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研究了Eu~(3+)在RE_2O_3·0.95P_2O_5·0.1SiO_2(RE=La,Gd)基质中的发光。它们的激发光谱包括Eu~(3+)的CTS和f—f跃迁引起的吸收,于254nm附近有强的吸收。另外Gd基质试样在274nm处有一锐线吸收,是由Gd~(3+)的~8S→~6I跃迁产生的,表明Gd~(3+)可以把吸收的274nm波长的能量传递给Eu~(3+)。发射光谱只包括~5D_0→~7F_(0,1,2,3,4)跃迁的窄带谱。讨论了Eu~(3+)在La-Gd基质二元体系中的发光。随着Gd~(3+)含量的变化,可引起发射峰相对强度、CTS能量和发光亮度的连续变化。同时本文对Gd基质中Bi~(3+)通过Gd~(3+)的中间作用向Eu~(3+)传递能量进行了初步讨论。
The luminescence of Eu 3+ in RE 2 O 3 · 0.95P 2 O 5 · 0.1SiO 2 (RE = La, Gd) matrix was studied. Their excitation spectra include the absorption due to CTS and f-f transitions of Eu ~ (3+), with strong absorption around 254 nm. In addition, Gd matrix sample has a sharp absorption at 274nm, which is caused by ~ 8S → ~ 6I transition of Gd ~ (3+), indicating that Gd ~ (3+) can transfer the absorbed energy of 274nm to Eu ~ (3+). The emission spectrum only includes the narrowband spectrum of ~ 5D_0 → ~ 7F_ (0,1,2,3,4) transitions. The luminescence of Eu ~ (3+) in La-Gd matrix binary system was discussed. With the change of Gd ~ (3 +) content, the relative intensity of emission peak, CTS energy and luminescence intensity can be continuously changed. In the meantime, the energy transfer of Eu ~ (3+) to Bi ~ (3+) by Gd ~ (3 +) intermediate in Gd matrix was discussed in this paper.