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:
Oct. 16, 2001
Filed:
Feb. 01, 1999
TDK Corporation, Tokyo, JP;
Abstract
An object of the invention is to achieve an organic EL device which has an extended life, weather resistance, high stability, and high efficiency, and is inexpensive as well. This object is accomplished by the provision of an organic EL device comprising a substrate, a pair of a hole injecting electrode and a cathode formed on the substrate, and an organic layer located between these electrodes and taking part in at least a light emission function, wherein between the organic layer and the cathode there is provided an inorganic insulating electron injecting and transporting layer comprising a first component comprising at least one oxide selected from the group consisting of lithium oxide, rubidium oxide, potassium oxide, sodium oxide and cesium oxide, a second component comprising at least one oxide selected from the group consisting of strontium oxide, magnesium oxide and calcium oxide, and a third component comprising silicon oxide and/or germanium oxide.