| CaAl3BO7：RE(RE=Ce,Gd,Tb)中稀土离子的光谱特性 |
| |
| 引用本文： | 尤洪鹏,洪广言.CaAl3BO7：RE(RE=Ce,Gd,Tb)中稀土离子的光谱特性[J].发光学报,1997,18(3):191-194. |
| |
| 作者姓名： | 尤洪鹏 洪广言 |
| |
| 作者单位： | 中国科学院长春应用化学研究所, 长春 130022 |
| |
| 摘 要： | 采用固相反应法合成了CaAl3BO7RE(RE=Ce,Gd,Tb),研究了Ce3+,Gd3+和Tb3+的光谱特性。发现铈离子周围存在较强的晶场,使基态的4f能级劈裂较大,从而导致铈离子的特征发射峰重叠较大;Ce3+的5d能级明显低于Gd3+的6I、6P能级;Ce3+和Tb3+之间存在有效的能量传递。
|
| 关 键 词： | CaAl3BO7：RE 稀土离子的光谱 能量传递 |
| 收稿时间： | 1996-12-18 |
LUMINESCENT CHARACTERISTICS OF SEVERAL RARE EARTHS IN CaAl3BO7：RE(RE=Ce,Gd, Tb) |
| |
| You Hongpeng,Hong Guangyan.LUMINESCENT CHARACTERISTICS OF SEVERAL RARE EARTHS IN CaAl3BO7：RE(RE=Ce,Gd, Tb)[J].Chinese Journal of Luminescence,1997,18(3):191-194. |
| |
| Authors: | You Hongpeng Hong Guangyan |
| |
| Institution: | Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130021 |
| |
| Abstract: | By high temperature solid state reaction, CaAl3BO7:RE was synthesized at 1140℃. The luminescent properties of Ce3+, Gd3+, Tb3+ and sensitization of Ce3+ to Tb3+ have been studied. The excitation band peaking at about 340nm and the broad emission band maximizing around 400 nm of the Ce3+ are due to 4f-5f allowed transition. The emission feature of the Ce3+ indicates that there is the stronger crystal field at the surroundings of the Ce3+ ion, leading to the extensive crystal field splitting of 4f ground state. The absence of energy transfer of Ce3+-Gd3+-Tb3+ is due to the fact that 5d state of Ce3+ is lower than 6I and 6P states of the Gd3+. Energy transfer from Ce3+ to Tb3+ in the CaAl3BO7 is efficient. |
| |
| Keywords: | CaAl3BO7：RE luminescence of rare earth ion energy transfer |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《发光学报》浏览原始摘要信息 |
| 点击此处可从《发光学报》下载免费的PDF全文 |
|
