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:
Aug. 11, 2026
Filed:
Nov. 28, 2023
Semiconductor Energy Laboratory Co., Ltd., Kanagawa-ken, JP;
Takeyoshi Watabe, Atsugi, JP;
Nobuharu Ohsawa, Zama, JP;
Abstract
To provide a light-emitting device having high efficiency and high reliability. The light-emitting device includes a first electrode, a second electrode, and an organic compound layer; the organic compound layer is between the first electrode and the second electrode; the organic compound layer includes a first light-emitting unit, a second light-emitting unit, and an intermediate layer; the intermediate layer is between the first light-emitting unit and the second light-emitting unit; the intermediate layer includes a mixed layer containing a first organic compound and a second organic compound; the first organic compound is strongly basic; the second organic compound has an electron-transport property; and the first organic compound has a higher LUMO level than the second organic compound.