The effect of doping La3+ on structure and luminescent properties of Sr2SiO4:Eu2+ phosphors

La3+-doped strontium silicate phosphors, Sr1.995−1.5xLaxSiO4:0.005Eu2+, have been prepared via a solid-state reaction method. The as-prepared samples have been characterized by XRD and spectrophotometer, respectively. The XRD result shows that doping La3+ results in the phase transformation (β-Sr2Si...

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Bibliographic Details
Published in:Ceramics international 2015-12, Vol.41 (10), p.13341-13347
Main Authors: Zhao, Cong, Zhu, Da-chuan, Pu, Yong, Peng, Ling-ling, Han, Tao, Tu, Ming-jing
Format: Article
Language:English
Subjects:
Doping La3
Phosphors
Solid-state reaction method
Strontium silicate
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Summary:La3+-doped strontium silicate phosphors, Sr1.995−1.5xLaxSiO4:0.005Eu2+, have been prepared via a solid-state reaction method. The as-prepared samples have been characterized by XRD and spectrophotometer, respectively. The XRD result shows that doping La3+ results in the phase transformation (β-Sr2SiO4→α׳-Sr2SiO4). The emission spectrum of the un-doped sample contains two distinct single bands, which come from Eu2+ on the two kinds of Sr2+ sites in the host of phosphor. The two single bands merge together with the increasing of La3+. Moreover, the CIE chromaticity coordinates of emission spectrum move to green region with the increasing of La3+. Doping La3+ shows a potential for improving the performance of Sr2SiO4:Eu2+ phosphors.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2015.07.119