MATERIAL FOR ORGANIC ELECTROLUMINESCENCE DEVICE, AND ORGANIC ELECTROLUMINESCENCE DEVICE

• US 20120181528A1
• Filed: 09/24/2010
• Published: 07/19/2012
• Est. Priority Date: 09/30/2009
• Status: Active Grant

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Takada, Saki, Murakami, Takeshi, Otsuka, Tetsuro
• Granted Patent: US 8,426,042 B2
• Time in Patent Office: Days
• US Class Current: 257/40
• CPC Class Codes: C07F 15/0033 Iridium compounds
• CPC Class Codes: C07F 15/0086 Platinum compounds
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• 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 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• 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 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/346 comprising platinum
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/6572 comprising only nitrogen in the heteroaromatic polycondensed ring system, e.g. phenanthroline or carbazole

Abstract

A material for an organic electroluminescence device containing at least phosphorescent metal complex A and phosphorescent metal complex B, metal complex A and metal complex B are both organic metal complexes containing a metal having an atomic weight of 40 or more and a ligand, metal complex A has a specific structure, and metal complex B has the same structure with metal complex A except that one or more atoms directly bonding to ligand structures are substituted with atoms belonging to the same group of the atoms and having a greater atomic weight, and ratio of the content of metal complex B to the content of metal complex A is 0.005% by mass or more and 2% by mass or less.

Claims

1. A material for an organic electroluminescence device comprising at least a phosphorescent metal complex A and a phosphorescent metal complex B, wherein the phosphorescent metal complex A comprises a partial structure represented by the following formula (1), and the phosphorescent metal complex B has the same structure with the phosphorescent metal complex A except that, in at least one substituent of R¹ and R² in the formula (1), one or more atoms directly bonding to Q¹ or Q² are substituted with an atom belonging to the same group as in the one or more atoms and having a greater atomic weight than the one or more atoms, and a ratio of the content of the phosphorescent metal complex B to a content of the phosphorescent metal complex A is 0.005% by mass or more and 2% by mass or less:

2. The material for an organic electroluminescence device as claimed in claim 1, wherein the metal complex A has at least one fluorine atom as at least one of R¹ and R² in formula (1), and the at least one fluorine atom of the metal complex A is replaced with at least one halogen atom other than the fluorine atom in the metal complex B.

3. The material for an organic electroluminescence device as claimed in claim 2, wherein the halogen atom other than the fluorine atom in the metal complex B is a chlorine atom.

4. The material for an organic electroluminescence device as claimed in claim 1, wherein both of R¹ and R² are fluorine atoms.

5. The material for an organic electroluminescence device as claimed in claim 1, wherein the metal complex A comprises a partial structure represented by the following formula (2):

6. The material for an organic electroluminescence device as claimed in claim 1, wherein the metal complex A comprising a partial structure represented by the following formula (3):

7. The material for an organic electroluminescence device as claimed in claim 1, wherein E³ represents a carbon atom.

8. The material for an organic electroluminescence device as claimed in claim 1, wherein M represents Pt.

9. The material for an organic electroluminescence device as claimed in claim 1, wherein the formula (1) is represented by the following formula (C-2):

10. The material for an organic electroluminescence device as claimed in claim 1, wherein M represents Ir.

11. The material for an organic electroluminescence device as claimed in claim 1, wherein the formula (1) is represented by the following formula (A10):

12. The material for an organic electroluminescence device as claimed in claim 1, wherein the formula (1) is represented by the following formula (P-1):

13. An organic electroluminescence device comprising a substrate having thereon a pair of electrodes and at least one organic layer comprising a light-emitting layer comprising a light-emitting material between the pair of electrodes, wherein at least any layer of the organic layers comprising the material for an organic electroluminescence device as claimed in claim 1.

14. An organic electroluminescence device comprising a substrate having thereon a pair of electrodes and at least one organic layer comprising a light-emitting layer comprising a light-emitting material between the pair of electrodes, wherein at least any layer of the organic layers comprising the material for an organic electroluminescence device, wherein the light-emitting layer comprises the material for an organic electroluminescence device as claimed in claim 1.

17. A light emission comprising the organic electroluminescence device as claimed in claim 13.

18. A display apparatus comprising the organic electroluminescence device as claimed in claim 13.

19. An illumination apparatus comprising the organic electroluminescence device as claimed in claim 13.

15. A composition of a material for an organic electroluminescence device comprising at least a phosphorescent metal complex A and a phosphorescent metal complex B, wherein the phosphorescent metal complex A comprises a partial structure represented by the following formula (1), and the phosphorescent metal complex B has the same structure with phosphorescent the metal complex A except that, in at least one substituent of R¹ and R² in the formula (1), one or more atoms directly bonding to Q¹ or Q² are substituted with atoms belonging to the same group of the one or more atoms and having a greater atomic weight than the one or more atoms, and ratio of the content of the phosphorescent metal complex B to the content of phosphorescent the metal complex A is 0.005% by mass or more and 2% by mass or less:

16. A light-emitting layer which comprises a material for an organic electroluminescence device comprising at least a phosphorescent metal complex A and a phosphorescent metal complex B, wherein the phosphorescent metal complex A comprises a partial structure represented by the following formula (1), and the phosphorescent metal complex B has the same structure with the phosphorescent metal complex A except that, in at least one substituent of R¹ and R² in the formula (1), one or more atoms directly bonding to Q¹ or Q² are substituted with atoms belonging to the same group of the one or more atoms and having a greater atomic weight than one or more atoms, and ratio of the content of the phosphorescent metal complex B to the content of the phosphorescent metal complex A is 0.005% by mass or more and 2% by mass or less: