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. 10, 2024
Filed:
Feb. 01, 2022
Toyoda Gosei Co., Ltd., Kiyosu, JP;
Kengo Nagata, Kiyosu, JP;
TOYODA GOSEI CO., LTD., Kiyosu, JP;
Abstract
A light-emitting element includes a first n-type contact layer, a light-emitting layer that is located on the first n-type contact layer and emits light at a wavelength of not less than 210 nm and not more than 365 nm, a p-type layer that includes AlGaInN (0≤x+y≤1, 0≤x, y≤1) and is located above the light-emitting layer, a second n-type contact layer that includes AlGaInN (0≤x+y≤1, 0≤x, y≤1), is located on the p-type layer and forms a tunnel junction with the p-type layer, an n-electrode connected to the first n-type contact layer, and a p-electrode connected to the second n-type contact layer. Band gaps of the p-type layer and the second n-type contact layer are larger than a band gap of the light-emitting layer.