Luminescent properties of Tb³⁺ activated double molybdates and tungstates

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• 作者：Zhengliang Wang ; Hongbin Liang ; Qin Wang ; Lijun Luo ; Menglian Gong
• 关键词：Molybdenum ; Tungsten ; Light-emitting diodes ; Optical properties
• 刊名：Materials Science and Engineering: B
• 出版年：2009
• 出版时间：25 August 2009
• 年：2009
• 卷：164
• 期：2
• 页码：120-123
• 全文大小：553 K

文摘

The phosphors, NaLa_1−xTb_x(MoO₄)₂ and NaLa_1−xTb_x(WO₄)₂, were prepared by the solid-state reaction. The structures and photoluminescent properties of the phosphors were studied. The result of XRD patterns indicates that these phosphors are of the similar scheelite-like (CaWO₄) isostructure. The absence of concentration quenching of Tb³⁺ was observed in NaLa_1−xTb_x(WO₄)₂ by investigating their photoluminescent properties. This phenomenon has not been reported before, as we known. The phosphor NaTb(WO₄)₂ shows stronger green emission under 378 nm excitation with broader excitation band, compared with NaLa_1−xTb_x(MoO₄)₂.