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:
Jul. 21, 2026
Filed:
Apr. 18, 2022
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Nobuharu Ohsawa, Zama, JP;
Toshiki Sasaki, Isehara, JP;
Abstract
A novel light-emitting device with high emission efficiency is provided. The light-emitting device includes a first electrode, a second electrode, an EL layer, and an insulating layer. The EL layer is positioned between the first electrode and the second electrode. The EL layer includes at least a light-emitting layer, an electron-transport layer, and an electron-injection layer. The electron-transport layer is positioned over the light-emitting layer. The insulating layer is in contact with an end portion of the light-emitting layer and an end portion of the electron-transport layer. The electron-injection layer is positioned over the electron-transport layer. The electron-injection layer includes an alkali metal compound and a reducing agent.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile