Organic electroluminescence device

• US 8,349,472 B2
• Filed: 05/31/2005
• Issued: 01/08/2013
• Est. Priority Date: 12/15/1999
• Status: Expired due to Term

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Morioka, Yukiko, Oda, Atsushi, Ishikawa, Hitoshi, Toguchi, Satoru, Tada, Hiroshi
• Primary Examiner(s): Garrett, Dawn L.
• Application Number:
  US11/139,492
• Publication Number:
  US 20050221125A1
• Time in Patent Office: 2,779 Days
• Field of Search: 428/690, 428/917, 313/504, 313/506
• US Class Current: 428/690
• CPC Class Codes: H10K 50/11 characterised by the electroluminescent [EL] layers
• CPC Class Codes: H10K 85/30 Coordination compounds
• CPC Class Codes: H10K 85/321 Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/60 Organic compounds having low molecular weight H10K85/10 - H10K85/50 take precedence
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/623 containing five rings, e.g. pentacene
• CPC Class Codes: H10K 85/624 containing six or more rings
• CPC Class Codes: H10K 85/626 containing more than one polycyclic condensed aromatic rings, e.g. bis-anthracene
• CPC Class Codes: H10K 85/633 comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
• CPC Class Codes: H10K 85/656 comprising two or more different heteroatoms per ring H10K85/652 takes precedence
• CPC Class Codes: H10K 85/6565 Oxadiazole compounds
• CPC Class Codes: H10K 85/657 Polycyclic condensed heteroaromatic hydrocarbons
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

An organic EL device including at least an anode, a cathode and an organic light-emitting zone with high brightness is provided. A mixture containing at least two compounds is used for a light-emitting zone and the spectrum of the luminescence from light-emitting zone includes at least one peak at a wavelength which is different from neither of fluorescent peak positions of the compounds included in light-emitting zone.

Claims

1. An organic electroluminescent device, comprising

a light-emitting material,

wherein the light-emitting material comprises two compounds, and a spectrum of luminescence from the light-emitting material includes at least one peak that does not correspond to any peak present in a spectrum of luminescence of either individual compound,

wherein the two compounds each comprise at least one electroluminescent material represented by the following formula