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:
Nov. 27, 2001
Filed:
Jun. 25, 1999
Applicant:
Inventors:
Assignee:
TDK Corporation, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 3/300 ;
U.S. Cl.
CPC ...
H05B 3/300 ;
Abstract
An organic EL device comprises a substrate, a hole injecting electrode and an electron injecting electrode formed on the substrate and at least an organic layer taking part in light emitting function and located between these electrodes. Between the electron injecting electrode and the organic layer there is an inorganic insulating electron injecting layer comprising as a main component an oxide having an electron affinity of up to 3 eV with a stabilizing component added thereto. The organic EL device possesses the merits of both an organic material and an inorganic material, and has an extended life, an improved efficiency, a low driving voltage, and so is of great practical value.