Luminescent properties of YBa3B9O18 : Ce3+ in vacuum ultraviolet–visible region
Luminescent properties of YBa3B9O18 : Ce3+ in vacuum ultraviolet–visible region
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DOI：
10.1088/0022-3727/41/5/055410
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发表时间：
2008-03
期刊：
影响因子：
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通讯作者：
B. Han;Hong-bin Liang;Ye Tao;Q. Su
中科院分区：
文献类型：
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作者：
B. Han;Hong-bin Liang;Ye Tao;Q. Su
研究了高温固相反应法制备的Ce ~（3+）激活的YBa_3B_9 O_（18）在真空紫外-紫外波段的光谱性质。YBa_3B_9O_（18）晶体中的Y-O多面体具有规则的八面体结构，但由于Ce-O八面体的畸变，在5d处出现了5个吸收带。根据晶体结构、质心位移和光谱极化率αsp解释了Ce 3+在基质晶格中的5d能级分裂和晶场分裂等光谱特性。此外，还讨论了YBa_3B_9O_（18）：Ce ~（3+）的发光特性与温度和浓度的关系以及发光衰减。
The spectroscopic properties of Ce3+ activated YBa3B9O18, prepared by a solid-state reaction technique at high temperature, were investigated in the vacuum ultraviolet–ultraviolet range. Though Y–O polyhedra were characterized with regular octahedra in the host YBa3B9O18, five 5d absorption bands were observed due to distorted Ce–O octahedra. The spectroscopic characteristics which include split 5d levels and crystal-field splitting for Ce3+ in the host lattice were interpreted in terms of the crystal structure in combination with centroid shift and spectroscopic polarizability αsp. In addition, temperature and concentration dependence of luminescent properties as well as luminescence decay for YBa3B9O18 : Ce3+ was discussed.