Quantum dot display panel, manufacturing method thereof, and display device

Patent metadata

Field	Value
Publication number	US-11611015-B2
Application number	US-201916767900-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Jan 3, 2019
Publication date	Mar 21, 2023
Grant date	Mar 21, 2023

Abstract

Disclosed are a quantum dot display panel, a manufacturing method thereof and a display device. The manufacturing method includes: forming a first functional layer on a substrate; processing the first functional layer so that the first functional layer includes a processed region and the processed region includes ions having a first polarity; forming a quantum dot layer having a second polarity in the processed region. The second polarity and the first polarity are opposite electrical polarities.

First claim

What is claimed is:

1. A manufacturing method of a quantum dot display panel, comprising:
forming a first functional layer on a substrate;
processing the first functional layer by applying an electrical signal so that the first functional layer comprises a processed region and the processed region comprises ions having a first polarity; and
forming a quantum dot layer having a second polarity in the processed region, wherein the second polarity and the first polarity are opposite electrical polarities.

2. The manufacturing method according to claim 1 , wherein the processed region is corresponding to a region to be processed before the processing the first functional layer, and a concentration of the ions having the first polarity in the processed region is greater than a concentration of the ions having the first polarity in the region to be processed.

3. The manufacturing method according to claim 1 , wherein
by the processing the first functional layer, the first functional layer comprises the processed region and an unprocessed region, and the unprocessed region is outside of the processed region; and
a concentration of the ions having the first polarity in the processed region is greater than a concentration of the ions having the first polarity in the unprocessed region.

4. The manufacturing method according to claim 1 , wherein a material of the first functional layer comprises a photodegradable substance, and further comprises at least one selected from the group consisting of nanoparticles and a bulk material.

5. The manufacturing method according to claim 4 , wherein the least one selected from the group consisting of the nanoparticles and the bulk material is configured to react with a substance produced by the photodegradable substance after the processing the first functional layer, so as to form the ions having the first polarity.

6. The manufacturing method according to claim 1 , wherein the processing the first functional layer so that the first functional layer comprises the processed region, comprises:
irradiating the first functional layer with ultraviolet light so that a region which is irradiated by the ultraviolet light and which is comprised by the first functional layer forms the processed region.

7. The manufacturing method according to claim 1 , wherein the forming the quantum dot layer having the second polarity in the processed region, comprises:
forming a quantum dot film having the second polarity on the first functional layer; and
by washing the quantum dot film having the second polarity, removing quantum dots having the second polarity which are in the quantum dot film having the second polarity and which are outside of the processed region, to form the quantum dot layer having the second polarity in the processed region.

8. The manufacturing method according to claim 1 , further comprising:
forming a quantum dot layer having the first polarity on the quantum dot layer having the second polarity, wherein an orthographic projection of the quantum dot layer having the first polarity on the first functional layer is in the processed region, and the quantum dot layer having the first polarity is on a side of the quantum dot layer having the second polarity away from the first functional layer.

9. The manufacturing method according to claim 8 , wherein the forming the quantum dot layer having the first polarity on the quantum dot layer having the second polarity, comprises:
forming a quantum dot film having the first polarity on the quantum dot layer having the second polarity; and
by washing the quantum dot film having the first polarity, removing quantum dots having the first polarity which are in the quantum dot film having the first polarity and which are outside of the processed region, so as to form the quantum dot layer having the first polarity in the processed region.

10. The manufacturing method according to claim 8 , wherein
the quantum dot display panel comprises a quantum dot light-emitting structure layer on a side of the first functional layer away from the substrate, the quantum dot light-emitting structure layer comprises the quantum dot layer having the second polarity and the quantum dot layer having the first polarity, and
the manufacturing method further comprises: electrically neutralizing the quantum dot light-emitting structure layer so that the quantum dot light-emitting structure layer does not exhibit a polarity as a whole.

11. The manufacturing method according to claim 10 , further comprising:
forming a first electrode layer, a second electrode layer and a second functional layer on the substrate, wherein the first functional layer is on a side of the first electrode layer away from the substrate, the second functional layer is on a side of the quantum dot light-emitting structure layer away from the substrate, and the second electrode layer is on a side of the second functional layer away from the substrate.

12. The manufacturing method according to claim 11 , wherein
the first electrode layer is a cathode layer, the first functional layer is an electron transport layer, the second functional layer is a hole transport layer, and the second electrode layer is an anode layer; or
the first electrode layer is the anode layer, the first functional layer is the hole transport layer, the second functional layer is the electron transport layer, and the second electrode layer is the cathode layer.

13. The manufacturing method according to claim 1 , wherein the first functional layer comprises an electron transport layer, and
the manufacturing method further comprises: forming a cathode layer on the substrate before the forming the first functional layer on the substrate.

14. The manufacturing method according to claim 1 , wherein the quantum dot layer having the second polarity is in direct contact with the first functional layer.

15. A manufacturing method of a quantum dot display panel, comprising:
providing a driving substrate, wherein the driving substrate comprises a substrate and a first electrode layer on the substrate;
applying an electrical signal to the first electrode layer so that a region which is comprised by the driving substrate and which is provided with the first electrode layer exhibits a first polarity; and
forming a quantum dot layer having a second polarity on a side of the first electrode layer away from the substrate, wherein the second polarity and the first polarity are opposite electrical polarities.

16. The manufacturing method according to claim 15 , wherein the driving substrate further comprises a switch element on the substrate, and the switch element is electrically connected to the first electrode layer to apply the electrical signal to the first electrode layer.

17. A quantum dot display panel, comprising:
a substrate;
a first functional layer on the substrate, wherein the first functional layer comprises a processed region, and the first functional layer comprises ions having a first polarity in the processed region; and
a quantum dot light-emitting structure layer on a side of the first functional layer away from the substrate, wherein an orthographic projection of the quantum dot light-emitting structure layer on the first functional layer is located in the processed region, the quantum dot light-emitting structure layer comprises a quantum dot layer having a second polarity, and the second polarity and the first polarity are opposite electrical polarities.

18. The quantum dot display panel according to claim 17 , wherein
the first functional

Assignees

• Boe Technology Group Co Ltd

Inventors

• Mei Wenhai
• Zhang Xiaoyuan

Classifications

• H10H20/01

  Manufacture or treatment · CPC title

• H10F77/1433

  Quantum dots · CPC title

• H10H20/812 Primary

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

• H10K50/115

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

• H10K59/35

  comprising red-green-blue [RGB] subpixels · CPC title