Organic light-emitting display panel and fabricating method

Patent metadata

Field	Value
Publication number	US-11228018-B2
Application number	US-201715478680-A
Country	US
Kind code	B2
Filing date	Apr 4, 2017
Priority date	Dec 28, 2016
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

An organic light-emitting display panel and a fabrication method thereof are provided. The organic light-emitting display panel comprises a substrate; an organic light-emitting device disposed on a side of the substrate, wherein the organic light-emitting device has a first side facing the substrate and an opposing side; and an encapsulation layer disposed on the opposing side of the organic light-emitting device. The encapsulation layer includes at least one organic encapsulation layer, and the at least organic encapsulating layer has a polymer network of cross-linked polyorganosiloxane.

First claim

What is claimed is:

1. An organic light-emitting display panel, comprising:
a substrate;
an organic light-emitting device disposed on a side of the substrate, wherein the organic light-emitting device has a first side facing the substrate and an opposing side; and
an encapsulation layer disposed on the opposing side of the organic light-emitting device, wherein the encapsulation layer includes at least one organic encapsulation layer, and the at least one organic encapsulation layer includes a polymer network of cross-linked polyorganosiloxane formed by cross-linking at least one component (i) polyorganosiloxane having a block structure of the following chemical formula (Q-1) with at least one component (ii) polyorganosiloxane having a block structure of the following chemical formula (Q-2),

wherein in the chemical formula (Q-1) and chemical formula (Q-2),
at least one of R 1 and R 2 is a photo-curable functional group comprising one of

wherein R 10 and R 12 each is selected from a substituted or unsubstituted alkylene, the alkylene is a group has two hydrogens removed from a corresponding hydrocarbon, and R 11 is a substituted or unsubstituted hydrocarbon;
one of R 4 and R 5 is a mercaptoalkyl comprising R 4 ′—S—H and R 5 ′—S—H, respectively, wherein R 4 ′ is an alkyl corresponding to R 4 and R 5 ′ is an alkyl corresponding to R 5 ;
each of un-crosslinked R 1 and un-crosslinked R 2 is selected from a group consisting of hydrogen, a substituted or unsubstituted hydrocarbon, a substituted or unsubstituted aromatic base, and a substituted or unsubstituted polysiloxane, and
when one of R 4 and R 5 is a mercaptoalkyl, the other of R 4 and R 5 includes at least one selected from or a combination of at least two selected from hydrogen, a substituted or unsubstituted hydrocarbon, a substituted or unsubstituted polysiloxane, and a photo-curable functional group, and

wherein the polymer network of cross-linked polyorganosiloxane at least includes a chemical structure of

formed by a photo-curing reaction between the photo-curable functional group and the mercaptoalkyl, wherein

includes one of

and R 7 includes one of R 4 ′ and R 5 ′.

2. The organic light-emitting display panel according to claim 1 ,
wherein:
in the component (i) polyorganosiloxane, a number of substituted siloxane repeating units having the photo-curable functional group accounts for approximately more than 50% of a total number of the siloxane repeating units to provide the encapsulation material with increased flexibility and light transmission; and
in the component (ii) polyorganosiloxane, a number of substituted siloxane repeating units having mercaptoalkyl accounts for approximately more than 50% of a total number of the siloxane repeating units.

3. The organic light-emitting display panel according to claim 1 ,
wherein:
each of the un-crosslinked R 1 and the un-crosslinked R 2 is selected from a group consisting of hydrogen, a substituted or unsubstituted C 1 -C 6 alkyl, a substituted or unsubstituted C 6 to C 12 aryl; and
the mercaptoalkyl is a substituted or unsubstituted C 1 to C 10 mercaptoalkyl.

4. The organic light-emitting display panel according to claim 3 ,
wherein:
the photo-curable functional group is selected from a group consisting of vinyl, allyl, alkenyl,

ethynyl, propargyl, acetylene, 2-methylallyl, and 2-methylpentyl.

5. The organic light-emitting display panel according to claim 1 ,
wherein:
the at least one organic encapsulation layer has a thickness of approximately 1 to 20 μm.

6. The organic light-emitting display panel according to claim 1 ,
wherein the encapsulation layer includes:
the at least one organic encapsulation layer and at least one inorganic encapsulation layer alternately disposed,
wherein a layer which is disposed closest to the organic light-emitting device is the at least one organic encapsulation layer to provide the organic light-emitting display panel with increased flexibility.

7. The organic light-emitting display panel according to claim 6 ,
wherein:
the at least one organic encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer, and
the encapsulation layer includes the first organic encapsulation layer, a first inorganic encapsulation layer, and the second organic encapsulation layer sequentially disposed on the side of the organic light-emitting display panel.

8. The organic light-emitting display panel according to claim 1 ,
wherein the encapsulation layer includes:
the at least one organic encapsulation layer and at least one inorganic encapsulation layer alternately disposed,
wherein a layer which is disposed closest to the organic light-emitting device is the at least one inorganic encapsulation layer.

9. The organic light-emitting display panel according to claim 8 ,
wherein:
the at least one organic encapsulation layer includes a first organic encapsulation layer and a second organic encapsulation layer, and
the encapsulation layer includes the first inorganic encapsulation layer, a first organic encapsulation layer, and the second inorganic encapsulation layer sequentially disposed on the side of the organic light-emitting display panel.

10. The organic light-emitting display panel according to claim 6 ,
wherein:
the at least one inorganic encapsulation layer has a thickness smaller than approximately 1 μm; and
the at least one inorganic encapsulation layer includes at least one of metal oxide, metal nitride, metal carbide, and metal oxynitride.

11. The organic light-emitting display panel according to claim 10 ,
wherein:
the at least one inorganic encapsulation layer includes silicon nitride or aluminum oxide.

12. The organic light-emitting display panel according to claim 1 ,
the polyorganosiloxane component (i) has a polymerization degree of 1 to 100, and
the polyorganosiloxane component (ii) has a polymerization degree of 1 to 100.

13. An organic light-emitting display panel, comprising:
a substrate;
an organic light-emitting device disposed on a side of the substrate, wherein the organic light-emitting device has a first side facing the substrate and an opposing side; and
an encapsulation layer disposed on the opposing side of the organic light-emitting device, wherein the encapsulation layer includes at least one organic encapsulation layer, and the at least one organic encapsulation layer includes a polymer network of cross-linked polyorganosiloxane formed by cross-linking at least one component (i) polyorganosiloxane having a block structure of the following chemical formula (Q-1) with at least one component (ii) polyorganosiloxane having a block structure of the following chemical formula (Q-2),

wherein in the chemical formula (Q-1) and chemical formula (Q-2),
at least one of R 1 and R 2 is a photo-curable functional

Assignees

• Shanghai Tianma Am Oled Co Ltd
• Tianma Micro Electronics Co Ltd

Inventors

• Jin Jian
• Su Congyi

Classifications

• H10K71/00 Primary

  Manufacture or treatment specially adapted for the organic devices covered by this subclass · CPC title

• H10K59/873

  Encapsulations · CPC title

• H10K50/844

  Encapsulations · CPC title

• C09D183/04 Primary

  Polysiloxanes · CPC title

• C08G77/28

  sulfur-containing groups · CPC title