Method for manufacturing quantum dot layer, method for manufacturing luminescence device including the quantum dot layer, and display device including the quantum dot layer

Patent metadata

Field	Value
Publication number	US-11276833-B2
Application number	US-202016784006-A
Country	US
Kind code	B2
Filing date	Feb 6, 2020
Priority date	Mar 25, 2019
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

A method for manufacturing a quantum dots layer including providing a substrate on which a first electrode, a second electrode, and a third electrode are disposed; providing a first mixed solution including a first quantum dots, which have been surface-treated to have a first polarity, on the first to third electrodes; providing a second polarity opposite to the first polarity to the first electrode resulting in deposition of the first quantum dots on the first electrode; and drying the first mixed solution to form a first quantum dots layer.

First claim

What is claimed is:

1. A method for manufacturing a quantum dots layer, the method comprising:
providing a substrate on which a first electrode, a second electrode, and a third electrode, which are laterally spaced apart from each other on a plane, are disposed;
providing a first mixed solution including first quantum dots, which have been surface-treated to have a first polarity, on the first to third electrodes;
providing a second polarity opposite to the first polarity to the first electrode resulting in deposition of the first quantum dots on the first electrode; and
drying the first mixed solution to form a first quantum dots layer.

2. The method of claim 1 , wherein the providing of the first mixed solution on the first to third electrodes includes mixing a first base quantum dots with a base solution which contains a polar material to prepare a first mixed solution.

3. The method of claim 1 , further comprising:
providing a second mixed solution including second quantum dots, which have been surface-treated to have the first polarity, on the first to third electrodes;
providing the second polarity to the second electrode resulting in deposition of the second quantum dots on the second electrode;
drying the second mixed solution to form a second quantum dots layer;
providing a third mixed solution including third quantum dots which have been surface-treated to have the first polarity, on the first to third electrodes;
providing the second polarity to the third electrode resulting in deposition of the third quantum dots on the third electrode; and
drying the third mixed solution to form a third quantum dots layer.

4. The method of claim 2 , wherein the first polarity is a positive polarity.

5. The method of claim 4 , wherein the polar material is an organic compound having an amino group and a silane group.

6. The method of claim 5 , wherein the polar material is at least one selected from the group consisting of 3-aminopropyltriethoxysilane (APTES), 3-aminopropyltrimethoxysilane (APTMS), N-(6-aminohexyl)-3-aminopropyltrimethoxysilane (AHAPS), N-(2-aminoethyl)-3-aminopropylmethyldimethoxysilane (AEAPS), 3-aminopropyldimethylethoxysilane (APMES), and 3-(N,N-dimethyl)-aminopropyltrimethoxysilane (DMAPS).

7. The method of claim 2 , wherein the first polarity is a negative polarity.

8. The method of claim 7 , wherein the polar material is an organic compound having a thiol group and a carboxyl group.

9. The method of claim 8 , wherein the polar material is at least one selected from the group consisting of mercaptoacetic acid derivatives, mercaptopropionic acid derivatives, mercaptobutyric acid derivatives, and mercaptovaleric acid derivatives.

10. The method of claim 1 , wherein the first quantum dots layer absorbs blue light and emits red light or green light.

11. The method of claim 1 , wherein the substrate has an optical transmittance of at 90% or more.

12. The method of claim 1 , wherein the disposing of the first quantum dots further comprises providing the first polarity to the second luminescence electrode and the third luminescence electrode.

13. The method of claim 3 , further comprising disposing a second electrode on the first to third quantum dots layers,
wherein the first quantum dots layer emits red light, the second quantum dots layer emits green light, and the third quantum dots layer emits blue light.

Assignees

• Samsung Display Co Ltd

Inventors

• Yeon Sungmo

Classifications

• H10P95/08

  Planarisation of organic insulating materials · CPC title

• C09B68/446

  Amines or polyamines, e.g. aminopropyl, 1,3,4,-triamino-pentyl or polyethylene imine · CPC title

• B82Y40/00

  Manufacture or treatment of nanostructures · CPC title

• C09B29/0807

  characterised by the amino group · CPC title

• C04B40/029

  using an aqueous solution or dispersion · CPC title