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. 20, 2022
Filed:
Jun. 09, 2020
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Yuta Kawano, Kanagawa, JP;
Hiromitsu Kido, Kanagawa, JP;
Toshiki Sasaki, Kanagawa, JP;
Tomoya Yamaguchi, Kanagawa, JP;
Hideko Yoshizumi, Kanagawa, JP;
Satoshi Seo, Kanagawa, JP;
Abstract
To provide a light-emitting device not only including a light-emitting layer in which energy is efficiently transferred from a host material to a guest material but also having high reliability. In the light-emitting device, the light-emitting layer includes an organic compound having a specific naphthofuropyrazine skeleton as a host material and a light-emitting substance (e.g., an organometallic complex) whose T1 level (T) is within a certain range as a guest material, thereby increasing not only the efficiency of energy transfer from the host material to the guest material but also the reliability.