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. 18, 2018
Filed:
Oct. 23, 2013
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Kazuki Nishimura, Sodegaura, JP;
Toshihiro Iwakuma, Sodegaura, JP;
Kenichi Fukuoka, Sodegaura, JP;
Chishio Hosokawa, Sodegaura, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescence device () includes: an anode (); a cathode (); and an organic thin-film layer () interposed between the anode () and the cathode (). The organic thin-film layer () includes a phosphorescent-emitting layer () containing a host and a phosphorescent dopant. The host contains a first host and a second host. The first host includes a substituted or unsubstituted polycyclic fused aromatic skeleton, the skeleton having 10 to 30 ring-forming atoms not including an atom of a substituent. The second host has an affinity level greater than the affinity level of the first host.