Organic electroluminescent device

• US 20060099450A1
• Filed: 11/08/2005
• Published: 05/11/2006
• Est. Priority Date: 11/10/2004
• Status: Abandoned Application

• Current Assignee: UDC Ireland Limited
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Ogasawara, Jun
• Application Number:
  US11/268,650
• Publication Number:
  US 20060099450A1
• Time in Patent Office: Days
• US Class Current: 428/690
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• CPC Class Codes: C09K 2211/1033 with oxygen
• CPC Class Codes: C09K 2211/1037 with sulfur
• CPC Class Codes: C09K 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1059 containing three nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/182 of the rare earth metals, i.e. Sc, Y or lanthanide
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: C09K 2211/186 of the light metals other than alkali metals and alkaline earth metals, i.e. Be, Al or Mg
• CPC Class Codes: C09K 2211/187 of the iron group metals, i.e. Fe, Co or Ni
• CPC Class Codes: C09K 2211/188 of other metals not provided for in one of the previous groups
• CPC Class Codes: H05B 33/14 characterised by the chemical or physical composition or the arrangement of the electroluminescent material , or by the simultaneous addition of the electroluminescent material in or onto the light source
• 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 85/346 comprising platinum
• 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

An organic electroluminescent device comprising at least one organic layer between a pair of electrodes, wherein the organic layers include a luminescent layer, at least one of the organic layers comprises at least one metal complex containing a tri- or higher-dentate ligand, and a compound having a heterocyclic skeleton containing at least two heteroatoms is contained in the organic layer containing the metal complex and/or in other organic layer(s).

Claims

1. An organic electroluminescent device comprising at least one organic layer between a pair of electrodes, wherein the at least one organic layer includes a luminescent layer, at least one layer of the at least one organic layer comprises at least one metal complex containing a tri- or higher-dentate ligand, and a compound having a heterocyclic skeleton containing at least two heteroatoms is contained in the organic layer containing the metal complex and/or in other organic layer(s).

2. The organic electroluminescent device according to claim 1, wherein the ligand contained in the metal complex is a chained ligand.

3. The organic electroluminescent device according to claim 2, wherein the metal complex is a compound represented by formula (I):

4. The organic electroluminescent device according to claim 2, wherein the metal complex is a compound represented by formula (II):

5. The organic electroluminescent device according to claim 1, wherein the ligand contained in the metal complex is a cyclic ligand.

6. The organic electroluminescent device according to claim 5, wherein the metal complex is a compound represented by formula (III):

7. The organic electroluminescent device according to claim 1, wherein the compound having a heterocyclic skeleton containing at least two heteroatoms is a compound represented by formula (IV-1) or (IV-2).

8. The organic electroluminescent device according to claim 1, wherein a metal ion contained in the metal complex is selected from a platinum ion, an iridium ion, a rhenium ion, a palladium ion, a rhodium ion, a ruthenium ion, and a copper ion.

9. The organic electroluminescent device according to claim 1, wherein the compound having a heterocyclic skeleton containing at least two heteroatoms is contained in the luminescent layer.

10. The organic electroluminescent device according to claim 9, wherein a content of the compound having a heterocyclic skeleton containing at least two heteroatoms in the luminescent layer is 1 to 90% by weight based on a total solid content of the luminescent layer.

11. The organic electroluminescent device according to claim 1, wherein the compound having a heterocyclic skeleton containing at least two heteroatoms has a Ti level of 188.3 to 355.6 kJ/mol.

12. The organic electroluminescent device according to claim 1, wherein a content of the compound having a heterocyclic skeleton containing at least two heteroatoms in the organic layer containing the compound having a heterocyclic skeleton containing at least two heteroatoms is 10 to 99% by weight.

13. The organic electroluminescent device according to claim 1, wherein the weight ratio of the compound having a heterocyclic skeleton containing at least two heteroatoms to the metal complex containing a tri- or higher-dentate ligand is in the range of 50:

50 to 99;

1.

14. The organic electroluminescent device according to claim 1, wherein the tri- or higher-dentate ligand is quadridentate.

15. The organic electroluminescent device according to claim 1, wherein the tri- or higher-dentate ligand comprises a six-membered nitrogen-containing heterocycle.

16. The organic electroluminescent device according to claim 1, wherein a content of the metal complex containing a tri- or higher-dentate ligand in the organic layer containing the metal complex containing a tri- or higher-dentate ligand is 0.5 to 50% by weight.

17. The organic electroluminescent device according to claim 1, wherein the compound having a heterocyclic skeleton containing at least two heteroatoms and the metal complex containing a tri- or higher-dentate ligand are contained in the same organic layer.

18. The organic electroluminescent device according to claim 17, wherein the organic layer containing the compound having a heterocyclic skeleton containing at least two heteroatoms and the metal complex containing a tri- or higher-dentate ligand is the luminescent layer.