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:
Aug. 20, 2019
Filed:
Dec. 07, 2016
Grirem Advanced Materials Co., Ltd., Beijing, CN;
Ronghui Liu, Beijing, CN;
Guantong Chen, Beijing, CN;
Yuming Jin, Beijing, CN;
Xiaole MA, Beijing, CN;
Yuanhong Liu, Beijing, CN;
Lengleng Shao, Beijing, CN;
Grirem Advanced Materials Co., Ltd., Beijing, CN;
Abstract
The present disclosure provides a red phosphor powder, a preparation method thereof and a luminescent device comprising the red phosphor powder. The red phosphor powder comprises inorganic compounds containing an element A, an element D, an element X and manganese, wherein element A is one or more selected from a group of Li, Na and K and necessarily includes K; element D is composed of Ge and Si, or element D is composed of Si, Ge and Ti; and element X is one or more selected from a group of F, Br and Cl and necessarily includes F; and the inorganic compound has the same space group structure as KGeF, the space group structure being the hexagonal crystal system P-6mc(186). The red phosphor powder has a uniform morphology, a high luminescent efficiency and a good stability.