[YPO4:Pr3+中发光对浓度和温度的依赖性]

[Luminescence dependence upon concentration and temperature in YPO4:Pr3+].

作者信息

Chen H, Yin M, Lian R, Lou L, Zhang W, Xia S

机构信息

Structure Research Laboratory, University of Science and Technology of China, Academia Sinica, 230026 Hefei.

出版信息

Guang Pu Xue Yu Guang Pu Fen Xi. 2001 Apr;21(2):151-4.

PMID:12947608

Abstract

Under selective excitation 3P0 state of Pr3+ ion in YPO4, the emission spectra and fluorescence decay curves are measured at different concentrations and temperatures. The origin of the spectral line located at 613.2 nm has been discussed and assigned to be the 1D2 (gamma 3)-->3H4 (gamma 5) transition. The different concentration dependence of emission intensities of levels 3P0 and 1D2 has been studied. Using static model, the fluorescence decay curve of 1D2 level is fitted, and the result shows that the cross-relaxation caused by the interaction of dipole-quadrupole between adjacent Pr3+ ions results in the concentration quenching.

摘要

在YPO₄中Pr³⁺离子的3P₀态选择性激发下，测量了不同浓度和温度下的发射光谱和荧光衰减曲线。讨论了位于613.2 nm处谱线的起源，并将其归属于1D₂(γ₃)→3H₄(γ₅)跃迁。研究了3P₀和1D₂能级发射强度的不同浓度依赖性。采用静态模型对1D₂能级的荧光衰减曲线进行拟合，结果表明相邻Pr³⁺离子之间偶极 - 四极相互作用引起的交叉弛豫导致浓度猝灭。