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:
Apr. 17, 2018
Filed:
Aug. 24, 2015
Idemitsu Kosan Co., Ltd., Chiyoda-ku, JP;
Yuichiro Kawamura, Sodegaura, JP;
Toshinari Ogiwara, Sodegaura, JP;
Ryohei Hashimoto, Sodegaura, JP;
IDEMITSU KOSAN CO., LTD., Chiyoda-ku, JP;
Abstract
An organic electroluminescence device includes an anode, an emitting layer and a cathode, in which the emitting layer includes a first compound, a second compound and a third compound. The first compound is a delayed fluorescent compound. The first compound has an energy gap Tat 77 [K] larger than an energy gap Tat 77 [K] of the second compound. The third compound has an energy gap Tat 77 [K] larger than the energy gap Tat 77 [K] of the second compound. The second compound has a fused ring structure represented by a formula (2) below and has eight or less rings in total.