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Enhancement of yellow emission and afterglow in Sr3SiO5: Eu2+, Dy3+ by adding alkaline earth metal fluorides

Published online by Cambridge University Press:  20 September 2012

Kai Dong ,
Junjie Liao ,
Siguo Xiao ,
Xiaoliang Yang  and
Jian Wen Ding
Kai Dong
Affiliation:
Department of Physics & Institute for Nanophysics and Rare-earth Luminescence, Xiangtan University, Xiangtan, Hunan 411105, People’s Republic of China
Junjie Liao
Affiliation:
Department of Physics & Institute for Nanophysics and Rare-earth Luminescence, Xiangtan University, Xiangtan, Hunan 411105, People’s Republic of China
Siguo Xiao*
Affiliation:
Department of Physics, Institute for Nanophysics and Rare-earth Luminescence, and Key Laboratory of Low Dimensional Materials & Application Technology, Xiangtan University, Xiangtan, Hunan 411105, People’s Republic of China
Xiaoliang Yang
Affiliation:
Department of Physics, Institute for Nanophysics and Rare-earth Luminescence, and Key Laboratory of Low Dimensional Materials & Application Technology, Xiangtan University, Xiangtan, Hunan 411105, People’s Republic of China
Jian Wen Ding
Affiliation:
Department of Physics, Institute for Nanophysics and Rare-earth Luminescence, and Key Laboratory of Low Dimensional Materials & Application Technology, Xiangtan University, Xiangtan, Hunan 411105, People’s Republic of China
*
a)Address all correspondence to this author. e-mail: xiaosiguo@xtu.edu.cn
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Abstract

Yellow-emitting long afterglow phosphors Sr3−xSiO5, xMF2: Eu2+, Dy3+ (0 ≤ x ≤ 0.15, M: Ba, Sr, Ca) have been prepared by high-temperature solid-state reaction method followed with rapid cooling process. Photoluminescence measurement reveals that the main emission of the phosphors locates at 575 nm, corresponding to the 4f65d1–4f7 transition of Eu2+. The introduction of alkaline earth metal fluoride effectively enhances the luminescence intensity and prolongs the afterglow time. Especially, the afterglow of the Sr2.95SiO5, 0.05BaF2: Eu2+, Dy3+ phosphor can last for 12 h. Thermal luminescence measurement shows that the trap density of Sr3SiO5: Eu2+, Dy3+ phosphor can be adjusted by adding different alkaline earth metal fluorides, which offers a feasible way to improve the afterglow properties of silicate phosphors.

Keywords

yellow afterglowSr3SiO5: Eu2+Dy3+alkaline-earth metal fluorides
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 19 , 14 October 2012 , pp. 2535 - 2539
Copyright
Copyright © Materials Research Society 2012

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