Composition useful as an organic water/oxygen barrier material, OLED display device and manufacturing method thereof

• US 9,768,412 B2
• Filed: 06/08/2015
• Issued: 09/19/2017
• Est. Priority Date: 06/16/2014
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd., Ordos Yuansheng Optoelectronics Co., Ltd. (BOE Technology Group Co., Ltd.)
• Original Assignee: BOE Technology Group Co., Ltd., ORDOS YUANSHENG OPTOELECTRONICS TECHNOLOGY CO., LTD.
• Inventors: Wu, Haidong
• Primary Examiner(s): Feliciano, Eliseo Ramos
• Assistant Examiner(s): Garcia, Joannie A
• Application Number:
  US14/892,295
• Publication Number:
  US 20160181569A1
• Time in Patent Office: 834 Days
• CPC Class Codes: C08G 2261/3424 non-conjugated, e.g. paracyclophanes or xylenes
• CPC Class Codes: C08G 2261/95 Use in organic luminescent diodes
• CPC Class Codes: C08K 3/34 Silicon-containing compounds
• CPC Class Codes: C08K 3/36 Silica
• CPC Class Codes: C08L 2205/02 containing two or more polymers of the same C08L -group
• CPC Class Codes: C08L 2205/035 containing four or more polymers in a blend
• CPC Class Codes: C08L 27/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C08L 29/04 Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
• CPC Class Codes: C08L 31/06 Homopolymers or copolymers of esters of polycarboxylic acids
• CPC Class Codes: C08L 65/04 Polyxylenes
• CPC Class Codes: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers
• CPC Class Codes: C09D 127/06 Homopolymers or copolymers of vinyl chloride
• CPC Class Codes: C09D 165/04 Polyxylylenes
• CPC Class Codes: H10K 2102/331 Nanoparticles used in non-emissive layers, e.g. in packaging layer
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/841 Self-supporting sealing arrangements
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 50/85 Arrangements for extracting light from the devices
• CPC Class Codes: H10K 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/141 comprising aliphatic or olefinic chains, e.g. poly N-vinylcarbazol, PVC or PTFE

Abstract

A composition which can be used as an organic water/oxygen barrier material, an OLED display device and manufacturing method thereof are disclosed. The composition includes: 15-25 wt % of parylene, 15-25 wt % of polyvinyl chloride, 5-15 wt % of acetone, 5-15 wt % of trichloroethylene, 10-20 wt % of polyvinyl acetate, 5-15 wt % of polyvinyl alcohol, 0-5 wt % of SiO₂ nanoparticles, and 8-12 wt % of an organic solvent, wherein all weight percent values are based on the total weight of the composition. When a water/oxygen barrier layer fabricated by the composition is disposed between a luminescent layer of OLED and a light extraction layer, water vapor and oxygen gas can be prevented from entering the OLED luminescent layer, thereby prolonging the service life of the OLED luminescent layer.

Claims

1. A composition comprising:

15-25 wt % of parylene,

15-25 wt % of polyvinyl chloride,

5-15 wt % of acetone,

5-15 wt % of trichloroethylene,

10-20 wt % of polyvinyl acetate,

5-15 wt % of polyvinyl alcohol,

0-5 wt % of SiO₂ nanoparticles, and

8-12 wt % of an organic solvent,

wherein all weight percent values are based on the total weight of he composition.

2. The composition claimed as claim 1, wherein the composition comprises 3 to 5 wt % of SiO₂ nanoparticles.

3. The composition claimed as claim 1, wherein the organic solvent is isopropanol or ethyl acetate.

4. The composition claimed as claim 1, wherein the average particle diameter of the SiO₂ nanoparticles is smaller than or equal to 50 nm.

5. An organic water/oxygen barrier material comprising the composition of claim 1.

6. An organic light-emitting diode (OLED) display device, comprising a water/oxygen baffler layer provided between an OLED luminescent layer and a light extraction layer, the water/oxygen barrier layer being formed by using the composition claimed as claim 1.

7. The OLED display device claimed as claim 6, further comprising an electrode disposed on a light exiting side of the OLED luminescent layer, the water/oxygen barrier layer being located between the electrode and the light extraction layer.

8. The OLED display device claimed as claim 6, wherein the water/oxygen barrier layer has a thickness in the range of 15 to 20 μ

m.

9. The organic water/oxygen barrier material claimed as claim 5, wherein the composition comprises 3 to 5 wt % of SiO₂ nanoparticles.

10. The organic water/oxygen barrier material claimed as claim 5, wherein the organic solvent is isopropanol or ethyl acetate.

11. The organic water/oxygen barrier material claimed as claim 5, wherein the average particle diameter of the SiO₂ nanoparticles is smaller than or equal to 50 nm.

12. The OLED display device claimed as claim 6, wherein the composition comprises 3 to 5 wt % of SiO₂ nanoparticles.

13. The OLED display device claimed as claim 6, wherein the organic solvent is isopropanol or ethyl acetate.

14. The OLED display device claimed as claim 6, wherein the average particle diameter of the SiO₂ nanoparticles is smaller than or equal to 50 nm.

15. A method for manufacturing an organic light-emitting diode (OLED) display device, comprising:

forming an OLED luminescent layer on a back panel;

forming a water/oxygen barrier layer on a light exiting side of the OLED luminescent layer, wherein, the water/oxygen barrier layer is formed by using the composition comprising;

15-25 wt % of parylene, 15-25 wt % of polyvinyl chloride, 5-15 wt % of acetone, 5-15 wt % of trichloroethylene, 10-20 wt % of polyvinyl acetate, 5-15 wt % of polyvinyl alcohol, 0-5 wt % of SiO₂ nanoparticles, and 8-12 wt % of an organic solvent, wherein all weight percent values are based on the total weight of the composition

forming a light extraction layer on a light exiting side of the water/oxygen barrier layer; and

performing encapsulation.

16. The manufacturing method claimed as claim 15, wherein forming the water/oxygen barrier layer on the light exiting side of the OLED luminescent layer includes:

coating or depositing the composition on a surface of the OLED luminescent layer;

curing the composition.

17. The manufacturing method claimed as claim 16, wherein the curing is performed by way of drying or heating.

18. The method claimed as claim 15, wherein the composition comprises 3 to 6 wt % of SiO₂ nanoparticles.

19. The method claimed as claim 15, wherein the organic solvent is isopropanol or ethyl acetate.

20. The method claimed as claim 15, wherein the average particle diameter of the SiO₂ nanoparticles is smaller than or equal to 50 nm.