Organic electroluminescent device

• US 20060263635A1
• Filed: 05/03/2006
• Published: 11/23/2006
• Est. Priority Date: 05/06/2005
• Status: Active Grant

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Ise, Toshihiro
• Granted Patent: US 7,501,190 B2
• 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 2211/1044 containing two nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1059 containing three nitrogen atoms as heteroatoms
• CPC Class Codes: C09K 2211/1092 containing sulfur as the only heteroatom
• CPC Class Codes: C09K 2211/185 of the platinum group, i.e. Os, Ir, Pt, Ru, Rh or Pd
• CPC Class Codes: H10K 2101/10 Triplet emission
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• 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
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

An organic electroluminescent device having a pair of electrodes and at least one organic layer interposed between the pair of electrodes, in which the at least one organic layer contains at least one compound represented by formula (I):

• • wherein, Z¹ and Z² each independently represent a nitrogen-containing aromatic six-membered ring coordinated to the platinum through a nitrogen atom; Q¹ represents a group of atoms necessary for forming, together with the —C—C—, a nitrogen-containing aromatic five-membered ring; L¹ represents a single bond or a divalent linking group; and n is 0 or 1.

Claims

1. An organic electroluminescent device having a pair of electrodes and at least one organic layer interposed between the pair of electrodes, wherein the at least one organic layer contains at least one compound represented by formula (I):

2. The organic electroluminescent device according to claim 1, wherein the ring formed by Q¹ together with the —

C—

C—

is a substituted or unsubstituted, pyrrole, pyrazole, imidazole or triazole ring.

3. The organic electroluminescent device according to claim 1, wherein the compound represented by formula (I) is a compound represented by formula (II):

4. The organic electroluminescent device according to claim 1, wherein Z¹ and Z² each are a substituted or unsubstituted, pyridine ring, pyrazine ring or pyrimidine ring.

5. The organic electroluminescent device according to claim 1, wherein Z¹ and Z² each are an unsubstituted pyridine ring.

6. The organic electroluminescent device according to claim 1, wherein L¹ contains at least one atom selected from the group consisting of a carbon atom, a nitrogen atom, an oxygen atom, a sulfur atom and a silicon atom.

7. The organic electroluminescent device according to claim 1, wherein the compound represented by formula (I) and at least one host material are contained in a light-emitting layer of the device.

8. The organic electroluminescent device according to claim 7, wherein the content of the compound represented by formula (I) is 0.1 mass % or more and 50 mass % or less, based on the whole mass of the light-emitting layer.

9. The organic electroluminescent device according to claim 7, wherein the thickness of the light-emitting layer is 1 nm to 500 nm.