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:
May. 21, 2019
Filed:
Dec. 10, 2013
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Masahiro Kawamura, Sodegaura-shi, JP;
Hitoshi Kuma, Sodegaura-shi, JP;
Toshinari Ogiwara, Sodegaura-shi, JP;
Satomi Tasaki, Sodegaura-shi, JP;
Yumiko Mizuki, Sodegaura-shi, JP;
Kazuki Nishimura, Sodegaura-shi, JP;
Tomoharu Hayama, Sodegaura-shi, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescence device includes: an anode; a cathode; and a single- or multi-layer organic layer interposed between the anode and the cathode. The organic layer includes at least one emitting layer containing a dopant material represented by a formula below. In the formula, Xto Xeach independently represent CRor a nitrogen atom, at least one of Xto Xis a nitrogen atom, Lrepresents a divalent aromatic hydrocarbon group or a divalent heterocyclic group, A and B each independently represents a cyclic structure, at least one of the cyclic structure A and the cyclic structure B has a substituent, and Rrepresents an aryl group, alkyl group or the like.