Stirrer, apparatus of manufacturing quantum dot including the same, and method of manufacturing quantum dot using the quantum dot manufacturing apparatus

Patent metadata

Field	Value
Publication number	US-12226748-B2
Application number	US-202117236985-A
Country	US
Kind code	B2
Filing date	Apr 21, 2021
Priority date	Sep 7, 2020
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A stirrer includes a magnetic bar and a microwave absorbing layer around the magnetic bar. The stirrer absorbs a microwave and converts the microwave to thermal energy to heat the mixed solution reactant.

First claim

What is claimed is:

1. A quantum dot manufacturing apparatus comprising:
a reaction furnace to accommodate a mixed solution comprising a cationic precursor, an anionic precursor, and an organic solvent;
a stirrer in the reaction furnace; and
a microwave generator to provide a microwave to be transmitted through the reaction furnace,
wherein the stirrer comprises:
a magnetic bar; and
a microwave absorbing layer around the magnetic bar.

2. The quantum dot manufacturing apparatus of claim 1 , wherein the microwave absorbing layer comprises at least one of a metal oxide of perovskite structure, a metal oxide of spinel ferrite structure, or a metal oxide of hexagonal ferrite structure.

3. The quantum dot manufacturing apparatus of claim 1 , wherein the microwave absorbing layer comprises at least one of LaMnO 3 , BaCO 3 , Fe 2 CO 3 , MnCO 3 , NiFe 2 SO 4 , BaFe 2 O 4 , or BaFe 12 O 19 .

4. The quantum dot manufacturing apparatus of claim 1 , wherein a loss tangent of the mixed solution is smaller than a loss tangent of the microwave absorbing layer.

5. The quantum dot manufacturing apparatus of claim 1 , wherein the organic solvent comprises at least one of an octadecene or a trioctylphosphine.

6. The quantum dot manufacturing apparatus of claim 1 , wherein the microwave has an energy equal to or greater than about 260 W.

7. A quantum dot manufacturing method, the method comprising:
providing a cationic precursor, an anionic precursor, and an organic solvent;
stirring the cationic precursor, the anionic precursor, and the organic solvent utilizing a stirrer to manufacture a mixed solution; and
supplying a microwave to heat the mixed solution, the heating of the mixed solution comprising:
supplying the microwave to the stirrer to heat the stirrer; and
heating the mixed solution utilizing the heated stirrer.

8. The quantum dot manufacturing method of claim 7 , wherein the stirrer comprises:
a magnetic bar; and
a microwave absorbing layer on the magnetic bar, and
wherein the heating of the stirrer comprises allowing the microwave absorbing layer to absorb the microwave.

9. The quantum dot manufacturing method of claim 7 , wherein the microwave has an energy equal to or greater than about 260 W.

10. The quantum dot manufacturing method of claim 7 , wherein the heating of the mixed solution comprises heating the mixed solution to a temperature equal to or greater than about 250° C. and equal to or smaller than about 300° C.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Donghee
• Park Chul Soon
• Song Junghoon

Classifications

• B01F2101/2204

  Mixing chemical components in generals in order to improve chemical treatment or reactions, independently from the specific application · CPC title

• B01F2035/99

  Heating · CPC title

• B01F35/95

  using heated or cooled stirrers · CPC title

• B01F33/452 Primary

  using independent floating stirring elements · CPC title

• B01J2219/1215

  Single reactor · CPC title