BISCARBAZOLE DERIVATIVE AND ORGANIC ELECTROLUMINESCENCE ELEMENT USING SAME

• US 20140191225A1
• Filed: 08/15/2012
• Published: 07/10/2014
• Est. Priority Date: 08/18/2011
• Status: Abandoned Application

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: Inoue, Tetsuya, Ito, Mitsunori, Nishimura, Kazuki, Hibino, Kumiko
• Application Number:
  US14/237,887
• Publication Number:
  US 20140191225A1
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: C07D 403/14 containing three or more hetero rings
• CPC Class Codes: H10K 2102/103 comprising indium oxides, e.g. ITO
• CPC Class Codes: H10K 85/342 comprising iridium
• 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 85/636 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

Abstract

A biscarbazole derivative is represented by the following formula (1). A₁ and A₂ of the following formula (1) represent an aromatic hydrocarbon group having 6 to 30 ring carbon atoms or an aromatic heterocyclic group having 1 to 30 ring carbon atoms. However, at least one of A₁ and A₂ represents an aromatic heterocyclic group having 1 to 30 ring carbon atoms. Y₁ to Y₁₅ represent CR or a nitrogen atom. One of Y₈ to Y₁₁ is C (carbon atom) obtained by removing R from CR. The obtained C is bonded to L₃. R each independently represents a hydrogen atom, an aromatic hydrocarbon group or the like. L₁ to L₃ represent a single bond or a divalent linking group. When L₃ is a single bond and is bonded to Y₁₁, L₁ and L₂ are divalent linking groups.

Claims

1. A biscarbazole derivative represented by a formula (1) below,

2. The biscarbazole derivative according to claim 1, wherein

the biscarbazole derivative represented by the formula (1) is represented by the following formula (2), (3) or (4),

3. The biscarbazole derivative according to claim 1, wherein

the biscarbazole derivative represented by the formula (1) is represented by the following formula (3) or (4),

4. The biscarbazole derivative according to claim 1, wherein

L₃ in the formula (1) is a single bond.

5. The biscarbazole derivative according to claim 1, wherein

the aromatic heterocyclic group is a nitrogen-containing aromatic heterocyclic group.

6. The biscarbazole derivative according to claim 5, wherein

the nitrogen-containing aromatic heterocyclic group is a heterocyclic group having a pyrimidine skeleton or a heterocyclic group having a triazine skeleton.

7. The biscarbazole derivative according to claim 1, wherein

at least one of L₁ and L₂ in the formula (1) is a divalent group derived from a substituted or unsubstituted aromatic hydrocarbon compound having 6 to 30 ring carbon atoms, or a divalent group derived from a substituted or unsubstituted aromatic heterocyclic compound having 1 to 30 ring carbon atoms.

8. An organic electroluminescence device comprising:

a cathode;

an anode; and

an organic compound layer between the cathode and the anode, wherein

the organic compound layer comprises the biscarbazole derivative according to claim 1.

9. The organic electroluminescence device according to claim 8, wherein

the organic compound layer comprises a plurality of organic thin-film layers including an emitting layer, wherein

at least one of the plurality of organic thin-film layers comprises the biscarbazole derivative.

10. The organic electroluminescence device according to claim 9, wherein

the emitting layer comprises the biscarbazole derivative.

11. The organic electroluminescence device according to claim 9, wherein

the emitting layer comprises a phosphorescent material.

12. The organic electroluminescence device according to claim 11, wherein

the phosphorescent material comprises an ortho-metalated complex of a metal atom selected from iridium (Ir), osmium (Os) and platinum (Pt).

13. The organic electroluminescence device according to claim 10, wherein

the emitting layer further comprises an aromatic amine derivative.

14. The organic electroluminescence device according to claim 8, wherein

the plurality of organic thin-film layers comprise a hole transporting layer, the emitting layer and an electron transporting layer.

15. The biscarbazole derivative according to claim 2, wherein

L₃ in the formula (1) is a single bond.

16. The biscarbazole derivative according to claim 2, wherein

the aromatic heterocyclic group is a nitrogen-containing aromatic heterocyclic group.

17. The biscarbazole derivative according to claim 16, wherein

the nitrogen-containing aromatic heterocyclic group is a heterocyclic group having a pyrimidine skeleton or a heterocyclic group having a triazine skeleton.