Packaging structure and packaging method of organic electroluminescent device, and display device

Patent metadata

Field	Value
Publication number	US-9362528-B2
Application number	US-201414436151-A
Country	US
Kind code	B2
Filing date	Aug 27, 2014
Priority date	Apr 29, 2014
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A packaging structure and a packaging method of an organic electroluminescent device, and a display device are provided. The packaging structure of the organic electroluminescent device comprises: a base substrate ( 1 ) for supporting the organic electroluminescent device ( 2 ); the organic electroluminescent device ( 2 ) located on the base substrate ( 1 ); at least one first thin film packaging layer ( 3 ) covering the organic electroluminescent device ( 2 ), the first thin film packaging layer ( 3 ) comprising an inorganic thin film ( 31 ), an organic polymer thin film ( 32 ) and a nano rod-shaped thin film ( 33 ) located between the inorganic thin film ( 31 ) and the organic polymer thin film ( 32 ). The packaging structure and the packaging method of the organic electroluminescent device can effectively improve a degree of integration between the inorganic thin film ( 31 ) and the organic polymer thin film ( 32 ), thus guaranteeing a service life of an OLED device.

First claim

What is claimed is:

1. A packaging structure of an organic electroluminescent device, comprising:
a base substrate for supporting the organic electroluminescent device;
the organic electroluminescent device located on the base substrate; and
at least one first thin film packaging layer covering the organic electroluminescent device, the first thin film packaging layer comprising an inorganic thin film, an organic polymer thin film and a nano rod-shaped thin film located between the inorganic thin film and the organic polymer thin film.

2. The packaging structure according to claim 1 , further comprising a second thin film packaging layer, the second thin film packaging layer comprising an inorganic thin film and an organic polymer thin film, and the second film layer being located above or below the first thin film packaging layer.

3. The packaging structure according to claim 1 , wherein a number of the at least one first thin film packaging layer is 1˜20.

4. The packaging structure according to claim 3 , wherein the number of the at least one first thin film packaging layer is 3˜5.

5. The packaging structure according to claim 2 , wherein a sum of numbers of the at least one first thin film packaging layer and the second thin film packaging layer is 2˜20.

6. The packaging structure according to claim 5 , wherein a sum of the numbers of the at least one first thin film packaging layer and the second thin film packaging layer is 3˜5.

7. The packaging structure according to claim 1 , wherein the inorganic thin film is made from one of a metal oxide, a metal sulfide and a metal nitride; and the nano rod-shaped thin film is made from one of a metal oxide, a metal sulfide and a metal nitride.

8. The packaging structure according to claim 1 , wherein the inorganic thin film and the nano rod-shaped thin film in the first thin film packaging layer are made from a material with a same chemical composition.

9. A display device, comprising the packaging structure of the organic electroluminescent device according to claim 1 .

10. A packaging method of an organic electroluminescent device, comprising:
providing a base substrate;
preparing the organic electroluminescent device on the base substrate; and
forming at least one first thin film packaging layer on the organic electroluminescent device, the first thin film packaging layer comprising an inorganic thin film, an organic polymer thin film and a nano rod-shaped thin film located between the inorganic thin film and the organic polymer thin film.

11. The packaging method according to claim 10 , wherein forming the first thin film packaging layer on the organic electroluminescent device includes:
forming the inorganic thin film on the organic electroluminescent device;
forming the nano rod-shaped thin film on the inorganic thin film; and
forming the organic polymer thin film on the nano rod-shaped thin film.

12. The packaging method according to claim 11 , wherein forming the nano rod-shaped thin film on the inorganic thin film includes:
forming the nano rod-shaped thin film on the inorganic thin film by vacuum evaporating, ion beam sputtering, magnetron-control sputtering deposition or atomic layer deposition, wherein an included angle between an injected particle flux for forming the nano rod-shaped thin film and a normal line of the inorganic thin film is 40°˜85°.

13. The packaging method according to claim 12 , further comprising: forming a second thin film packaging layer on the organic electroluminescent device, wherein the second thin film packaging layer comprises the inorganic thin film and the organic polymer thin film.

14. The packaging method according to claim 11 , wherein,
the number of the at least one first thin film packaging layer is 1˜20.

15. The packaging method according to claim 14 , wherein,
the number of the at least one first thin film packaging layer is 3˜5.

16. The packaging method according to claim 13 , wherein,
a sum of numbers of the at least one first thin film packaging layer and the second thin film packaging layer is 2˜20.

17. The packaging method according to claim 16 , wherein,
a sum of the numbers of the at least one first thin film packaging layer and the second thin film packaging layer is 3˜5.

18. The packaging method according to claim 10 , wherein,
the inorganic thin film is made from one of a metal oxide, a metal sulfide and a metal nitride; and the nano rod-shaped thin film is made from one of a metal oxide, a metal sulfide and a metal nitride.

19. The packaging structure according to claim 2 , wherein the inorganic thin film is made from one of a metal oxide, a metal sulfide and a metal nitride; and the nano rod-shaped thin film is made from one of a metal oxide, a metal sulfide and a metal nitride.

20. The packaging method according to claim 10 , further comprising: forming a second thin film packaging layer on the organic electroluminescent device, wherein the second thin film packaging layer comprises the inorganic thin film and the organic polymer thin film.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Yan Guang

Classifications

• H10K50/8445

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H10K59/8731 Primary

  multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers · CPC title

• H01L51/5256 Primary

  Electricity · mapped topic

• H01L51/5253

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic