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:
Jan. 06, 2015
Filed:
Jan. 14, 2013
Panasonic Corporation, Osaka, JP;
Seiji Nishiyama, Osaka, JP;
Satoru Ohuchi, Osaka, JP;
Takahiro Komatsu, Osaka, JP;
Yoshiaki Tsukamoto, Osaka, JP;
Shinya Fujimura, Osaka, JP;
Hirofumi Fujita, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
An organic EL element includes a hole injection layer yielding excellent hole conduction efficiency, and comprises: an anode; a cathode; a functional layer disposed between the anode and the cathode, and including a light-emitting layer containing organic material; the hole injection layer disposed between the anode and the functional layer; and a bank defining an area in which the light-emitting layer is to be formed, wherein the hole injection layer includes tungsten oxide, tungsten atoms constituting the tungsten oxide include both tungsten atoms with a valence of six and tungsten atoms with a valence less than six, the hole injection layer includes a crystal of the tungsten oxide, a particle diameter of the crystal being on an order of nanometers, an inner portion of the hole injection layer is depressed to define a recess, and an upper peripheral edge of the recess is covered with a part of the bank.