Arylamine compound useful in an organic electroluminescent device

• US 9,525,140 B2
• Filed: 10/02/2013
• Issued: 12/20/2016
• Est. Priority Date: 05/16/2008
• Status: Active Grant

• Current Assignee: Hodogaya Chemical Co., Ltd
• Original Assignee: Hodogaya Chemical Co., Ltd
• Inventors: Yokoyama, Norimasa, Kusano, Shigeru, Hayashi, Shuichi
• Primary Examiner(s): CLARK, GREGORY D
• Application Number:
  US14/044,335
• Publication Number:
  US 20140039221A1
• Time in Patent Office: 1,175 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: C07D 471/04 Ortho-condensed systems
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1014 bridged by heteroatoms, e.g. N, P, Si or B
• CPC Class Codes: H10K 50/14 Carrier transporting layers
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. 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 85/654 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

Abstract

A problem of the invention is to provide an organic EL device having a high efficiency, a low driving voltage and a long life, by combining various materials for organic EL device, which are excellent in an injection or transportation performance of holes or electrons, and in stability and durability in a thin film, so as to enable the respective materials to effectively reveal their characteristics. The invention relates to an organic electroluminescent device including at least an anode electrode, a hole-injecting layer, a hole-transporting layer, an emitting layer, an electron-transporting layer and a cathode electrode in this order, in which the hole-injecting layer contains an arylamine compound having, in its molecule, a structure in which three or more triphenylamine structures are connected through a single bond or a hetero atom-free divalent group; and the hole-transporting layer contains an arylamine compound having two triphenylamine structures in its molecule.

Claims

1. An arylamine compound represented by the following formula:

2. The arylamine compound according to claim 1, wherein n2 is 1.

3. The arylamine compound according to claim 1, wherein n2 is 2.

4. The arylamine compound according to claim 1, wherein r₂₅ to r₂₉ each is 1.

5. The arylamine compound according to claim 1, wherein the plurality of R₂₅ to R₂₉ is bonded on the same benzene ring and they are not bonded to each other to form a ring.

6. The arylamine compound according to claim 1, wherein at least one of Ar₅ and Ar₆ is a substituted aromatic hydrocarbon group.

7. The arylamine compound according to claim 1, wherein:

Ar₅ and Ar₆ both independently represent the formula;

8. The arylamine compound according to claim 1, which is: