Organic light emitting device and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-9559327-B2
Application number	US-201414917686-A
Country	US
Kind code	B2
Filing date	Sep 11, 2014
Priority date	Sep 13, 2013
Publication date	Jan 31, 2017
Grant date	Jan 31, 2017

Abstract

An organic light-emitting device includes: an anode; a wiring that is disposed side-by-side with and spaced from the anode; a light-emitting layer that is disposed above the anode, and includes an organic light-emitting material; an intermediate layer that is disposed above the light-emitting layer and the wiring; an organic functional layer that is disposed above the intermediate layer, and has an electron injection property or an electron transport property; a cathode that is disposed above the organic functional layer. The intermediate layer includes: a fluoride of a first metal, the first metal being an alkali metal or an alkaline-earth metal; and a second metal that has a property of cleaving a bond between the first metal and fluorine in the fluoride.

First claim

The invention claimed is:

1. An organic light-emitting device comprising:
an anode;
a wiring that is disposed side-by-side with and spaced from the anode;
a light-emitting layer that is disposed above the anode, and includes an organic light-emitting material;
an intermediate layer that is disposed above the light-emitting layer and the wiring;
an organic functional layer that is disposed above the intermediate layer, and has an electron injection property or an electron transport property;
a cathode that is disposed above the organic functional layer, wherein
the intermediate layer includes:
a fluoride of a first metal, the first metal being an alkali metal or an alkaline-earth metal; and
a second metal that has a property of cleaving a bond between the first metal and fluorine in the fluoride.

2. The organic light-emitting device of claim 1 , wherein
the fluoride is sodium fluoride (NaF) or lithium fluoride (LiF).

3. The organic light-emitting device of claim 1 , wherein
the second metal is barium (Ba).

4. The organic light-emitting device of claim 1 , wherein
the second metal has an electron injection property or an electron transport property, and
the organic functional layer includes the same metal as the second metal.

5. The organic light-emitting device of claim 1 , wherein
the anode and the wiring are made of the same material.

6. The organic light-emitting device of claim 1 , wherein
the anode is made of indium tin oxide (ITO) or indium zinc oxide (IZO).

7. The organic light-emitting device of claim 1 , wherein
the cathode is made of a transparent conductive material.

8. The organic light-emitting device of claim 7 , wherein
the transparent conductive material is ITO.

9. The organic light-emitting device of claim 1 , further comprising
a hole injection layer that is disposed on each of the anode and the wiring, and is made of tungsten oxide (WO x ) or molybdenum oxide (MoO x ).

10. The organic light-emitting device of claim 1 , wherein
the organic functional layer has a thickness of 25 nm to 45 nm inclusive.

11. The organic light-emitting device of claim 1 , wherein
the organic functional layer has a thickness of 30 nm to 40 nm inclusive.

12. A manufacturing method of an organic light-emitting device, the manufacturing method comprising:
forming an anode and a wiring so as to be disposed side-by-side with and spaced from each other;
forming, above the anode, a light-emitting layer that includes an organic light-emitting material;
forming, above the light-emitting layer and the wiring, an intermediate layer;
forming, above the intermediate layer, an organic functional layer that has an electron injection property or an electron transport property;
forming, above the organic functional layer, a cathode, wherein
the intermediate layer includes:
a fluoride of a first metal, the first metal being an alkali metal or an alkaline-earth metal; and
a second metal that has a property of cleaving a bond between the first metal and fluorine in the fluoride.

13. The manufacturing method of claim 12 , wherein
the forming the intermediate layer includes
depositing the fluoride above the light-emitting layer and the wiring, and depositing the second metal above the fluoride.

Assignees

• Joled Inc

Inventors

• Yoneda Kazuhiro
• Hoang Minhhiep
• Matsusue Noriyuki
• Hashimoto Jun
• Nishimura Masaki

Classifications

• H10K59/873

  Encapsulations · CPC title

• H10K50/814

  combined with auxiliary electrodes, e.g. ITO layer combined with metal lines · CPC title

• H10K59/131 Primary

  Interconnections, e.g. wiring lines or terminals · CPC title

• H01L27/3211

  Electricity · mapped topic

• H01L27/3276

  Electricity · mapped topic