Grirem Advanced Materials Co., Ltd.

Guantong Chen

Ronghui Liu

Yuanhong Liu

Xiaole Ma

Lengleng Shao

Yuming Jin

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&#x2264;x&#x2264;2.2, 1.6&#x2264;x&#x2264;2.2, 0.001&#x2264;y&#x2264;0.2, 0&#x2264;y&#x2264;0.2, 0.9&#x2264;z&#x2264;1.1, and 0.9&#x2264;z&#x2264;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.

Red phosphor, preparation method thereof and light-emitting device prepared therefrom

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

Guantong Chen