ELECTROLUMINESCENT DEVICES WITH ELECTRODE PROTECTION

• US 20090017191A1
• Filed: 08/28/2008
• Published: 01/15/2009
• Est. Priority Date: 07/29/1996
• Status: Active Grant

• Current Assignee: Cambridge Display Technology Limited (Sumitomo Chemical Company Limited)
• Original Assignee: Cambridge Display Technology Limited (Sumitomo Chemical Company Limited)
• Inventors: Pichler, Karl, Towns, Carl
• Granted Patent: US 8,039,041 B2
• Time in Patent Office: Days
• US Class Current: 427/64
• CPC Class Codes: C08G 61/00 Macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain of the macromolecule C08G2/00 - C08G16/00 take precedence
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H05B 33/10 Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• 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 50/17 Carrier injection layers
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 85/10 Organic polymers or oligomers
• CPC Class Codes: H10K 85/111 comprising aromatic, heteroaromatic, or aryl chains, e.g. polyaniline, polyphenylene or polyphenylene vinylene
• CPC Class Codes: H10K 85/113 Heteroaromatic compounds comprising sulfur or selene, e.g. polythiophene
• CPC Class Codes: H10K 85/114 Poly-phenylenevinylene; Derivatives thereof
• CPC Class Codes: Y10S 428/917 Electroluminescent

Abstract

A method of manufacturing an electroluminescent device which has an anode and a cathode and arranged between the anode and the cathode a light emissive layer, also includes an anode protection layer which protects the anode against the effects of converting a precursor polymer to a semiconductive conjugated polymer which constitutes the light emissive layer. This has been found to increase the brightness and half-life of devices.

Claims

1-25. -25. (canceled)

26. A method of manufacturing an organic electroluminescent device comprising:

depositing an anode formed of a positive charge carrier injecting material;

depositing a layer comprising an inorganic metal compound exhibiting hole transport mobility, wherein the inorganic metal compound is vanadium oxide or molybdenum oxide;

depositing a light emissive layer comprising a solution processable organic material from solution; and

depositing a cathode formed of a negative charge carrier injecting material.

27. The method of claim 26, further comprising:

depositing a further solution processable organic material layer disposed between the inorganic metal compound layer and the light emissive layer.