Optical Spectroscopy of Ce3+-Activated X2-Y2SiO5
Optical Spectroscopy of Ce3+-Activated X2-Y2SiO5
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DOI：
10.2109/jcersj.108.1263_1003
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发表时间：
2000-11
影响因子：
1.1
通讯作者：
H. Matsui;Chao‐Nan Xu;Yun Liu;Tadahiko Watanabe
中科院分区：
文献类型：
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作者：
H. Matsui;Chao‐Nan Xu;Yun Liu;Tadahiko Watanabe
在室温下研究了掺杂 Ce3+ 离子的 X2-Y2SiO5 的发射光谱和激发光谱，其中使用不同的起始材料 CeO2 (IV) 或 Ce(NO3)3⋅6H2O (III) 添加 Ce3+ 离子。基于高斯函数分析发射光谱，以研究 Ce3+ 的详细光学特性。掺杂CeO2的Y2SiO5表现出宽光谱，尾部在500至600nm范围内。另一方面，掺杂Ce(NO3)3 的Y2SiO5 给出了短于500nm 的相对尖锐的光谱。通过使用基于高斯函数的拟合参数，发现与 Ce(NO3)3 掺杂的 Y2SiO5 掺杂相比，CeO2 掺杂的 Y2SiO5 在 430 nm 附近显示出额外的高斯带。此外，在330nm激发下的荧光光谱表明，仅在掺杂CeO2的Y2SiO5中观察到在430nm处有峰的宽光谱。这样的发射光谱类似于根据参数拟合估计的430nm处的新高斯带。这意味着新谱带确实存在，对发射光谱的尾部有贡献。这些结果提供了有关 Ce3+ 在 X2-Y2SiO5 基体中占据位置的新信息。
Emission and excitation spectra of X2-Y2SiO5 doped with Ce3+ ions have been investigated at room temperature, in which Ce3+ ions were added by using different starting materials of CeO2 (IV) or Ce(NO3)3⋅6H2O (III). The emission spectra were analyzed on the base of a Gaussian function to investigate the detailed optical characteristics of Ce3+. Y2SiO5 doped with CeO2 exhibited a broad spectrum with a tail in the range from 500 to 600nm. On the other hand, Y2SiO5 doped with Ce(NO3)3 gave a relatively sharp spectrum shorter than 500nm. With using fitting parameters based on Gaussian function, Y2SiO5 doped with CeO2 was found to show an additional Gaussian band around 430nm in contrast to the Ce(NO3)3 doped one. Furthermore, the fluorescence spectra under the excitation at 330nm indicated that a broad spectrum with a peak at 430nm is only observed in Y2SiO5 doped with CeO2. Such an emission spectrum is similar to the new Gaussian band at 430nm estimated from the parameter fitting. This implies that the new band actually exists, contributing to the tail of the emission spectra. These results give a new information on the occupation site of Ce3+ in the X2-Y2SiO5 matrix.