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:
Dec. 19, 2023
Filed:
Aug. 18, 2021
Applicant:
Ns Materials Inc., Fukuoka, JP;
Inventors:
Yuko Ogura, Fukuoka, JP;
Yuka Takamizuma, Fukuoka, JP;
Kazunori Iida, Fukuoka, JP;
Emi Tsutsumi, Fukuoka, JP;
Masanori Tanaka, Fukuoka, JP;
Soichiro Nikata, Fukuoka, JP;
Assignee:
NS MATERIALS INC., Fukuoka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/88 (2006.01); F21V 9/30 (2018.01); C09K 11/02 (2006.01); B82Y 20/00 (2011.01); B82Y 40/00 (2011.01);
U.S. Cl.
CPC ...
C09K 11/883 (2013.01); C09K 11/025 (2013.01); F21V 9/30 (2018.02); B82Y 20/00 (2013.01); B82Y 40/00 (2013.01);
Abstract
Provided is a Cd-free blue fluorescent quantum dot with a narrow fluorescence FWHM. The quantum dot does not contain cadmium and its fluorescence FWHM is 25 nm or less. The quantum dot is preferably a nanocrystal containing zinc and selenium or zinc and selenium and sulfur. Further, the quantum dot preferably has a core-shell structure in which the nanocrystal serves as a core and the surface of the core is coated with a shell.