Abstract A series of Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 phosphors were successfully prepared via a conventional solid-state reaction method. The influences of the doping concentration of Eu3+ on the microstructures and luminescence properties for the as-prepared Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 phosphors were investigated systematically. Our results indicate that the doping of Eu3+ hardly affect the microstructures while markedly impact luminescence properties for the Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 phosphors. Due to an effective energy transfer from Tb3+ to Eu3+ in the Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 phosphors, the multicolor emissions have been realized via varying the doping concentration of Eu3+ from 0 to 0.5, which can be adjusted from green→yellow-green→yellow→orange→red and yellow-green→ yellow→orange→red upon excitation of two visible light wavelengths (486 and 464 nm), respectively. Moreover, the doping of Eu3+ also can significantly boost the thermal stability of Li0.1Na0.9Gd0.5Tb0.5(MoO4)2 phosphor, and the obtained Li0.1Na0.9Gd0.5Tb0.42Eu0.08(MoO4)2 phosphor possesses superior thermal stability, can be expected as a candidate phosphor for white light diodes.

中文翻译：

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Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2新型荧光粉中Eu3+诱导的多色发光特性和增强的热稳定性

摘要 采用常规固相反应法成功制备了一系列Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2荧光粉。系统地研究了 Eu3+ 掺杂浓度对所制备的 Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 荧光粉的微观结构和发光性能的影响。我们的结果表明，Eu3+ 的掺杂几乎不影响微观结构，而显着影响 Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 荧光粉的发光性能。由于 Li0.1Na0.9Gd0.5Tb0.5-xEux(MoO4)2 荧光粉中从 Tb3+ 到 Eu3+ 的有效能量转移，通过将 Eu3+ 的掺杂浓度从 0 改变到 0.5 来实现多色发射，分别在两个可见光波长（486 和 464 nm）的激发下，可以从绿色→黄绿色→黄色→橙色→红色和黄绿色→黄色→橙色→红色进行调节。此外，Eu3+的掺杂还可以显着提高Li0.1Na0.9Gd0.5Tb0.5(MoO4)2荧光粉的热稳定性，得到的Li0.1Na0.9Gd0.5Tb0.42Eu0.08(MoO4)2荧光粉具有优越的性能。热稳定性好，有望成为白光二极管的候选荧光粉。