MATERIAL FOR ORGANIC ELECTROLUMINESCENCE DEVICE AND ORGANIC ELECTROLUMINESCENCE DEVICE

• US 20130264548A1
• Filed: 02/27/2013
• Published: 10/10/2013
• Est. Priority Date: 02/29/2012
• Status: Active Grant

• Current Assignee: Idemitsu Kosan Company Limited
• Original Assignee: Idemitsu Kosan Company Limited
• Inventors: MIZUKI, Yumiko, INOUE, Tetsuya, YABUNOUCHI, Nobuhiro, HIBINO, Kumiko, NISHIMURA, Kazuki
• Granted Patent: US 9,130,174 B2
• 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: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• CPC Class Codes: C09K 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1029 containing one nitrogen atom as the heteroatom
• 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 2211/1088 containing oxygen as the only heteroatom
• CPC Class Codes: C09K 2211/1092 containing sulfur as the only heteroatom
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 2101/90 Multiple hosts in the emissive layer
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 comprising iridium
• 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 material for organic EL device which includes a compound having a specific structure: an azine ring having a cyano-substituted aromatic hydrocarbon group, an azine ring having a cyano-substituted heterocyclic group, or an azine ring having a cyano group directly bonded to the azine ring. An organic electroluminescence device including an organic thin film layer between a cathode and an anode, wherein the organic thin film layer includes a light emitting layer and at least one layer containing the material for organic electroluminescence device, has a long lifetime.

Claims

1. A material for organic electroluminescence device represented by formula (I);

2. The material for organic electroluminescence device according to claim 1, represented by formula (II):

3. The material for organic electroluminescence device according to claim 1, represented by formula (III):

4. The material for organic electroluminescence device according to claim 1, wherein X⁷ and Y³ are bonded to each other via L¹ or directly.

5. The material for organic electroluminescence device according to claim 1, wherein X⁶ and Y² are bonded to each other via L¹ or directly.

6. The material for organic electroluminescence device according to claim 1, wherein X⁶ and Y³ are bonded to each other via L¹ or directly.

7. The material for organic electroluminescence device according to claim 1, wherein Az represents a q+1 valent residue of a ring selected from the group consisting of a substituted or unsubstituted pyrimidine ring, a substituted or unsubstituted triazine ring, a substituted or unsubstituted pyridine ring, and a substituted or unsubstituted quinazoline ring.

8. The material for organic electroluminescence device according to claim 1, wherein L¹ represents a phenylene group and n represents an integer of 1 to 3, or L¹ represents a single bond and n represents 0.

9. The material for organic electroluminescence device according to claim 1, wherein W represents a cyano-substituted phenyl group, a cyano-substituted biphenyl group, a cyano-substituted 9,9-diphenylfluorenyl group, a cyano-substituted 9,9′

-spirobi[9H-fluorene]-2-yl group, a cyano-substituted 9,9-dimethylfluorenyl group, a cyano-substituted dibenzofuranyl group, or a cyano-substituted dibenzothiophenyl group.

10. The material for organic electroluminescence device according to claim 1, wherein each of sa, sb, sc, ta, tb, and tc represents 0 or 1.

11. The material for organic electroluminescence device according to claim 1, wherein each of ta, tb and tc represents 0;

12. The material for organic electroluminescence device according to claim 1, wherein sa+sb+sc+ta+tb+tc represents 1.

13. The material for organic electroluminescence device according to claim 1, wherein q represents 1 or 2.

14. The material for organic electroluminescence device according to claim 1, wherein q represents 1.

15. An organic electroluminescence device comprising an organic thin film layer comprising one or more layers between a cathode and an anode,

wherein

the organic thin film layer comprises a light emitting layer, and

at least one layer of the organic thin film layer comprises the material for organic electroluminescence device according to claim 1.

16. The organic electroluminescence device according to claim 15, wherein the light emitting layer comprises the material for organic electroluminescence device.

17. The organic electroluminescence device according to claim 15, wherein the light emitting layer comprises a phosphorescent emitting material selected from ortho metallated complexes of a metal selected from iridium (Ir), osmium (Os), and platinum (Pt).

18. The organic electroluminescence device according to claim 15, wherein the light emitting layer comprises a first host material selected from the material for organic electroluminescence device and a second host material represented by formula (1);

19. The organic electroluminescence device according to claim 18, wherein the second host material is represented by formula (2):

20. The organic electroluminescence device according to claim 18, wherein the second host material is represented by formula (3):

21. The organic electroluminescence device according to claim 18, wherein the second host material is represented by formula (4):

22. The organic electroluminescence device according to claim 15, wherein the light emitting layer comprises a first host material selected from the materials for organic electroluminescence device and a second host material selected from compounds having no cyano group.