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:
Oct. 29, 2024
Filed:
Aug. 20, 2019
Applicant:
Sharp Kabushiki Kaisha, Sakai, JP;
Inventor:
Shinichi Handa, Sakai, JP;
Assignee:
SHARP KABUSHIKI KAISHA, Sakai, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H10K 50/115 (2023.01); H10K 50/15 (2023.01); H10K 102/00 (2023.01);
U.S. Cl.
CPC ...
H10K 50/115 (2023.02); H10K 50/156 (2023.02); H10K 2102/00 (2023.02);
Abstract
A light-emitting element has the following: a cathode; an anode; a light-emitting layer disposed between the cathode and the anode, and containing quantum dots; and a hole transport layer disposed between the anode and light-emitting layer. The hole transport layer has a first region adjacent to the anode. The hole transport layer also has a second region closer to the light-emitting layer than the first region is. The second region adjoins to the light-emitting layer. The first region has an ionization potential larger than an ionization potential of the second region and larger than an ionization potential of the light-emitting layer.