Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Heterocyclic Compound

• US 20140034931A1
• Filed: 08/02/2013
• Published: 02/06/2014
• Est. Priority Date: 08/03/2012
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Inoue, Hideko, Morikubo, Miyako, Hashimoto, Naoaki, Seo, Hiromi, Seo, Satoshi, Kanamoto, Miki, Nakagawa, Tomoka
• Granted Patent: US 9,412,953 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: C07D 409/10 linked by a carbon chain containing aromatic rings
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2101/40 Interrelation of parameters between multiple constituent active layers or sublayers, e.g. HOMO values in adjacent layers
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/12 comprising dopants
• CPC Class Codes: H10K 50/16 Electron transporting layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/636 comprising heteroaromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/654 comprising only nitrogen as heteroatom H10K85/652 takes precedence
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: H10K 85/6576 comprising only sulfur in the heteroaromatic polycondensed ring system, e.g. benzothiophene

Abstract

A light-emitting element with high heat resistance and high emission efficiency is provided. A novel heterocyclic compound that can be used in such a light-emitting element is provided. One embodiment of the present invention is a light-emitting element which includes, between a pair of electrodes, a layer containing a first organic compound, a second organic compound, and a light-emitting substance; the first organic compound includes one pyrimidine ring and one ring with a hole-transport skeleton; the second organic compound is an aromatic amine; and the light-emitting substance converts triplet excitation energy into light. A combination of the first organic compound, which includes the one pyrimidine ring and the one ring with the hole-transport skeleton, and the second organic compound, which is the aromatic amine, forms an exciplex.

Claims

1. An organic compound represented by a formula (G1):

2. The organic compound according to claim 1, wherein the organic compound is represented by a formula (G2):

3. The organic compound according to claim 1, wherein the organic compound is represented by a formula (100):

4. The organic compound according to claim 1, wherein the organic compound is represented by a formula (101):

5. A light-emitting element comprising the organic compound according to claim 1,

wherein the light-emitting element further comprises a layer between a pair of electrodes, and

wherein the layer comprises the organic compound.

6. A light-emitting element comprising the organic compound according to claim 1, wherein the light-emitting element further comprises:

a layer between a pair of electrodes, the layer comprising;

the organic compound;

an aromatic amine; and

a phosphorescent compound,

wherein a combination of the organic compound and the aromatic amine is configured to form an exciplex.

7. The light-emitting element according to claim 6, further comprising an electron-transport layer between the layer and one of the pair of electrodes, wherein the electron-transport layer comprises the organic compound.

8. A light-emitting device comprising the light-emitting element according to claim 6.

9. An electronic device comprising the light-emitting device according to claim 8.

10. A lighting device comprising the light-emitting device according to claim 8.

11. A light-emitting element comprising:

a layer between a pair of electrodes, the layer comprising;

an organic compound comprising a pyrimidine ring;

an aromatic amine; and

a phosphorescent compound,

wherein a combination of the organic compound and the aromatic amine is configured to form an exciplex.

12. The light-emitting element according to claim 11, wherein the organic compound further comprises a ring including a hole-transport skeleton.

13. The light-emitting element according to claim 11, wherein the organic compound has a molecular weight greater than or equal to 400 and less than or equal to 1200.

14. The light-emitting element according to claim 12, wherein the ring including the hole-transport skeleton is a carbazole ring, a dibenzothiophene ring, or a dibenzofuran ring.

15. The light-emitting element according to claim 11, wherein the aromatic amine comprises a pyrimidine skeleton.

16. A light-emitting device comprising the light-emitting element according to claim 11.

17. An electronic device comprising the light-emitting device according to claim 16.

18. A lighting device comprising the light-emitting device according to claim 16.