Pr^(3+)掺杂的LaF_3纳米微晶/氟氧化物玻璃陶瓷的VUV光谱  

Vacuum Ultraviolet Spectroscopic Properties of Pr^(3+) Doped LaF_3 Nanocrystals/glass

作　　者：孟春霞[1] 黄世华[1] 由芳田[1] 常建军[1] 彭洪尚[1] 陶冶[2] 张国斌[3] 

机构地区：[1]北京交通大学光电子技术研究所信息存储,显示与材料重点实验室,北京100044 [2]中国科学院高能物理研究所同步辐射实验室,北京100039 [3]中国科学技术大学国家同步辐射实验室,合肥230026

出　　处：《无机化学学报》2005年第4期464-467,共4页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.10204001 和 No.10374002);北京交通大学校基金资助项目(No.2002RC032)。

摘　　要：The vacuum ultraviolet (VUV) spectroscopic properties of praseodymium (Pr3+, 1at%) doped LaF3 nanocrystals/glass at room temperature and 20 K are reported. Two types of Pr3+ ions, those in LaF3 nanocrystals and those in the glass host, were excited to 4f 5d band by VUV using synchrotron radiation as an excitation source, and emissions of 1S0 → 1D2 (336 nm), 1S0 → 1I6 (397 nm ) of Pr3+ in the nanocrystals and emissions of 4f 5d → 3HJ, 3FJ of Pr3+ in the glass appeared at the same time. But unlike in the bulk sample crystals, emission of 3P0 → 3HJ, 3FJ as the second step of the quantum splitting (QS) of Pr3+ in the LaF3 nanocrystals was not observed at room temperature, which could be explained that Pr3+ ions in the glass absorbed the energy of 3P0 → 3H4 of Pr3+ in the nanocrystals. Two types of excitation spectra monitoring different emissions were also measured, so it could be observed that the lowest energy of 4f 5d band of Pr3+ in the nanocrystals was about 53 500 cm-1 (186 nm) and in the glass about 33 800 cm-1(295 nm), respectively. These emission and excitation spectra were contrasted to those of bulk sample crystals LaF3∶Pr3+.The vacuum ultraviolet (VUV) spectroscopic properties of praseodyinium (Pr3+, lat%) doped LaF3 nanocrystals/glass at room temperature and 20 K are reported. Two types of Pr3+ ions, those in LaF3 nanocrystals and those in the glass host, were excited to 4f 5d band by VUV using synchrotron radiation as an excitation source, and emissions of S-1(0) -> D-1(2), (336 nm), S-1(0) -> (1/)(6) (397 nm) of Pr3+ in the nanocrystals and emissions of 4f5d -> H-3(J), F-3(J) of Pr3+ in the glass appeared at the same time. But unlike in the bulk sample crystals, emission of P-3(0) -> H-3(J), F-3(J) as the second step of the quantum splitting (QS) of Pr3+ in the LaF3 nanocrystals was not observed at room temperature, which could be explained that Pr3+ ions in the glass absorbed the energy of P-3(0) -> H-3(4) of Pr3+ in the nanocrystals. Two types of excitation spectra monitoring different emissions were also measured, so it could be observed that the lowest energy of 4f5d band of Pr3+ in the nanocrystals was about 53 500 cm(-1) (186 nm) and in the glass about 33 800 cm(-1) (295 nm), respectively. These emission and excitation spectra were contrasted to those of bulk sample crystals LaF3:Pr3+.

关 键 词：VUV PR^3+ 纳米微晶 氟氧化物玻璃 4f5d能级 陶瓷玻璃 发光性能 退火工艺 

分 类 号：TQ171.12[化学工程—玻璃工业]