CARBAZOLE-BASED COMPOUND AND ORGANIC LIGHT-EMITTING DEVICE INCLUDING ORGANIC LAYER INCLUDING THE CARBAZOLE-BASED COMPOUND

• US 20080174237A1
• Filed: 10/29/2007
• Published: 07/24/2008
• Est. Priority Date: 01/18/2007
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung SDI Company Limited
• Inventors: HWANG, Seok-Hwan, KIM, Young-Kook, Kwak, Yoon-Hyun
• Granted Patent: US 7,816,021 B2
• Time in Patent Office: Days
• US Class Current: 313/504
• CPC Class Codes: C07D 403/14 containing three or more hetero rings
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/17 Carrier injection layers
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

Provided are a carbazole-based compound represented by Formula 1 below and an organic light-emitting device including an organic layer including the carbazole-based compound:

• • wherein R₁, R₂, R₃, R₄, R₅, R₆, R₇, R₈, R₉, R₁₀, R₁₁, R₁₂, R₁₃, and R₁₄ are as defined in the specification. The carbazole-based compound has good electrical characteristics and charge transport capability, and thus, is useful as a hole injection material, a hole transport material, and/or an emitting material for fluorescent or phosphorescent devices capable of producing light of a full spectrum of colors, including red, green, blue, and white, thereby making it possible to produce an organic light-emitting device with high efficiency, a low driving voltage, and high brightness.

Claims

1. A carbazole-based compound represented by Formula 1 below:

2. The carbazole-based compound of claim 1, which is a compound selected from compounds represented by Formulae 2 through 4 below:

3. The carbazole-based compound of claim 1, wherein R₁, R₂, R₃, and R₄ are each independently a substituted or unsubstituted C₁-C₁₀ alkyl group, a substituted or unsubstituted C₁-C₁₀ alkoxy group, a substituted or unsubstituted C₆-C₁₂ aryl group, a substituted or unsubstituted C₆-C₁₂ aryloxy group, or a substituted or unsubstituted C₃-C₁₂ heteroaryl group.

4. The carbazole-based compound of claim 1, wherein R₁, R₂, R₃, and R₄ are each independently a C₁-C₁₀ alkyl group, a phenyl group, a halophenyl group, a cyanophenyl group, a C₁-C₁₀ alkylphenyl group, a C₁-C₁₀ alkoxyphenyl group, a biphenyl group, a halobiphenyl group, a naphthyl group, a halonaphthyl group, a C₁-C₁₀ alkylnaphthyl group, or a C₁-C₁₀ alkoxynaphthyl group.

5. The carbazole-based compound of claim 1, which is selected from compounds 1-27 below:

6. An organic light-emitting device comprising:

a first electrode;

a second electrode; and

one or more organic layers interposed between the first electrode and the second electrode, wherein at least one of the one or more organic layers comprises the carbazole-based compound of claim 1.

7. The organic light-emitting device of claim 6, wherein the organic layer comprising the carbazole-based compound is a hole injection layer or a hole transport layer.

8. The organic light-emitting device of claim 6, wherein the organic layer comprising the carbazole-based compound is a single layer having both a hole injection capability and a hole transport capability.

9. The organic light-emitting device of claim 7, which has one of the following structures:

first electrode/hole injection layer/emitting layer/second electrode;

first electrode/hole injection layer/hole transport layer/emitting layer/electron transport layer/second electrode;

or

first electrode/hole injection layer/hole transport layer/emitting layer/electron transport layer/electron injection layer/second electrode.

10. The organic light-emitting device of claim 9, further comprising at least one of a hole blocking layer and an electron blocking layer.

11. The organic light-emitting device of claim 8, which has one of the following structures:

first electrode/single layer having hole injection capability and hole transport capability/emitting layer/electron transport layer/second electrode or

first electrode/single layer having hole injection capability and hole transport capability/emitting layer/electron transport layer/electron injection layer/second electrode.

12. The organic light-emitting device of claim 11, further comprising at least one of a hole blocking layer and an electron blocking layer.

13. The organic light-emitting device of claim 6, wherein the organic layer comprising the carbazole-based compound is an emitting layer.

14. The organic light-emitting device of claim 13, wherein the emitting layer comprises a phosphorescent or fluorescent material.

15. An organic light-emitting device comprising a hole injection layer or a hole transport layer or a single layer having both hole injection and hole transport capabilities comprising the carbazole-based compound of claim 1.

16. The organic light-emitting device comprising an emitting layer comprising the carbazole-based compound of claim 1.