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Color tunable Sr2SiO4:Eu2+ phosphors through the modification of crystal structure

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Abstract

Eu2+ doped Sr2SiO4 phosphors were prepared through a solid-state reaction method. The phase-composition and photoluminescence of the obtained phosphors were systematically studied in terms of calcination temperature, Eu and Ba doping. High calcination temperature promoted the phase transformation from α′–Sr2SiO4 (orthorhombic) to β–Sr2SiO4 (monoclinic), while the doping of Eu or Ba ions could stabilize α′–Sr2SiO4 phase due to their long bond length with oxygen. Small amount of Eu/Ba doping prefers to occupy Sr(I) sites in the crystal lattice of Sr2SiO4, acting as nucleation sites for both α′– and β–Sr2SiO4 phases. After nucleation, Eu2+ ions distribute equally in the two sites. Through structural modification, the Sr2SiO4:Eu2+ phosphors could be controlled to emit different colors in a wide range, from blue to yellow, making them good candidates for tuning the chromaticity in application.

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Acknowledgments

This research was supported by the National Science Foundation of China (No. 51072191, 11179037), National Basic Research Program of China (2012CB922004), USTC-NSRL association funding (KY2060140005).

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Authors and Affiliations

  1. CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, Anhui, People’s Republic of China

    Li-Cheng Ju, Chao Cai, Qiang-Qiang Zhu, Jia-Ye Tang, Lu-Yuan Hao & Xin Xu

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  1. Li-Cheng Ju
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  2. Chao Cai
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  3. Qiang-Qiang Zhu
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  4. Jia-Ye Tang
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  6. Xin Xu
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Correspondence to Xin Xu.

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Ju, LC., Cai, C., Zhu, QQ. et al. Color tunable Sr2SiO4:Eu2+ phosphors through the modification of crystal structure. J Mater Sci: Mater Electron 24, 4516–4521 (2013). https://doi.org/10.1007/s10854-013-1435-4

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  • DOI: https://doi.org/10.1007/s10854-013-1435-4

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