Organic light-emitting diode (OLED) display panel, fabrication method and electronic device thereof

Patent metadata

Field	Value
Publication number	US-10763449-B2
Application number	US-201715677393-A
Country	US
Kind code	B2
Filing date	Aug 15, 2017
Priority date	Mar 31, 2017
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

An OLED display panel is provided. The OLED display panel comprises a first electrode; an opposite second electrode; and a plurality of stacking layers sandwiched between the first electrode and the second electrode. The plurality of stacking layers at least comprises a first auxiliary light-emitting layer and a light-emitting layer sequentially disposed on the first electrode. The first auxiliary light-emitting layer comprises a host material and a dopant material, and the dopant material comprises a compound of the following chemical formula (I):

where n is an integer equal to or larger than 1, X 1 , X 2 and X n+2 each independently has a chemical structure of

R′ is selected from any one of a substituted aryl group and a substituted heteroaryl group, and a substituent in the substituted aryl group and a substituent in the substituted heteroaryl group each includes at least one electron acceptor group.

First claim

What is claimed is:

1. An organic light-emitting diode (OLED) display panel, comprising:
a first electrode, a hole injection buffer layer, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and a second electrode sequentially stacked on a substrate, wherein:
the hole injection buffer layer is a first auxiliary light-emitting layer, and the electron transport layer is a second auxiliary light-emitting layer;
the first auxiliary light-emitting layer includes a host material and a dopant material, and the dopant material includes a compound of the following chemical formula:

 and
the host material includes a compound of the following chemical formula:

2. The OLED display panel according to claim 1 , wherein:
in the first auxiliary light-emitting layer, the dopant material has a volume percentage of less than or equal to approximately 10%.

3. The OLED display panel according to claim 1 , wherein:
the first auxiliary light-emitting layer has a thickness of equal to or smaller than approximately 150 Å.

4. The OLED display panel according to claim 1 , wherein
the second auxiliary light-emitting layer at least comprises a first electron type material.

5. The OLED display panel according to claim 4 , wherein:
the first electron type material at least comprises a first group,
wherein the first group has a conjugated structure containing at least three consecutive benzene rings, and at least one of carbon atoms on the at least three consecutive benzene rings is substituted with a nitrogen atom.

6. The OLED display panel according to claim 5 , wherein:
the first group comprise

7. The OLED display panel according to claim 1 , wherein:
the second auxiliary light-emitting layer is doped with an N-type dopant material.

8. The OLED display panel according to claim 7 , wherein:
the N-type dopant material is a second main group metal and compound, a third main group metal and compound or a rare earth metal.

9. The OLED display panel according to claim 8 , wherein:
the N-type dopant material is ytterbium.

10. The OLED display panel according to claim 7 , wherein:
in the second auxiliary light-emitting layer, the N-type dopant material has a doping volume percentage of approximately 1%-5%.

11. An electronic device, comprising:
an organic light-emitting diode (OLED) display panel that includes:
a first electrode, a hole injection buffer layer, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and a second electrode sequentially stacked on a substrate, wherein:
the hole injection buffer layer is a first auxiliary light-emitting layer, and the electron transport layer is a second auxiliary light-emitting layer;
the first auxiliary light-emitting layer includes a host material and a dopant material, and the dopant material includes a compound of the following chemical formula:

 and
the host material includes a compound of the following chemical formula:

Assignees

• Shanghai Tianma Am Oled Co Ltd

Inventors

• Ma Huihui
• Wang Xiangcheng
• Ren Hongyang
• Li Jie
• Hamada Yuji
• He Wei
• Liu Chen

Classifications

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• H10K85/00

  Organic materials used in the body or electrodes of devices covered by this subclass · CPC title

• H10K50/12

  comprising dopants · CPC title

• C09K11/025

  non-luminescent particle coatings or suspension media · CPC title

• C09K2211/1007

  Non-condensed systems · CPC title