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. 21, 2021
Filed:
Jul. 16, 2019
Applicant:
Qingdao University, Qingdao, CN;
Inventors:
Assignee:
QINGDAO UNIVERSITY, Qingdao, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K 11/77 (2006.01);
U.S. Cl.
CPC ...
C09K 11/7766 (2013.01);
Abstract
The present application relates to a luminescent material and a preparation method thereof. The luminescent material having a chemical formula of MNbO:xPr,yEr, where M is alkali metal element, 0.001≤x≤0.05, 0.001≤y≤0.1, and −0.05≤z≤0.05. The luminescent material is a dual-lifetime (fluorescence and long-lasting luminescence) and colorful (red, orange, yellow, yellow green and green) renewable luminescent material that respond to multiple stimulation (heat, force and light), and has a characteristic of multidimensional identifiability such as excitation mode, luminescence lifetime and luminescence color.