Aparatus and method for accelerated multi-stage synthesis of quantum dots

Patent metadata

Field	Value
Publication number	US-12594535-B2
Application number	US-202217853857-A
Country	US
Kind code	B2
Filing date	Jun 29, 2022
Priority date	Jun 29, 2022
Publication date	Apr 7, 2026
Grant date	Apr 7, 2026

Abstract

An apparatus for accelerated multi-stage synthesis of quantum dots (QDs) includes an injector which injects a material for producing QDs, a first reactor connected to the injector and including at least one selected from a coil reactor and a plate reactor, a second reactor connected to the first reactor and including at least one selected from the coil reactor and the plate reactor, and a first junction connected between the first reactor and the second reactor and provided with an inlet for injecting the material for producing the QDs.

First claim

What is claimed is:

1 . An apparatus for accelerated multi-stage synthesis of quantum dots, the apparatus comprising:
an injector which injects a material for producing the quantum dots; a first reactor connected to the injector and including at least one selected from a coil reactor and a plate reactor; a second reactor connected to the first reactor and including at least one selected from the coil reactor and the plate reactor; and a first junction connected between the first reactor and the second reactor and provided with an inlet for injecting the material for producing the quantum dots, a third coil reactor connected to the second reactor; a second junction connected between the second reactor and the third coil reactor; a fourth coil reactor connected to the third coil reactor; and a third junction connected between the third coil reactor and the fourth coil reactor, wherein each of the first reactor and the second reactor comprises a coil reactor, the first junction is a cross-junction provided with two inlets for injecting the material for producing the quantum dots, wherein each of the second junction and the third junction is a three-branch junction provided with a single inlet for injecting the material for producing the quantum dots, and wherein the first to fourth coil reactors have respective independent temperatures and include tubes of which length are not equal.

2 . The apparatus of claim 1 , further comprising:
a detector disposed next to the second reactor, wherein the detector measures ultraviolet to visible light to near infrared absorption of the quantum dots.

3 . An apparatus for accelerated multi-stage synthesis of quantum dots, the apparatus comprising:
an injector which injects a material for producing the quantum dots; a first reactor connected to the injector and including at least one selected from a coil reactor and a plate reactor; a second reactor connected to the first reactor and including at least one selected from the coil reactor and the plate reactor; a first junction connected between the first reactor and the second reactor and provided with an inlet for injecting the material for producing the quantum dots, wherein the first reactor comprises a first coil reactor and the second reactor comprises a first plate reactor.

4 . The apparatus of claim 3 , wherein the first junction is a cross-junction provided with two inlets for injecting a material for producing the quantum dots or a three-branch junction provided with a single inlet for injecting the material for producing the quantum dots.

5 . The apparatus of claim 4 , wherein the second reactor further comprises a second coil reactor connected to the first plate reactor, a third coil reactor connected to the second coil reactor, and a fourth coil reactor connected to the third coil reactor.

6 . The apparatus of claim 5 , wherein
the first plate reactor generates a temperature gradient therein, and the first to fourth coil reactors have respective independent temperatures.

7 . The apparatus of claim 4 , wherein the second reactor further comprises a second plate reactor connected to the first coil reactor and a second coil reactor connected to the second plate reactor.

8 . The apparatus of claim 7 , wherein
the first plate reactor includes a tube spirally rolled in from an edge to a center of the first plate reactor and spirally rolled out from the center to the edge of the first plate reactor and the second plate reactor includes a tube repeatedly bent to reciprocate in a transverse direction, wherein the second plate reactor gradually increases a temperature of the tube from an end connected to the first plate reactor to an end connected to the second coil reactor.

9 . The apparatus of claim 8 , wherein the second coil reactor includes a tube having a larger inner diameter than a tube of the second plate reactor.

10 . The apparatus of claim 9 , further comprising:
a third coil reactor connected to the second coil reactor; and a second cross-junction connected between the second coil reactor and the third coil reactor.

11 . A method of accelerated multi-stage synthesis of quantum dots, the method comprising:
injecting a precursor to a first flow reactor which synthesizes quantum dots; adding the precursor to synthesized quantum dots from the first flow reactor; and transferring a mixture of the synthesized quantum dot from the first flow reactor and the precursor to a second flow reactor which synthesizes quantum dots, wherein each of the first flow reactor and the second flow reactor includes a heating stick which generates heat by electrical heating.

12 . The method of claim 11 , further comprising:
adding the precursor to synthesized quantum dots from the second flow reactor; and transferring a mixture of the synthesized quantum dots from the second flow reactor and the precursor to a third flow reactor which synthesizes quantum dots.

13 . The method of claim 11 , wherein the first flow reactor preheats the precursor injected therein.

14 . The method of claim 11 , wherein the first flow reactor comprises a coil reactor, and the second flow reactor comprises a plate reactor which generates a temperature gradient therein.

Assignees

• Samsung Electronics Co Ltd
• North Carolina State Univ

Inventors

• Kim Taekhoon
• Abolhasani Milad
• Yang Hyeyeon
• Jun Shin Ae
• Epps Robert W

Classifications

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• B01J2219/00085

  Plates; Jackets; Cylinders · CPC title

• B01J2219/00083

  Coils · CPC title

• B01J2219/2467

  Additional heat exchange means, e.g. electric resistance heaters, coils · CPC title

• B82Y30/00

  Nanotechnology for materials or surface science, e.g. nanocomposites · CPC title