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:
Mar. 06, 2001
Filed:
Jan. 13, 1999
TDK Corporation, Tokyo, JP;
Abstract
The invention provides an organic EL device comprising a substrate, a hole injecting electrode and a negative electrode formed on the substrate, an organic layer containing an organic material between the electrodes, the organic layer including a light emitting layer having at least a light emitting function, and an electron injecting and transporting layer containing an electron transporting organic material and an inorganic insulative electron injecting and transporting layer formed of an inorganic material between the negative electrode and the light emitting layer. The inorganic insulative electron injecting and transporting layer contains at least one oxide selected from the group consisting of lithium oxide, rubidium oxide, potassium oxide, sodium oxide, cesium oxide, strontium oxide, magnesium oxide, and calcium oxide as a main component, and silicon oxide, germanium oxide or a mixture of silicon oxide and germanium oxide as a stabilizer. This construction ensures better performance than prior art devices having electron injecting and transporting layers using organic materials, a high efficiency, long life, weather resistance, and high stability.