发光
激发
激发态
分析化学(期刊)
微晶
粉末衍射
同步辐射
材料科学
光谱学
化学
原子物理学
结晶学
光电子学
光学
物理
量子力学
色谱法
作者
M. Trevisani,Konstantin V. Ivanovskikh,Fabio Piccinelli,A. Speghini,Marco Bettinelli
标识
DOI:10.1088/0953-8984/24/38/385502
摘要
Ca(9)Lu(PO(4))(7):Ce (3+) and Ca (9)Lu (PO (4))(7):Pr (3+) polycrystalline materials were synthesized by solid state reaction at high temperature. The materials were characterized by powder x-ray diffraction (XRPD). The luminescence spectroscopy and the excited state dynamics of these compounds were investigated upon excitation with UV/VUV synchrotron radiation. Both materials showed efficient and fast 5d-4f emission upon direct VUV excitation into the 5d levels but only Ca(9)Lu(PO(4))(7):Ce (3+) revealed luminescence upon excitation across the bandgap. The decay kinetics of the 5d-4f emission upon VUV intra-center excitation is characterized by a decay time of 29 ns for Ce (3+) and 17 ns for Pr (3+) with no significant build-up after the excitation pulse. For the both compounds, no significant temperature dependence of the 5d-4f emission lifetime was observed within the range 8-300 K.
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