Organic electroluminescence devices using red phosphorescence compounds

• US 7,378,162 B2
• Filed: 05/13/2005
• Issued: 05/27/2008
• Est. Priority Date: 03/08/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Kyung Hoon, Lee, Jae Man, Jeong, Hyun Cheol, Park, Chun Gun, Kim, Jung Keun, Seo, Jeong Dae
• Primary Examiner(s): Saeed; Kamal A
• Assistant Examiner(s): Kosack; Joseph R
• Application Number:
  US11/128,421
• Publication Number:
  US 20060202194A1
• Time in Patent Office: 1,110 Days
• Field of Search: 313/504, 546/4, 546/2, 546/10, 257/40, 428/690, 428/917
• US Class Current: 428/690
• CPC Class Codes: C07F 15/0033 Iridium compounds
• 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 2211/1092 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: 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 85/311 Phthalocyanine
• CPC Class Codes: H10K 85/324 comprising aluminium, e.g. Alq3
• CPC Class Codes: H10K 85/342 comprising iridium
• CPC Class Codes: H10K 85/615 Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
• CPC Class Codes: H10K 85/631 Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
• CPC Class Codes: H10K 85/649 Aromatic compounds comprising a hetero atom
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

Red phosphorescene compounds and organic electro-luminescence device using the same are disclosed. In an organic electroluminescence device including an anode, a hole injecting layer, a hole transport layer, a light emitting layer, an electron transport layer, an electron injecting layer, and a cathode serially deposited on one another, the organic electroluminescence device may use a compound as a dopant of the light emitting layer.

Claims

1. An organic electroluminescent device comprising a light emitting layer, the light emitting layer comprising a red phosphorescence compound of Formula 1 below as a dopant:

2. The organic electroluminescent device of claim 1, wherein any one of Al and Zn metallic complexes and carbazole derivatives is used as a host of the light emitting layer.

3. The organic electroluminescent device of claim 1, wherein any one of Al and Zn metallic complexes and a carbazole derivative is used as a host of the light emitting layer, and wherein usage of the dopant within the range of 0.1 wt. % to 50 wt. %.

4. The organic electroluminescent device of claim 2, wherein a ligand in each of the Al and Zn metallic complexes comprises quinolyl, biphenyl, isoquinolyl, phenyl, methylquinolyl, dimethylquinolyl, dimethyl-isoquinolyl, and wherein the carbazole derivative comprises CBP.

5. The organic electroluminescent device of claim 1, wherein each of the C1 to C6 alkyl groups is selected from a group consisting of methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, and t-butyl.

6. The organic electroluminescent device of claim 1, wherein

7. The organic electroluminescent device of claim 1, wherein the Formula 1 is any one of the following chemical formulae: