Apparatus for manufacturing quantum dot and quantum dot manufacturing method using the same

Patent metadata

Field	Value
Publication number	US-12145122-B2
Application number	US-202017068708-A
Country	US
Kind code	B2
Filing date	Oct 12, 2020
Priority date	Jan 29, 2020
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

An apparatus for manufacturing a quantum dot is provided, the apparatus including a first supplying part that provides a cationic precursor, a second supplying part that provides an anionic precursor, a mixing part connected to the first supplying part and the second supplying part, and a reaction part including a reaction tube configured to receive a liquid mixture of the cationic precursor and the anionic precursor from the mixing part and a first microwave generator configured to provide a microwave that is transmitted through the reaction tube. Therefore, the apparatus may produce a quantum dot of multi-element compounds.

First claim

What is claimed is:

1. An apparatus for manufacturing a quantum dot, the apparatus comprising:
a first supplying part configured to provide a cationic precursor;
a second supplying part configured to provide an anionic precursor;
a mixing part connected to the first supplying part and the second supplying part; and
a reaction part comprising a reaction tube configured to receive a liquid mixture of the cationic precursor and the anionic precursor from the mixing part and a first microwave generator configured to provide a microwave that is transmitted through the reaction tube, the first microwave generator being on a first plane parallel to a second plane on which the reaction tube is on, and the first and second planes being perpendicular to a thickness direction of the first microwave generator, the thickness direction being parallel to the transmission direction of the microwave, and
wherein an extension direction of the reaction tube is on the second plane.

2. The apparatus of claim 1 , wherein the reaction tube comprises a microfluidic channel provided in a zigzag form on the second plane on which the reaction tube is on.

3. The apparatus of claim 1 , wherein the reaction tube is formed of glass, quartz, or Teflon.

4. The apparatus of claim 1 , wherein the cationic precursor contains at least one of In, Ga, or Al.

5. The apparatus of claim 1 , wherein the anionic precursor contains at least one of P, As, N, or Sb.

6. The apparatus of claim 1 , wherein the first microwave generator is disposed on at least one side of the reaction tube.

7. The apparatus of claim 6 , wherein the reaction part further comprises a second microwave generator spaced apart from the first microwave generator with the reaction tube being interposed therebetween.

8. The apparatus of claim 1 , wherein the reaction tube comprises:
an inlet at a first end of the reaction tube;
an outlet at a second end of the reaction tube, the first end being closer to the mixing part than the second end being to the mixing part; and
a transferring part between the inlet and the outlet, the transferring part comprising a plurality of sub reaction parts arranged repeatedly in a U shape.

9. The apparatus of claim 8 , wherein the reaction tube further comprises a first sub inlet and a second sub inlet branched from the inlet, and a first sub outlet and a second sub outlet merged into the outlet,
the transferring part comprises a first transferring part and a second transferring part on a same plane, and
the first transferring part is between the first sub inlet and the first sub outlet, and the second transferring part is between the second sub inlet and the second sub outlet.

10. The apparatus of claim 1 , wherein the reaction tube comprises a first sub reaction tube defined by a first sub plane and a second sub reaction tube respectively defined by a second sub plane, the first and the second sub planes being spaced apart from each other and parallel to each other.

11. The apparatus of claim 1 , wherein the mixing part is heated to a temperature of about 100° C. to about 150° C.

12. The apparatus of claim 1 , wherein the microwave has an energy of about 260 W or more.

13. The apparatus of claim 1 , wherein an inner diameter of the reaction tube is about 0.1 mm to about 5.0 mm.

14. The apparatus of claim 1 , further comprising a cooling part connected to an end of the reaction part.

15. A quantum dot manufacturing method, the method comprising:
providing a cationic precursor from a first supplying part and an anionic precursor from a second supplying part, the first supplying part being separate from the second supplying part;
mixing the cationic precursor and the anionic precursor in a mixing part; and
supplying a liquid mixture of the cationic precursor and the anionic precursor to a reaction tube through which a microwave is transmitted and synthesizing a multi-element compound comprising at least one cationic element contained in the cationic precursor and at least one anion element contained in the anionic precursor by providing the microwave to the liquid mixture,
wherein the microwave is transmitted from a microwave generator on a first plane parallel to a second plane on which the reaction tube is on, and the first and second planes are perpendicular to a thickness direction of the microwave generator, the thickness direction being parallel to the transmission direction of the microwave, and
wherein an extension direction of the reaction tube is on the second plane.

16. The method of claim 15 , wherein the cationic precursor contains at least one of In, Ga, or Al, and
wherein the anionic precursor contains at least one of P, As, N, or Sb.

17. The method of claim 16 , wherein the multi-element compound is a tri-element compound of GaNP, GaNAs, GaNSb, GaPAs, GaPSb, AlNP, AlNAs, AlNSb, AlPAs, AlPSb, InGaP, InAlP, InNP, InNAs, InNSb, InPAs, or InPSb.

18. The method of claim 16 , wherein the multi-element compound is a tetra-element compound of GaAlNP, GaAlNAs, GaAlNSb, GaAlPAs, GaAlPSb, GaInNP, GaInNAs, GaInNSb, GaInPAs, GaInPSb, InAlNP, InAlNAs, InAlNSb, InAlPAs, or InAlPSb.

19. The method of claim 15 , wherein the mixing is performed at about 100° C. to about 150° C., and
wherein the synthesizing of the multi-element compound is performed at about 250° C. to about 350° C.

20. The method of claim 19 , further comprising cooling the synthesized multi-element compound.

Assignees

• Samsung Display Co Ltd

Inventors

• Lee Taekjoon
• Lee Baek Hee
• Lee Junwoo

Classifications

• B01J14/00

  Chemical processes in general for reacting liquids with liquids; Apparatus specially adapted therefor (B01J8/00, B01J19/08 take precedence) · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• B01J2219/00862

  Dimensions of the reaction cavity itself · CPC title

• B01J2219/00869

  Microreactors placed in parallel, on the same or on different supports · CPC title

• B01J2219/00833

  Plastic · CPC title