Grirem Advanced Materials Co., Ltd.

Yuming Jin

Yuanhong Liu

Ronghui Liu

Xiaole Ma

Guantong Chen

Lengleng Shao

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.

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Beijing, China

Yuming Jin