Pixel definition layer, organic light-emitting device and manufacturing method thereof, display apparatus

Patent metadata

Field	Value
Publication number	US-10879322-B2
Application number	US-201716070405-A
Country	US
Kind code	B2
Filing date	Nov 24, 2017
Priority date	Mar 24, 2017
Publication date	Dec 29, 2020
Grant date	Dec 29, 2020

Abstract

A pixel definition layer is provided. The pixel definition layer includes: a base definition layer having a plurality of openings for defining pixel regions, and a first definition leer arranged on a side surface of at least one of the openings of the base definition layer, and a hydrophilic property of the base definition layer is different from a hydrophilic property of the first definition layer.

First claim

What is claimed is:

1. A pixel definition layer, comprising:
a base definition layer having a plurality of openings for defining pixel regions,
a first definition layer arranged on a side surface of at least one of the openings of the base definition layer, wherein a hydrophilic property of the base definition layer is different from a hydrophilic property of the first definition layer, and
a second definition layer arranged on a side surface of at least one of the openings of the base definition layer, the hydrophilic property of the base definition layer, the hydrophilic property of the first definition layer, and a hydrophilic property of the second definition layer are different from each other,
wherein a material of the base definition layer comprises a hydrophilic material or a first hydrophobic material, a material of the first definition layer comprises a second hydrophobic material, and a material of the second definition layer comprises a third hydrophobic material.

2. The pixel definition layer according to claim 1 , wherein the first hydrophobic material comprises at least one of fluorinated polyimide, fluorinated polymethyl methacrylate and fluorinated organo silicon;
the second hydrophobic material comprises at least one of fluorinated polyimide, fluorinated polymethyl methacrylate and fluorinated organosilicon; and
the third hydrophobic material comprises at least one of fluorinated polyimide, fluorinated polymethyl methacrylate and fluorinated organosilicon.

3. The pixel definition layer according to claim 2 , wherein the first hydrophobic material is same as the second hydrophobic material or the third hydrophobic material in base material but different from the second hydrophobic material or the third hydrophobic material in fluorination rate,
a ratio of fluorinated group to non-fluorinated group of the first hydrophobic material is less than that of the second hydrophobic material and that of the third hydrophobic material.

4. The pixel definition layer according to claim 1 , wherein the hydrophilic material comprises an inorganic hydrophilic material or an organic hydrophilic material,
the inorganic hydrophilic material comprises at least one of SiO 2 , SiN x and SiON x , and the organic hydrophilic material comprises at least one of polyimide, polymethyl methacrylate and organosilicon resin.

5. The pixel definition layer according to claim 1 , wherein a first contact angle of deionized water on the base definition layer is less than a second contact angle of deionized water on the first definition layer or the second definition layer, and the second contact angle is larger than the first contact angle by 30 to 90 degrees.

6. The pixel definition layer according to claim 5 , wherein a thickness of the base definition layer is from 3 μm to 50 μm, and thicknesses of the first definition layer and the second defined layer are from 1 μm to 3 μm.

7. The pixel definition layer according to claim 5 , further comprising: a third definition layer arranged on a side surface of at least one of the openings of the base definition layer, wherein the openings, in which the first definition layer, the second definition layer and the third definition layer are arranged respectively, are arranged in sequence or spaced apart from each other.

8. An organic light-emitting device, comprising:
a base substrate;
the pixel definition layer according to claim 1 is arranged on the base substrate; and
an organic functional layer disposed in the plurality of openings of the base definition layer.

9. The organic light-emitting device according to claim 8 , wherein the organic functional layer comprises a hole injection layer and an organic light-emitting layer which are stacked.

10. The organic light-emitting device according to claim 9 , wherein a material of the hole injection layer comprises polyaniline conducting polymers or polythiophene conducting polymers with at least one of alcohols, ethers and esters.

11. The organic light-emitting device according to claim 10 , wherein a third contact angle of the material of the hole injection layer on the base definition layer is 0 to 50 degrees, a fourth contact angle of the material of the hole injection layer on the first definition layer is 30 to 90 degrees, a fifth contact angle of the hole injection layer on the second definition layer is 30 to 90 degrees, and a difference between the fourth contact angle and the fifth contact angle is 0 to 10 degrees.

12. A display apparatus, comprising: the organic light-emitting device according to claim 8 .

13. A manufacturing method of a pixel definition layer, comprising:
forming a base definition layer having a plurality of openings for defining pixel regions,
forming a first definition layer on a side surface of at least one of the openings of the base definition layer, wherein a hydrophilic property of the base definition layer is different from a hydrophilic property of the first definition layer, and
forming a second definition layer on a side surface of at least one of the openings of the base definition layer, wherein the hydrophilic property of the base definition layer, the hydrophilic property of the first definition layer, and a hydrophilic property of the second definition layer are different from each other,
wherein a material of the base definition layer comprises a hydrophilic material or a first hydrophobic material, a material of the first definition layer comprises a second hydrophobic material, and a material of the second definition layer comprises a third hydrophobic material.

14. A manufacturing method of an organic light-emitting device, comprising:
providing a base substrate;
forming the pixel definition layer according to claim 1 on the base substrate; and
forming an organic functional layer in the plurality of openings of the base definition layer.

15. The manufacturing method according to claim 14 , wherein the organic functional layer comprises a hole injection layer and an organic light-emitting layer which are stacked arranged.

16. The manufacturing method according to claim 15 , wherein a third contact angle of a material of the hole injection layer on the base definition layer is 0 to 50 degrees, a fourth contact angle of the material of the hole injection layer on the first definition layer is 30 to 90 degrees, a fifth contact angle of the hole injection layer on the second definition layer is 30 to 90 degrees, and a difference between the fourth contact angle and the fifth contact angle is 0 to 10 degrees.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Hou Wenjun

Classifications

• H10K59/122 Primary

  Pixel-defining structures or layers, e.g. banks · CPC title

• H10K59/173 Primary

  comprising banks or shadow masks · CPC title

• H01L51/56

  Electricity · mapped topic

• H01L51/5088

  Electricity · mapped topic

• H01L51/5012

  Electricity · mapped topic