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. 24, 2017
Filed:
Apr. 17, 2012
Norimasa Yokoyama, Tokyo, JP;
Eiji Takahashi, Ibaraki, JP;
Shuichi Hayashi, Ibaraki, JP;
Daizou Kanda, Tokyo, JP;
Hiroshi Ookuma, Tokyo, JP;
Norimasa Yokoyama, Tokyo, JP;
Eiji Takahashi, Ibaraki, JP;
Shuichi Hayashi, Ibaraki, JP;
Daizou Kanda, Tokyo, JP;
Hiroshi Ookuma, Tokyo, JP;
HODOGAYA CHEMICAL CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescent device comprises, between an anode and a cathode, a hole injection layer, a hole-transporting layer, a luminous layer and an electron-transporting layer, wherein the hole injection layer contains an arylamine compound (α) having three or more triphenylamine skeletons, the hole-transporting layer contains an arylamine compound (β) having two triphenylamine skeletons, and the electron-transporting layer contains an electron-transporting compound having an anthracene ring skeleton and a pyridoindole ring skeleton. The organic EL device emits light highly efficiently, drives on a low voltage, and features excellent durability and long life.