Grirem Advanced Materials Co., Ltd.

General Research Institute for Nonferrous Metals, Beijing

Huagiang He

Hongwei Li

Xiaowei Huang

Weidong Zhuang

Yunsheng Hu

Zhen Long

Shusheng Zhang

A phosphor can be excited by UV, purple or blue light LED, its preparation method, and light emitting devices incorporating the same. The phosphor contains rare earth, silicon, alkaline-earth metal, halogen, and oxygen, as well as aluminum or gallium. Its General formula of is aLnO.MO.bM'O.fSiO.cAX:dR, wherein Ln is at least one metal element selected from a group consisting of Sc, Y, La, Pr, Nd, Gd, Ho, Yb and Sm; M is at least one metal element selected from a group consisting of Ca, Sr and Ba; M&#x2032; is at least one metal element selected from Al and Ga; A is at least one metal element selected from a group consisting of Li, Na, K, Mg, Ca, Sr and Ba; X is at least one element selected from F and Cl; R is at least one metal element selected from a group consisting of Ce, Eu, Tb and Mn; 0.01&#x2266;a&#x2266;2, 0.35&#x2266;b&#x2266;4, 0.01&#x2266;c&#x2266;1, 0.01&#x2266;d&#x2266;0.3, 0.01&#x2266;f&#x2266;3, 0.6&#x2266;e&#x2266;2.4. The phosphor has broad emitting range, high efficiency, better uniformity and stability. A light emitting device is obtained by incorporating the phosphor into a UV, purple or blue light emitting device.

Phosphor, its preparation method and light emitting devices using the same

Growing community of inventors

Beijing, China

Huagiang He