Organic electroluminescent device

• US 20060286406A1
• Filed: 04/25/2006
• Published: 12/21/2006
• Est. Priority Date: 04/25/2005
• Status: Active Grant

• Current Assignee: UDC Ireland Limited
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Murakami, Takeshi, Igarashi, Tatsuya, Kinoshita, Ikuo
• Granted Patent: US 7,758,971 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 2211/1011 Condensed systems
• CPC Class Codes: C09K 2211/1014 bridged by heteroatoms, e.g. N, P, Si or B
• 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: 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 2211/188 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 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: Y10S 428/917 Electroluminescent

Abstract

An organic electroluminescent device comprising: a pair of electrodes comprising a positive electrode and a negative electrode; and a plurality of organic compound layers including a light emitting layer between the pair of electrodes, wherein at least one layer containing a metal complex having a tridentate or more ligand is provided between the light emitting layer and the negative electrode.

Claims

1. An organic electroluminescent device comprising:

a pair of electrodes comprising a positive electrode and a negative electrode; and

a plurality of organic compound layers including a light emitting layer between the pair of electrodes,

wherein at least one layer containing a metal complex having a tridentate or more ligand is provided between the light emitting layer and the negative electrode.

2. The organic electroluminescent device according to claim 1,

wherein the tridentate or more ligand is a quadridentate ligand.

3. The organic electroluminescent device according to claim 1,

wherein a metal ion of the metal complex is a rhodium ion, a palladium ion, a rhenium ion, an iridium ion or a platinum ion.

4. The organic electroluminescent device according to claim 1,

wherein the metal complex is a compound represented by Formula (1):

wherein M¹¹ represents a metal ion;

Q¹¹, Q¹², Q¹³ and Q¹⁴ each independently represents an atom group coordinating with M¹¹;

L¹¹, L¹², L¹³ and L¹⁴ each independently represents a single bond or a connection group;

n¹¹ represents 0 or 1, provided that when n¹¹ is 0, a bond in which L¹⁴ is interposed between Q¹³ and Q¹⁴ does not exist; and

M¹¹-Q¹¹ bond, M¹¹-Q¹² bond, M¹¹-Q¹³ bond and M¹¹-Q¹⁴ bond each may be a covalent bond, a coordinate bond or an ion bond.

5. The organic electroluminescent device according to claim 4,

wherein the compound represented by Formula (1) is a compound represented by Formula (2):

wherein M²¹ represents a metal ion;

Q²³ and Q²⁴ each independently represents an atom group coordinating with M²¹;

L²² represents a connection group;

R²¹ and R²² each independently represents a substituent group;

m²¹ and m²² each independently represents an integer of 0 to 3;

M²¹-N bond (dotted line) represents a coordinate bond; and

M²¹-Q²³ bond and M²¹-Q²⁴ bond each may be a covalent bond, a coordinate bond or an ion bond.

6. The organic electroluminescent device according to claim 1,

wherein the light emitting layer contains a light emitting material, and

wherein the light emitting material is a phosphorescent material.

7. The organic electroluminescent device according to claim 6,

wherein the light emitting material is a metal complex having a quadridentate or more ligand.