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:
May. 20, 2003
Filed:
Dec. 11, 2000
Applicant:
Inventors:
Satoru Toguchi, Tokyo, JP;
Hitoshi Ishikawa, Tokyo, JP;
Hiroshi Tada, Tokyo, JP;
Yukiko Morioka, Tokyo, JP;
Atsushi Oda, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05B 3/312 ;
U.S. Cl.
CPC ...
H05B 3/312 ;
Abstract
The present invention provides an organic EL device that allows the obtaining of favorable color emission with high efficiency. The organic EL device of the present invention has at least an emission layer and an electron transporting layer between an anode and cathode and an intermediate layer is provided between the emission layer and electron transporting layer that has a film thickness of 1 to 20 nm and is comprised of a material having an ionization potential larger than that of the material used for the emission layer