Abstract Polycrystalline, cerium-doped yttrium oxyorthosilicate (Y2SiO5:Ce, YSO:Ce) and lutetium yttrium oxyorthosilicate (Lu2-xYxSiO5:Ce, LYSO:Ce) scintillator materials have been synthesized and characterized. Samples have been prepared at 1400 °C with the aid of LiF flux. The initial concentration of the flux and the cerium content has strongly affected the particle size and photoluminescence (PL) intensity of the host crystal. Scanning electron microscopy (SEM) and dynamic light scattering (DLS) measurements have proven that the sizes of particles are in the range of 200−500 nm for powdered samples prepared with ≈18 mol% LiF concentration. The highest PL yield for the X2-YSO phase has been observed for host crystals with 1 mol% Ce3+. Increasing the Ce content in YSO and LYSO, as well as the Y content in LYSO samples resulted in a redshift in their PL emission spectra.

中文翻译：

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LiF添加剂和铈掺杂对多晶YSO和LYSO光致发光性能的影响

摘要 合成并表征了多晶掺铈的氧化正硅酸钇 (Y2SiO5:Ce, YSO:Ce) 和氧化正硅酸钇镥 (Lu2-xYxSiO5:Ce, LYSO:Ce) 闪烁体材料。样品已在 LiF 助焊剂的帮助下在 1400 °C 下制备。助熔剂的初始浓度和铈含量强烈影响了主体晶体的粒径和光致发光 (PL) 强度。扫描电子显微镜 (SEM) 和动态光散射 (DLS) 测量已经证明，对于用 ≈18 mol% LiF 浓度制备的粉末样品，颗粒尺寸在 200-500 nm 范围内。对于含有 1 mol% Ce3+ 的主体晶体，已观察到 X2-YSO 相的最高 PL 产率。增加 YSO 和 LYSO 中的 Ce 含量，