Fabrication, Structural and Luminescent Properties of Ca2Y8(SiO4)6O2:Eu3+ Phosphors

被引：0

作者：

Li Z. ^{[1
]}

Chen X. ^{[1
]}

Hu F. ^{[1
]}

Wei R. ^{[1
]}

Guo H. ^{[1
]}

机构：

[1] Department of Physics, Zhejiang Normal University, Jinhua

来源：

Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2019年 / 37卷 / 05期

关键词：

Ca[!sub]2[!/sub]Y[!sub]8[!/sub](SiO[!sub]4[!/sub])[!sub]6[!/sub]O[!sub]2[!/sub]:Eu[!sup]3+[!/sup; Phosphors; Thermal stability; White LED;

D O I：

10.11785/S1000-4343.20190502

中图分类号：

学科分类号：

摘要：

In this work, Ca2Y8(SiO4)6O2:Eu3+ red phosphors with high thermal stability were fabricated via high temperature solid state method. The structure and morphology properties of samples were characterized by X-ray diffraction and scanning electron microscopy. Results showed that Ca2Y8(SiO4)6O2:Eu3+ phosphors were successfully fabricated. Under the excitation of 394 nm, these samples exhibited strong red emission that ascribed to 5D0→7FJ (J=1, 2, 3, 4) transitions of Eu3+. Thermal stability of Ca2Y8(SiO4)6O2:0.3Eu3+ was investigated through temperature dependent spectra. With the increase of temperature, the emission intensity of Ca2Y8(SiO4)6O2:0.3Eu3+ strengthened at first and then decreased. The emission intensity reached the highest at 483 K and was enhanced 1.45 times compared with that at room temperature. A white LED device was developed by coating the mixture of Ca2Y8(SiO4)6O2:0.3Eu3+, blue BaMgAl10O17:Eu2+ and green BaSiO4:Eu2+ phosphors onto near ultraviolet chip (395 nm). The warm white emitting was achieved under different operating current (20~140 mA). And the color rendering index and correlated color temperature of the packaged white LED device found to be higher than 92 and lower than 4000 K, respectively. These results suggested that the Ca2Y8(SiO4)6O2:Eu3+ phosphors may have potential application in the field of white LED. © 2019, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.

引用

页码：530 / 536

页数：6

共 33 条

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