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:
Feb. 19, 2013
Filed:
Sep. 16, 2011
Toshihiro Iwakuma, Sodegaura, JP;
Masahide Matsuura, Sodegaura, JP;
Hideaki Nagashima, Sodegaura, JP;
Hidetsugu Ikeda, Sodegaura, JP;
Hiroaki Nakamura, Sodegaura, JP;
Tadashi Kusumoto, Sodegaura, JP;
Toshihiro Iwakuma, Sodegaura, JP;
Masahide Matsuura, Sodegaura, JP;
Hideaki Nagashima, Sodegaura, JP;
Hidetsugu Ikeda, Sodegaura, JP;
Hiroaki Nakamura, Sodegaura, JP;
Tadashi Kusumoto, Sodegaura, JP;
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Abstract
An organic electroluminescent device () including an anode (), a cathode (), and at least a first layer (), a second layer (), and a third layer () provided between the anode () and the cathode () in that order from the anode side. At least one of the first to third layers (), (), and () includes a phosphorescent compound. At least one of the first to third layers (), (), and () is an emitting layer. At least three compounds respectively forming the first layer (), the second layer (), and the third layer () other than the phosphorescent compound are compounds of the following formula (). wherein Rto Reach represent a hydrogen atom or a substituent, provided that adjacent substituents may form a ring.