Abstract Erbium doped garnet-type Li5La3Nb2O12 electrolytes were synthesized by conventional solid state reaction in air at 900 °C. Formation, microstructure and luminescence properties were analyzed using X-ray diffraction (XRD), scanning electron microscopy (SEM), UV–VIS absorption and luminescence techniques. The limits of the Li5La3-xErxNb2O12 solid solution (0 ≤ x ≤ 0.05) were established by XRD and SEM. For x > 0.05, garnet structure coexists with segregated Er2O3. Rietveld refinement of room temperature powder XRD patterns shows that this solid solution exhibits a cubic garnet structure (a ~ 12.79 A and S.G. Ia-3d) and trivalent Er ions replace La cations in cubic coordination (located in 24c site). The typical green, red and infrared luminescence of Er3+ ions can be efficiently excited under several wavelength lights in the UV–VIS–NIR region. Optical measurements have been improved dispersing Li5La3-xEr-xNb2O12 powder in KBr pellets. Our results indicate the potentiality of rare earth doped Li5La3Nb2O12 garnets as a new family of phosphors.

中文翻译：

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Er +3 掺杂石榴石型 Li 5 La 3 Nb 2 O 12 电解质作为潜在新型荧光粉的结构、形貌和发光研究

摘要 掺铒石榴石型 Li5La3Nb2O12 电解质是在 900 °C 空气中通过常规固态反应合成的。使用 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、UV-VIS 吸收和发光技术分析形成、微观结构和发光特性。Li5La3-xErxNb2O12 固溶体的极限 (0 ≤ x ≤ 0.05) 由 XRD 和 SEM 确定。对于 x > 0.05，石榴石结构与偏析的 Er2O3 共存。室温粉末 XRD 图案的 Rietveld 细化表明，该固溶体呈现立方石榴石结构（a ~ 12.79 A 和 SG Ia-3d），三价 Er 离子以立方配位（位于 24c 位点）取代 La 阳离子。典型的绿色，Er3+ 离子的红色和红外发光可以在 UV-VIS-NIR 区域的几种波长光下有效激发。将 Li5La3-xEr-xNb2O12 粉末分散在 KBr 颗粒中的光学测量得到了改进。我们的结果表明，稀土掺杂的 Li5La3Nb2O12 石榴石作为一种新型荧光粉的潜力。