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:
Sep. 13, 2016
Filed:
Feb. 24, 2012
Norimasa Yokoyama, Tokyo, JP;
Shuichi Hayashi, Tokyo, JP;
Eiji Takahashi, Ibaraki, JP;
Shigeru Kusano, Ibaraki, JP;
Norimasa Yokoyama, Tokyo, JP;
Shuichi Hayashi, Tokyo, JP;
Eiji Takahashi, Ibaraki, JP;
Shigeru Kusano, Ibaraki, JP;
HODOGAYA CHEMICAL CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescent device comprising, between an anode and a cathode, a hole-transporting layer, a luminous layer and an electron-transporting layer, wherein the hole-transporting layer contains an arylamine compound (X) having a molecular structure to which three or more triphenylamine skeletons are singly bonded or bonded through a divalent hydrocarbon group and an arylamine compound (Y) having a molecular structure to which two triphenylamine skeletons are singly bonded or bonded through the divalent hydrocarbon group. The device excels in hole and electron injection/transport property, stability and durability in the form of thin films, and is highly efficient, becomes luminous on a low driving voltage, and has a long life.