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:
Feb. 13, 2024
Filed:
Mar. 16, 2020
National Institute for Materials Science, Ibaraki, JP;
Naoto Hirosaki, Ibaraki, JP;
National Institute for Materials Science, Tsukuba, JP;
Abstract
Provided is a phosphor which emits near-infrared light upon irradiation of visible light or ultraviolet light. A phosphor in an embodiment of the present invention includes an inorganic substance which contains at least an Eu element, an M[3] element (M[3] is at least one selected from the group consisting of Al, Y, La and Gd.), a Si element and nitrogen element, and also contains, if necessary, at least one element selected from the group consisting of M[1] element (M[1] is Li element.), an M[2] element (M[2] is at least one element selected from the group consisting of Mg, Ca, Ba and Sr.) and an oxygen element, while the phosphor has a maximum value of an emission peak at a wavelength in the range of 760 nm or more and 850 nm and less upon irradiation by an excitation source.