Optical spectroscopy of Eu3+ ions doped in YAl3 (BO3)4 crystal
作者： N. Ben Amar , T. Koubaa , M.A. Hassairi , I. Kbaïli , M. Dammak
DOI: 10.1016/J.JLUMIN.2014.11.045
关键词: Atomic physics 、 Absorption (electromagnetic radiation) 、 Radiative transfer 、 Quantum efficiency 、 Electronic structure 、 Ion 、 Spectroscopy 、 Crystal 、 Emission spectrum 、 Chemistry
摘要: Abstract The electronic structure of Eu3+ ions doped in YAl3 (BO3)4 crystal are investigated by means room temperature absorption and emission spectroscopy the 15,000–30,000 cm−1 range. observed transitions assigned analyzed on basis group theory assuming that ion occupies a D3 symmetry site. Free-ion energy diagram is presented corresponding free parameters calculated. Calorimetric red YAB calculated (x=0.67, y=0.32). Judd–Ofelt parameterization applied to analysis spectra. intensities determined as: Ω2=2.26×10–20 cm2, Ω4=5.11×10–20 cm2 Ω6=0.78×10–20 cm2. These used calculate, line strength, radiative transition probability, fluorescence, branching ratio lifetime. 5D0 life time around 3.6 ms compared with experimental value. quantum efficiency about 35%.
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