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:
Jun. 24, 2025
Filed:
Oct. 29, 2019
Sharp Kabushiki Kaisha, Sakai, JP;
Kenji Kimoto, Sakai, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
Abstract
A light-emitting element includes a first electrode, a second electrode, a light-emitting layer, a hole injection layer provided between the first electrode and the light-emitting layer, and a hole transport layer provided between the hole injection layer and the light-emitting layer, wherein an insulator layer is provided between the hole injection layer and the hole transport layer. The hole injection layer, the insulator layer, and the hole transport layer each include a compound including one or more types of a cation and one or more types of an anion, the anion includes a group 15 or group 16 element of the periodic table, and an average oxidation number of cations in the insulator layer is greater than an average oxidation number of cations in the hole transport layer and less than an average oxidation number of cations in the hole injection layer.