Quantum dots, display apparatus including the same, and method for manufacturing the display apparatus

Patent metadata

Field	Value
Publication number	US-2024114709-A1
Application number	US-202017767723-A
Country	US
Kind code	A1
Filing date	Sep 22, 2020
Priority date	Oct 8, 2019
Publication date	Apr 4, 2024
Grant date	—

Abstract

The quantum dot comprises a ligand which is a copolymer comprising a first repeating unit comprising at least one or more hole transporting functional groups and a second repeating unit comprising at least one or more photocrosslinking functional groups.

First claim

What is claimed is:

1 . A quantum dot, comprising:
a ligand which is a copolymer comprising a first repeating unit comprising at least one or more hole transporting functional groups; and a second repeating unit comprising at least one or more photocrosslinkable functional groups.

2 . The quantum dot of claim 1 , wherein the at least one or more hole transporting functional groups of the first repeating unit comprise at least one or more among an indolyl group, a carbazolyl group, a benzofuranyl group, a dibenzofuranyl group, a benzothiophenyl group, a dibenzothiophenyl group, or an amino group.

3 . The quantum dot of claim 1 , wherein the first repeating unit has a structure in which a first monomer is polymerized, and the first monomer comprises at least one of N-vinylcarbazole, triphenylamine, 4-butylphenyldiphenylamine, tris(4-carbazol-9-ylphenyl)amine, or N′-dicarbazolyl-3,5-benzene.

4 . The quantum dot according to claim 1 , wherein the at least one or more photocrosslinkable functional groups of the second repeating unit comprises at least one of an azide group, a diazirine group, a benzoylphenoxy group, an alkenyloxycarbonyl group, a (meth)acryloyl group, or an alkenyloxyalkyl group.

5 . The quantum dot of claim 1 , wherein the copolymer has a number average molecular weight of 100 to 50,000.

6 . The quantum dot of claim 1 , wherein the copolymer has a weight average molecular weight of 100 to 50,000.

7 . The quantum dot of claim 1 , wherein the copolymer has a molecular weight distribution of 1 to 2.

8 . The quantum dot of claim 1 , wherein the copolymer comprises the second repeating unit in an amount of 0.1 mol % to 10 mol %.

9 . The quantum dot of claim 1 , wherein the copolymer comprises a random copolymer.

10 . The quantum dot of claim 1 , wherein the copolymer is represented by the following Chemical Formula 1:

wherein, in the Chemical Formula 1, m and n are each an integer of 1 to 200.

11 . A display apparatus, comprising:
a first electrode; a second electrode; and a light emitting layer disposed between the first electrode and the second electrode and including the quantum dot of claim 1 .

12 . The display apparatus of claim 11 , further comprising:
a hole transport layer between the first electrode and the light emitting layer; and an electron transport layer between the second electrode and the light emitting layer.

13 . The display apparatus of claim 12 , further comprising an interface in which the ligand of the quantum dot and the electron transport layer are in contact.

14 . The display apparatus of claim 12 , further comprising an interface in which the ligand of the quantum dot and the hole transport layer are in contact.

15 . A method of manufacturing a display apparatus, comprising:
applying a solution including the quantum dots of claim 1 on a substrate; exposing the solution applied on the substrate; and apparatus etching the exposed solution to form a light emitting layer including the quantum dots.

16 . The method of manufacturing a display apparatus of claim 15 , further comprising forming an electron transport layer on the light emitting layer.

Assignees

• Lg Display Co Ltd
• Univ Korea Res & Bus Found

Inventors

• Bang Joona
• Chang Ki Seok
• Moon Jeong Min
• Jung Soon Shin
• Choi Dong Hoon
• Kim Hyung Jong
• Ko Jae Wan

Classifications

• H10K71/00

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10H20/812

  within the light-emitting regions, e.g. having quantum confinement structures · CPC title

• H10K50/115 Primary

  comprising active inorganic nanostructures, e.g. luminescent quantum dots · CPC title

• H10K50/15

  Hole transporting layers · CPC title

• H10K50/16

  Electron transporting layers · CPC title