The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 14, 2004
Filed:
Mar. 24, 2003
Takashi Hirano, Kanagawa, JP;
Jiro Yamada, Kanagawa, JP;
Yasuhiro Chiba, Kanagawa, JP;
Mitsuru Asano, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
An organic electroluminescence device having an anode structure on the lower surface which is effective for taking out light efficiently from the cathode on the upper surface in which the organic electroluminescence device comprises an anode, a cathode and an organic layer put between both of them. The organic layer contains an organic light emitting layer that emits light by re-combination of holes supplied from the cathode A and electrons supplied from the cathode. The cathode comprises a laminate structure of an electron injecting metal layer, and a transparent conductive layer ultra thin film which is basically light permeable. The anode contains a metal belonging to the group V or group VI of the periodical table to at least a portion in contact with the organic layer and is basically light reflective. The anode metal is selected from chromium, molybdenum, tungsten, tantalum and niobium. The anode metal has a work function of 4.8 eV or lower.