真空紫外激发下Pr <SUP>3+</SUP>掺杂的几种硼酸盐体系的低温光谱特性

无机材料学报, 2007, 22(2): 373-376. doi: 10.3724/SP.J.1077.2007.00373

真空紫外激发下Pr ³⁺掺杂的几种硼酸盐体系的低温光谱特性

符义兵 , 张国斌 , 吴文清 , 戚泽明 , 石军岩 , 施朝淑

1.1. 中国科学技术大学国家同步辐射实验室, 合肥 230029

2. 2. 中国科学技术大学物理系, 合肥 230026

1.1. National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China

2. 2. Department of physics, University of Science and Technology of China, Hefei 230026, China

关键词：三价镨离子 , photon cascade emission , VUV excitation , low temperature spectra

Low Temperature Spectral Properties of Several Pr³⁺ Doped Borates under VUV Excitation

FU Yi-Bing , ZHANG Guo-Bin , WU Wen-Qing , QI Ze-Ming , SHI Jun-Yan , SHI Chao-Shu

Keywords： Pr3+ ion , 光子级联发射 , 真空紫外激发 , 低温光谱

研究了SrB₄:Pr ³⁺, LaB₃O₆:Pr³⁺ 及LaMgB₅O₁₀:Pr ³⁺低温下的光谱. 从发射谱上看这三种发光材料都可以产生光子级联发射, 对照Pr³⁺离子的能级图对各发射峰进行了指认. 因为硼酸盐体系中较高的声子振动能量导致了³P₀和¹D₂能级间的无辐射弛豫, 所以级联发射的第二步过程³p ₀→³H_J发光非常微弱或基本没有. 在LaB₃O₆ 及LaMgB₆O₁₀的激发谱上除了4f5d吸收带外还观测到了Pr³⁺离子的³H₄→¹S₀跃迁, 由此在这两种材料中确定了Pr ³⁺离子的¹S₀能级相对于最低的4f5d能级的位置.

Low temperature spectra of SrB₄O₇:Pr³⁺, LaB₃O₆:Pr³⁺ and LaMgB₅O₁₀:Pr³⁺
were investigated by synchrotron radiation VUV light. Under VUV excitation,
photon cascade emission was found in SrB₄O₇:Pr³⁺, LaB₃O₆:Pr³⁺ and LaMgB₅O₁₀:Pr³⁺. All peaks in emission spectra were assigned. Because high phonon energy in borates results in non-radiative relaxation between ³P₀ and ¹D₂states of Pr³⁺, the second step emission ³P₀→3H_Jis very low in SrB₄O₇:Pr³⁺ and even is absent in LaB₃O₆:Pr³⁺ and LaMgB₅O₁₀:Pr³⁺. In the excitation spectra of LaB₃O₆:Pr³⁺ and LaMgB₅O₁₀:Pr³⁺, along with the 4f5d absorption bands, a weak line due to ³H₄→ ¹S₀ transition also was detected. From the position of ³H₄→ ¹S₀transition, the energy difference of ¹S₀state and the lowest 4 f5d state was determined.

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真空紫外激发下Pr 3+掺杂的几种硼酸盐体系的低温光谱特性

Low Temperature Spectral Properties of Several Pr3+ Doped Borates under VUV Excitation

参考文献

真空紫外激发下Pr ³⁺掺杂的几种硼酸盐体系的低温光谱特性

Low Temperature Spectral Properties of Several Pr³⁺ Doped Borates under VUV Excitation