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:
Jun. 19, 2007
Filed:
Dec. 27, 2004
Yuichiro Itai, Kawasaki, JP;
Masaya Nakayama, Kawasaki, JP;
Masaru Kinoshita, Kawasaki, JP;
Jun Kodama, Kawasaki, JP;
Yuichiro Itai, Kawasaki, JP;
Masaya Nakayama, Kawasaki, JP;
Masaru Kinoshita, Kawasaki, JP;
Jun Kodama, Kawasaki, JP;
Fuji Film Corporation, Tokyo, JP;
Abstract
In an organic EL device disclosed, there are stacked sequentially on a glass substrate an anode, a first carrier transportation layer, a second carrier transportation layer, a light emission layer, a third carrier transportation layer, a fourth carrier transportation layer, an electron transportation layer, and a cathode. The first carrier transportation layer is formed from a material having an ionization potential Ip lower than the ionization potential Ip of the second carrier transportation layer, and the third carrier transportation layer is formed from a material having an electron affinity Ea less than the electron affinity Ea of the fourth carrier transportation layer.