Crystal structure and luminescence properties of Lu³⁺ and Mg²⁺ incorporated silicate garnet [Ca_3?x+0.06)Lu_xCe_0.06](Sc_{2?span style='font-style: italic'>y}Mg_y)Si₃O<

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• 作者：Yongfu Liu^a ; ^b ; Xia Zhang^a ; ; Zhendong Hao^a ; Yongshi Luo^a ; XiaoJun Wang^c ; Jiahua Zhang^a ; ^{zhangjh@ciomp.ac.cn}
• 关键词：Lu3+&ndash ; Mg2+ ; Ce3+ luminescence ; Phosphor ; White LED
• 刊名：Journal of Luminescence
• 出版年：2012
• 出版时间：May, 2012
• 年：2012
• 卷：132
• 期：5
• 页码：1257-1260
• 全文大小：745 K

文摘

The yellow-emitting phosphor [Ca_3?x+0.06)Lu_xCe_0.06](Sc_2?em>yMg_y)Si₃O₁₂ obtained from Lu³⁺ and Mg²⁺ co-modified green-emitting silicate garnet Ca₃Sc₂Si₃O₁₂:Ce³⁺ (CSS:Ce³⁺) exhibits promising applications for white LEDs. In this paper, we discuss the effect of charge balance on the garnet structure formation. The changes of bond length and covalence caused by the replacement of Lu³⁺ and Mg²⁺ for Ca²⁺ and Sc³⁺ are analyzed. The shift of the Ce³⁺ emission and excitation can be attributed to the combined results from crystal field splitting effect and centroid shift of Ce³⁺ 5d levels. Thermal stability is analyzed according to configurational coordinate diagram.