(Ce,Yb)共掺杂氧化硅薄膜的发光特性及结构 |
| |
引用本文: | 李晋桃,衡成林,张红艳,殷鹏刚.(Ce,Yb)共掺杂氧化硅薄膜的发光特性及结构[J].红外与激光工程,2014,43(2):595-599. |
| |
作者姓名: | 李晋桃 衡成林 张红艳 殷鹏刚 |
| |
作者单位: | 1.北京理工大学 物理学院,北京 100081; |
| |
基金项目: | 教育部博士点基金(20111101120021) |
| |
摘 要: | 采用磁控溅射技术在单晶硅衬底上制备了稀土(Ce,Yb)共掺杂氧化硅薄膜,研究了薄膜样品的结构和下转换发光性质。样品的发光光谱显示,在He-Cd激光器325 nm线的激发下,Ce3+离子的发光强度较弱而Yb3+离子的发光较强;Yb3+的发光随着退火温度的升高逐渐增强;这些结果加上样品的激发光谱和衰变光谱,都显示样品中发生了Ce3+ 到Yb3+的能量传递过程。X射线衍射结果表明,样品在高温退火时(大于1 000 ℃)出现晶化,形成了Ce和Yb的硅酸盐结构。笔者认为利用高温退火形成Ce的硅酸盐结构可以明显增强Yb3+的发光,从而提高薄膜的下转换发光效率。
|
关 键 词: | 下转换发光 稀土掺杂 氧化硅薄膜 硅酸盐 |
收稿时间: | 2013-06-19 |
Photoluminescence and structure of (Ce,Yb) co-doped silicon oxides |
| |
Institution: | 1.School of Physics,Beijing Institute of Technology,Beijing 100081,China;2.School of Chemistry and Environment,Beihang University,Beijing 100191,China |
| |
Abstract: | Cerium (Ce) and ytterbium (Yb) co-doped silicon oxide (SiOx: Ce, Yb) thin films were deposited by using magnetron co-sputtering technique. The down-conversion photoluminescence (PL) properties and structural evolution of the films after thermal treatments were studied. Under the excitation of a He-Cd 325 line, light emissions from the Ce3+ ions are rather weak while quite strong from the Yb3+ ions; the Yb PL intensity increases with elevating the anneal temperature, and both PL excitation and decay spectra indicate that energy transfer from Ce3+ to Yb3+ ions has taken place in the oxides. X-ray diffraction patterns show that Ce and Yb-related silicates have formed as the annealing temperature is higher than 1 000 ℃. The authors believe that the Yb PL can be enhanced greatly by forming high-luminescent Ce3+-related silicates in the oxide films, and thus increase the down-conversion efficiency. |
| |
Keywords: | |
本文献已被 CNKI 等数据库收录! |
| 点击此处可从《红外与激光工程》浏览原始摘要信息 |
| 点击此处可从《红外与激光工程》下载免费的PDF全文 |
|