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:
Nov. 01, 2022
Filed:
Aug. 30, 2021
Idemitsu Kosan Co., Ltd., Tokyo, JP;
Satomi Tasaki, Sodegaura, JP;
Kazuki Nishimura, Sodegaura, JP;
Tasuku Haketa, Sodegaura, JP;
Ryoji Maeda, Sodegaura, JP;
Yuki Nakano, Sodegaura, JP;
Hiroaki Toyoshima, Sodegaura, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
An organic electroluminescence device includes: a first emitting layer disposed between an anode and a cathode; a second emitting layer disposed between the first emitting layer and the cathode; and an electron blocking layer disposed between the first emitting layer and the anode, in which the first emitting layer and the second emitting layer are in direct contact with each other; the first emitting layer and the electron blocking layer are in direct contact with each other; the first emitting layer includes a first compound represented by a formula (1) below; the first compound includes at least one group represented by a formula (11) below; the second emitting layer includes a second compound represented by a formula (2); the electron blocking layer includes a third compound; and the third compound satisfies a formula (M1) below.