Tunable color emitting of CaAl2Si2O8: Eu, Tb phosphors for light emitting diodes based on energy transfer

被引：42

作者：

Yu, Xue ^{[1
]}

Xu, Xuhui ^{[1
]}

Jiang, Tingming ^{[1
]}

Yu, Hongling ^{[1
]}

Yang, Penghui ^{[1
]}

Jiao, Qing ^{[1
]}

Qiu, Jianbei ^{[1
]}

机构：

[1] Kunming Univ Sci & Technol, Key Lab Adv Mat Yunnan Prov, Coll Mat Sci & Engn, Kunming 650093, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2013年 / 139卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Optical materials; Sintering; Photoluminescence spectroscopy; Luminescence; LUMINESCENCE;

D O I：

10.1016/j.matchemphys.2013.01.042

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A series of single-phased CaAl2Si2O8: Eu, Tb phosphors have been synthesized at 1400 degrees C via a solid state reaction. The emission bands of Eu2+ and Eu3+ were observed in the air-sintered CaAl2Si2O8: Eu phosphor due to the self-reduction effect. Tb3+ ions that typically generated green emission were added in CaAl2Si2O8: Eu phosphor for contributing for a wider-range tunable emission. Energy transfer from Eu2+ to Tb3+ and the modulation of valence distribution of Eu2+/Eu3+ that contributes to the tunable color emitting were elucidated. More importantly, a white emission can be obtained by controlling the codoped contents of Li+ as well as suppressing the self-reduction degree of Eu. The white light emitting with the color coordinate (0.326, 0.261) was obtained, which indicates that CaAl2Si2O8: Eu, Tb is a promising tunable color phosphor for application in ultraviolet light emitting diodes (UV-LEDs). (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：314 / 318

页数：5

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