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:
Jun. 20, 2023
Filed:
Oct. 18, 2017
Grirem Advanced Materials Co., Ltd., Beijing, CN;
Ronghui Liu, Beijing, CN;
Guantong Chen, Beijing, CN;
Yuanhong Liu, Beijing, CN;
Xiaole Ma, Beijing, CN;
GRIREM ADVANCED MATERIALS CO., LTD., Beijing, CN;
Abstract
The present invention relates to a red phosphor, a preparation method thereof and a light-emitting device prepared therefrom. A particle of the red phosphor consists of a phosphor inner core having a chemical formula of AGeF:yMnand an outer shell having a chemical formula of BMF:yMn, wherein 1.596≤x≤2.2, 1.6≤x≤2.2, 0.001≤y≤0.2, 0≤y≤0.2, 0.9≤z≤1.1, and 0.9≤z≤1.1; A and B are independently selected from alkali metal elements; and M is Si, or Si and Ge. The red phosphor provided by the present invention has high luminous efficiency and stability. Moreover, the phosphor alone or in combination with other luminescent materials can be used for preparing a light-emitting device with high performance.