OLED device and method for fabricating the same

• US 10,453,907 B2
• Filed: 07/23/2018
• Issued: 10/22/2019
• Est. Priority Date: 08/21/2017
• Status: Active Grant

• Current Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Original Assignee: Wuhan China Star Optoelectronics Semiconductor Display Technology Ltd.
• Inventors: Huang, Jing
• Primary Examiner(s): Ghyka, Alexander G
• Application Number:
  US16/041,844
• Publication Number:
  US 20190058025A1
• Time in Patent Office: 456 Days
• Field of Search: None
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/8445 multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/124 Insulating layers formed between TFT elements and OLED elements
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing

Abstract

The present disclosure relates to an OLED device and a method for preparing the same. The method includes: providing an OLED basic device; forming a hydrophobic layer selectively covering a light emitting side surface of the OLED basic device by an ink jet printing method; forming an optical coupling efficiency enhancing layer on an area of the light emitting side surface in a selective atom precipitation way, which may not be covered by the hydrophobic layer. The optical coupling efficiency enhancing layer is formed between adjacent hydrophobic layers to form a periodic distribution array, thereby improving the optical coupling efficiency of the OLED device.

Claims

1. A method for fabricating an OLED device, comprising:

providing an OLED basic device;

wherein the OLED basic device has a light emitting side surface;

forming a first water-oxygen barrier layer on the light emitting side surface;

forming a first stress release layer on the first water-oxygen barrier layer;

forming a second water-oxygen barrier layer on the first stress release layer;

forming a hydrophobic layer selectively covering a light emitting side surface of the OLED basic device by an ink jet printing manner;

forming an optical coupling efficiency enhancing layer on an area of the light emitting side surface in a selective atom precipitation way, which is not be covered by the hydrophobic layer;

wherein, the light emitting side surface is divided into light emitting regions arranged periodically and spaced, and non-light emitting regions located between the light emitting regions;

the optical coupling efficiency enhancement layer covers the light emitting region, and the hydrophobic layer is disposed in the non-light emitting region;

the hydrophobic layer and the optical coupling efficiency enhancement layer are formed on the second water-oxygen barrier layer.

2. The method according to claim 1, wherein the hydrophobic layer is made of a polymer material, and the light coupling efficiency enhancing layer is made of metal oxides.

3. The method according to claim 1, after the forming the optical coupling efficiency enhancing layer on the area of the light emitting side surface in the selective atom precipitation way, which is not covered by the hydrophobic layer, further comprising:

forming at least one of a third water-oxygen barrier layer and a second stress release layer both on the hydrophobic layer and the optical coupling efficiency enhancement layer.

4. The method according to claim 3, wherein the first and the second water-oxygen barrier layer are made of an inorganic material, and the first stress release layer is made of an organic material.

5. The method according to claim 1, after the forming the optical coupling efficiency enhancing layer on the area of the light emitting side surface in the selective atom precipitation way, which is not be covered by the hydrophobic layer, further comprising:

removing the hydrophobic layer.

6. The method according to claim 5, after the removing the hydrophobic layer, further comprising:

forming at least one of a third water-oxygen barrier layer and a second stress release layer on the layer and the exposed area of the optical coupling efficiency enhancement layer.

7. The method according to claim 5, wherein the removing the hydrophobic layer comprises:

removing the hydrophobic layer by means of one of plasma, cleaning and laser engraving.

8. The method according to claim 1, wherein a thickness of the hydrophobic layer is greater than that of the light coupling efficiency enhancement layer.

9. A method for fabricating an OLED device, comprising:

providing an OLED basic device;

wherein the OLED basic device has a light emitting side surface;

forming a hydrophobic layer selectively covering a light emitting side surface of the OLED basic device by an ink jet printing manner;

forming an optical coupling efficiency enhancing layer on an area of the light emitting side surface in a selective atom precipitation way, which is not covered by the hydrophobic layer.

10. The method according to claim 9, wherein the hydrophobic layer is made of a polymer material, and the light coupling efficiency enhancing layer is made of metal oxides.

11. The method according to claim 9, wherein the light emitting side surface is divided into light emitting regions arranged periodically and spaced, and non-light emitting regions located between the light emitting regions;

the optical coupling efficiency enhancement layer covers the light emitting region, and the hydrophobic layer is disposed in the non-light emitting region.

12. The method according to claim 9, before the forming the hydrophobic layer selectively covering the light emitting side surface of the OLED basic device by the ink jet printing manner, further comprising:

forming a first water-oxygen barrier layer on the light emitting side surface;

forming a first stress release layer on the first water-oxygen barrier layer;

forming a forming a second water-oxygen barrier layer on the first stress release layer;

wherein the hydrophobic layer and the optical coupling efficiency enhancement layer are formed on the second water-oxygen barrier layer.

13. The method according to claim 12, wherein the first and the second water-oxygen barrier layer are made of an inorganic material, and the first stress release layer is made of an organic material.

14. The method according to claim 9, after the forming the optical coupling efficiency enhancing layer on the area of the light emitting side surface in the selective atom precipitation way, which is not covered by the hydrophobic layer, further comprising:

forming at least one of a third water-oxygen barrier layer and a second stress release layer both on the hydrophobic layer and the optical coupling efficiency enhancement layer.

15. The method according to claim 9, after the forming the optical coupling efficiency enhancing layer on the area of the light emitting side surface in the selective atom precipitation way, which is not covered by the hydrophobic layer, further comprising:

removing the hydrophobic layer.

16. The method to claim 15, after the removing the hydrophobic layer, further comprising:

forming at least one of a third water-oxygen barrier layer and a second stress release layer on the layer and the exposed area of the optical coupling efficiency enhancement layer.

17. The method according to claim 15, wherein the removing the hydrophobic layer comprises:

removing the hydrophobic layer by means of one of plasma cleaning and laser engraving.

18. The method according to claim 12, wherein a thickness of the hydrophobic layer is greater than that of the light coupling efficiency enhancement layer.