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. 21, 2013
Filed:
Jun. 01, 2010
Kenji Okumoto, Kyoto, JP;
Jeremy Burroughes, Cambridge, GB;
Julian Carter, Cambridgeshire, GB;
Panasonic Corporation, Osaka, JP;
Cambridge Display Technology Ltd., Cambridgeshire, GB;
Abstract
An organic electroluminescence element having a cathode as a top electrode, and excelling in luminance efficiency, drive voltage, and operational life is provided. The organic electroluminescence element includes an anode over a substrate and a luminescent layer over the anode. The luminescent layer comprises an organic material. An electron injection layer is over the luminescent layer for injecting electrons into the luminescent layer. The electron injection layer is a metal including at least one of an alkaline metal and an alkaline earth metal. A fullerene layer is over the electron injection layer and includes fullerenes and at least one of an alkaline metal and an alkaline earth metal. The at least one of the alkaline metal and the alkaline earth metal included in the fullerene layer has a lower work function than a lowest unoccupied molecular orbit energy level of the fullerenes. A cathode is over the fullerene layer.