, and then 5 ml of the lead ion precursor complex solution in 1) is added to the solution containing CdSe quantum dot nuclei, and then th...

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

No PUM Login to View More

Abstract

The invention discloses a preparation method of quantum dots. The preparation method comprises the following steps: mixing a cationic precursor with trialkylamine; combining the cationic precursor with trialkylamine to prepare a cationic precursor complex, mixing the cationic precursor complex, an anionic precursor and a quantum dot core in an organic solvent, and enabling the cationic precursor complex and the anionic precursor to react on the surface of the quantum dot core to generate a quantum dot shell layer, thereby obtaining the quantum dot. After the trialkylamine is combined with thecationic precursor, due to the existence of the dipole charge effect, the covalent binding energy of metal atoms and organic acid is promoted to be reduced, the pyrolysis energy of the cationic precursor is reduced, and the activation energy of the cationic precursor is improved; when the cationic precursor complex with improved activation energy reacts with an anionic precursor to generate a quantum dot shell layer, the growth temperature of the quantum dot shell layer can be effectively reduced, lattice defects and lattice mismatch of the quantum dot shell layer can be improved, and meanwhile, the material consumption of the cationic precursor can be effectively reduced.

Description

technical field [0001] The invention relates to the field of quantum dots, in particular to a method for preparing quantum dots. Background technique [0002] Nanomaterials are known as the most promising materials in the 21st century, and quantum dots, as an important branch in the field of nanomaterials, also have important application and research values. [0003] For luminescent quantum dots, due to their special optical and electrical properties, they can be used in many fields such as light-emitting diodes, solar cells, fluorescent biomarkers, and lighting. [0004] The preparation of the quantum dot material itself will involve the growth of the core-shell. Among them, the growth of the shell layer has a great influence on the photoelectric characteristics of the quantum dot. For the alloyed shell layer of the quantum dot, it will involve the rate between different precursors. The competition of this rate is mainly regulated by the concentration ratio of different pr...

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
IPC IPC(8): C09K11/88C09K11/02B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/883C09K11/02B82Y20/00B82Y30/00B82Y40/00C09K11/88C09K11/62C09K11/54
Inventor 程陆玲杨一行
Owner TCL CORPORATION