Organic electroluminescent device, display and illuminating device

• US 8,133,597 B2
• Filed: 08/18/2006
• Issued: 03/13/2012
• Est. Priority Date: 09/06/2005
• Status: Active Grant

• Current Assignee: UDC Ireland Limited (Universal Display Corporation)
• Original Assignee: Konica Minolta Holdings Incorporated (Konica Minolta Inc.)
• Inventors: Yasukawa, Noriko, Katoh, Eisaku, Oshiyama, Tomohiro, Otsu, Shinya
• Primary Examiner(s): YAMNITZKY, MARIE ROSE
• Application Number:
  US12/065,392
• Publication Number:
  US 20090160318A1
• Time in Patent Office: 2,034 Days
• Field of Search: None
• US Class Current: 428/690
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: C09K 2211/1007 Non-condensed systems
• 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 2211/1074 containing more than 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 50/14 Carrier transporting layers
• CPC Class Codes: H10K 50/18 Carrier blocking layers
• CPC Class Codes: H10K 85/322 comprising boron
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/346 comprising platinum
• CPC Class Codes: H10K 85/348 comprising osmium
• CPC Class Codes: H10K 85/361 Polynuclear complexes, i.e. complexes comprising two or more metal centers
• 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

Disclosed is an organic EL device having high luminous efficiency and long emission life, wherein emission wavelength is controlled. Also disclosed are an illuminating device and a display. Specifically disclosed is an organic electroluminescent device containing at least a light-emitting layer sandwiched between an anode and a cathode. This organic electroluminescent device is characterized in that the light-emitting layer contains a metal complex having a partial structure represented by the following general formula (1).

Claims

1. An organic luminescent device having at least a light emission layer placed between an anode and a cathode, wherein the light emission layer contains an emission host and an emission dopant,

wherein the emission dopant is a metal complex having a partial structure represented by Formula (2), and a mixing ratio of the emission dopant to the emission host is 0.1 to 30 weight %

2. The organic luminescent device of claim 1, wherein the metal element of Group VIII is iridium or platinum.

3. The organic luminescent device of claim 1, which comprises a positive hole blocking layer as a constitution layer placed between the light emission layer and the cathode, wherein the positive hole blocking layer contains a carboline derivative or a derivative having a ring structure in which at least one of the carbon atoms of the hydrocarbon ring constituting the carboline ring of the carboline derivative is substituted by a nitrogen atom.

4. A display having the organic luminescent device of claim 1.

5. An illumination device having the organic luminescent device of claim 1.

6. The organic luminescent device of claim 1, wherein the emission host is selected from the group consisting of a carbazole derivative, a triarylamine derivative, an aromatic borane derivative, a nitrogen-containing heterocyclic derivative, a thiophene derivative, a furan derivative and an oligoarylene compound, and a carboline derivative, or derivative having a ring structure in which at least one of carbon atoms of the hydrocarbon ring constituting the carboline ring of the carboline derivative is substituted by a nitrogen atom.