发光学报2001，Vol.22Issue(4)：367-672,306.
晶态四硼酸锶中二价镝的发射
Emission from Divalent Dysprosium (Dy2+ )in Crystalline Strontium Tetraborate
许武 1Peterson 2J 3R3
作者信息
- 1. 中国科学院长春光学精密机械与物理研究所,
- 2. Transuranium Research Laboratory ( Chemical and Analytical Sciences Division ),
- 折叠
摘要
Abstract
Emission spectra from SrB4O7 doped with Dy2O3 and heated in air have been recorded at room temperature. A change in oxidation state from Dy3+ to Dy2+ was observed. Optimum production of Dy2+ ion occurs when the sample is heated in air at about 650℃. Two broad emission bands centered in the vicinity of 550 and 660nm have been observed from the sample under the excitation of 457.9nm. It is suggested that these bands are due to Dy2 + ion emission from the 5d band into the ground state 4f level (5I8). Several conditions promoting the reduction of Dy3+ion in this matrix are discussed. To aid the reduction of Dy3+ ion, we have also prepared SrB4O7 doped with Dy2O3 in Ar/H2 (4 % ) atmosphere and compared the optical characteristics of Dy2 + ion in these samples with those from the samples prepared in air. The range of g-element reducibility and stabilization in SrB4O7 has been extended from Tm2+[ E0 (Tm3+/Tm2+) = -2.3V] to Dy2+ [E0(Dy3+/Dy2 +) = -2.6V] in the present work; however, the limit of this facile reduction process has not been determined yet.关键词
稀土离子发光/二价镝/SrB4O7分类
数理科学引用本文复制引用
许武,Peterson,J,R..晶态四硼酸锶中二价镝的发射[J].发光学报,2001,22(4):367-672,306.
