Organic light emitting device and lighting apparatus comprising the same

Patent metadata

Field	Value
Publication number	US-9887376-B2
Application number	US-201515110550-A
Country	US
Kind code	B2
Filing date	Jan 9, 2015
Priority date	Jan 10, 2014
Publication date	Feb 6, 2018
Grant date	Feb 6, 2018

Abstract

The present specification relates to an organic light emitting device and a lighting apparatus comprising the same. An organic light emitting device according to an exemplary embodiment of the present specification is an organic light emitting device comprising a first electrode, a second electrode, and one or more organic material layers provided between the first electrode and the second electrode, and is characterized in that at least one layer of the organic material layers is a light emission layer comprising a first light emission material and a second light emission material, and a maximum light emission peak wavelength λmax of the second light emission material has a gap of 40 to 80 nm compared to a maximum light emission peak wavelength λmax of the first light emission material.

First claim

The invention claimed is:

1. An organic light emitting device comprising:
a first electrode;
a second electrode; and
one or more organic material layers provided between the first electrode and the second electrode,
wherein at least one layer of the organic material layers is a light emission layer comprising a first light emission material and a second light emission material, and
a maximum light emission peak wavelength λmax of the second light emission material has a gap of 40 to 80 nm compared to a maximum light emission peak wavelength λmax of the first light emission material,
wherein the light emission layer comprises a light emission host and a light emission dopant, and the light emission dopant comprises the first light emission material and the second light emission material.

2. The organic light emitting device of claim 1 , wherein the maximum light emission peak wavelength λmax of the second light emission material is 505 nm or more and 530 nm or less.

3. The organic light emitting device of claim 1 , wherein the maximum light emission peak wavelength λmax of the second light emission material is 515 nm.

4. The organic light emitting device of claim 1 , wherein the light emission layer comprises a fluorescent light emission host and a fluorescent light emission dopant, and
the fluorescent light emission dopant comprises the first light emission material and the second light emission material.

5. The organic light emitting device of claim 1 , wherein a concentration of the second light emission dopant is lower than a doping concentration of the first light emission material.

6. The organic light emitting device of claim 5 , wherein a content of the first light emission material within the light emission layer is 2 to 10 weight %, and a content of the second light emission material within the light emission layer is less than 1 weight %.

7. The organic light emitting device of claim 1 , wherein the light emission layer further comprises one or more of a red light emission material, a green light emission material, and a yellow light emission material.

8. The organic light emitting device of claim 1 , further comprising:
one or more light emission layers in addition to the light emission layer comprising the first light emission material and the second light emission material.

9. The organic light emitting device of claim 8 , further comprising:
an intermediate electrode or a charge generating layer provided between the light emission layers.

10. The organic light emitting device of claim 1 , wherein a color rendering index (CRI) of the organic light emitting device is 90% or more.

11. The organic light emitting device of claim 1 , wherein R9 of the organic light emitting device is 40% or more.

12. The organic light emitting device of claim 1 , wherein a correlated color temperature (CCT) of the organic light emitting device exceeds 3,000 K.

13. The organic light emitting device of claim 1 , wherein the organic light emitting device is a white organic light emitting device.

14. A lighting apparatus comprising the organic light emitting device of claim 1 .

15. An organic light emitting device comprising:
a first electrode;
a second electrode; and
one or more organic material layers provided between the first electrode and the second electrode,
wherein at least one layer of the organic material layers is a light emission layer comprising a first light emission material and a second light emission material, and
a maximum light emission peak wavelength λmax of the second light emission material has a gap of 40 to 80 nm compared to a maximum light emission peak wavelength λmax of the first light emission material, and
wherein the first light emission material is a blue light emission material, and the second light emission material is a bluish green light emission material.

16. The organic light emitting device of claim 15 , wherein the light emission layer comprises: the first light emission material, the second light emission material, a red light emission material, and a green light emission material; the first light emission material, the second light emission material, a red light emission material, and a yellow light emission material; or the first light emission material, the second light emission material, a red light emission material, a green light emission material, and a yellow light emission material.

17. The organic light emitting device of claim 15 , comprising:
a first light emission layer and a second light emission layer between the first electrode and the second electrode,
wherein the first light emission layer comprises at least one of the first light emission material, a green light emission material, a yellow light emission material, and a red light emission material, and
the second light emission layer comprises the first light emission material and the second light emission material.

18. The organic light emitting device of claim 17 , wherein the first light emission layer is a phosphorous light emission layer, and the second light emission layer is a fluorescent light emission layer.

19. The organic light emitting device of claim 15 , comprising:
a first light emission layer and a second light emission layer between the first electrode and the second electrode,
wherein the first light emission layer comprises a green light emission material and a red light emission material, or a green light emission material and a yellow light emission material, and
the second light emission layer comprises the first light emission material and the second light emission material.

20. The organic light emitting device of claim 15 , comprising:
a first light emission layer, a second light emission layer, and a third light emission layer between the first electrode and the second electrode,
wherein the first light emission layer comprises at least one of the first light emission material, a green light emission material, a yellow light emission material, and a red light emission material,
the second light emission layer comprises the first light emission material and the second light emission material, and
the third light emission layer comprises at least one of the first light emission material, a green light emission material, a yellow light emission material, and a red light emission material.

21. The organic light emitting device of claim 20 , wherein the first light emission layer and the third light emission layer are phosphorous light emission layers, and the second light emission layer is a fluorescent light emission layer.

22. The organic light emitting device of claim 15 , comprising:
a first light emission layer, a second light emission layer, and a third light emission layer between the first electrode and the second electrode,
wherein the first light emission layer comprises the first light emission material, a green light emission material and a red light emission material, or a green light emission material and a yellow light emission material,
the second light emission layer comprises the first light emission material and the second light emission material, and
the third light emission layer comprises a green light emission material and a red light emission material, or a green light emission material and a yellow light emission material.

Assignees

• Lg Display Co Ltd

Inventors

• Park Min Choon
• Lee Jaein
• Moon Jeamin
• You Jina
• Kim Ok Geun

Classifications

• H01L51/5024

  Electricity · mapped topic

• H01L51/5016

  Electricity · mapped topic

• H01L51/5036 Primary

  Electricity · mapped topic

• H01L2251/5361

  Electricity · mapped topic

• H10K50/15

  Hole transporting layers · CPC title