Light-emitting element, light-emitting device, electronic device, lighting device, and novel organic compound

Patent metadata

Field	Value
Publication number	US-11008510-B2
Application number	US-201715601461-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	Aug 25, 2011
Publication date	May 18, 2021
Grant date	May 18, 2021

Abstract

A light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and the second compound is an organic compound having a pyrimidine skeleton. The light-emitting element includes an EL layer between a pair of electrodes. The EL layer contains a first compound and a second compound. The first compound is a phosphorescent iridium metal complex having a diazine skeleton, and the second compound is an organic compound having a pyrimidine skeleton.

First claim

The invention claimed is:

1. A light-emitting element comprising:
a first electrode;
a light-emitting layer over the first electrode; and
a second electrode over the light-emitting layer,
wherein the light-emitting layer is a stacked layer of two layers,
wherein one of the two layers comprises a first compound and a second compound,
wherein the first compound is a phosphorescent iridium metal complex including a quinoline skeleton, and
wherein the second compound includes a pyrimidine skeleton.

2. The light-emitting element according to claim 1 , wherein both of the two layers comprises the first compound and the second compound.

3. The light-emitting element according to claim 1 , wherein the phosphorescent iridium metal complex has a HOMO level of greater than or equal to −6.0 eV and less than or equal to −5.0 eV.

4. A light-emitting device comprising a display portion, wherein the display portion comprises the light-emitting element according to claim 1 .

5. A lighting device comprising the light-emitting device according to claim 4 .

6. An electronic device comprising the light-emitting device according to claim 5 , wherein the electronic device is any one of a video camera, a digital camera, a goggle type display, a navigation system, an audio reproducing device, a computer, a game machine, a portable information terminal, an image reproducing device and a television.

7. A light-emitting element comprising:
a first electrode;
a light-emitting layer over the first electrode; and
a second electrode over the light-emitting layer,
wherein the light-emitting layer is a stacked layer of two layers,
wherein one of the two layers comprises a first compound and a second compound,
wherein the first compound is a phosphorescent iridium metal complex including a quinoline skeleton,
wherein the phosphorescent iridium metal complex has a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and
wherein the second compound includes a pyrimidine skeleton.

8. The light-emitting element according to claim 7 , wherein both of the two layers comprises the first compound and the second compound.

9. The light-emitting element according to claim 7 , wherein the phosphorescent iridium metal complex has a HOMO level of greater than or equal to −6.0 eV and less than or equal to −5.0 eV.

10. A light-emitting device comprising a display portion, wherein the display portion comprises the light-emitting element according to claim 7 .

11. A lighting device comprising the light-emitting device according to claim 10 .

12. An electronic device comprising the light-emitting device according to claim 10 , wherein the electronic device is any one of a video camera, a digital camera, a goggle type display, a navigation system, an audio reproducing device, a computer, a game machine, a portable information terminal, an image reproducing device and a television.

13. A light-emitting element comprising:
a first electrode;
a light-emitting layer over the first electrode; and
a second electrode over the light-emitting layer,
wherein the light-emitting layer is a stacked layer of two layers,
wherein one of the two layers comprises a first compound and a second compound,
wherein the first compound is a guest,
wherein the second compound is a host,
wherein the first compound is a phosphorescent iridium metal complex including a quinoline skeleton,
wherein the phosphorescent iridium metal complex has a HOMO level of greater than or equal to −6.0 eV and less than or equal to −5.0 eV,
wherein the phosphorescent iridium metal complex has a LUMO level of greater than or equal to −3.5 eV and less than or equal to −2.5 eV, and
wherein the second compound includes a pyrimidine skeleton.

Assignees

• Semiconductor Energy Lab

Inventors

• Takeda Kyoko
• Osaka Harue
• Shitagaki Satoko
• Ohsawa Nobuharu
• Seo Satoshi
• Seo Hiromi

Classifications

• H10K50/00

  Organic light-emitting devices (integrated devices or assemblies of multiple devices H10K59/00, H10K65/00; organic semiconductor lasers H01S5/36) · CPC title

• C07D239/26

  with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to ring carbon atoms · CPC title

• C09K11/06 Primary

  containing organic luminescent materials · CPC title

• C09K2211/1044

  containing two nitrogen atoms as heteroatoms · CPC title

• C09K2211/1007

  Non-condensed systems · CPC title