Enhancement Of Persistent Luminescence In Ca2sno4: Sm3+
OPTICAL MATERIALS(2021)
摘要
Reddish-orange persistent luminescent Ca2SnO4: 0.1% Sm3+ co-doped with 0-10% Gd3+ was prepared using solid state synthesis. The phase formation and morphology was analyzed using X-ray diffraction and scanning electron microscopy. Incorporation of Sm3+ and Gd3+ in Ca2SnO4 lattice was investigated using site-selective spectroscopy and electron paramagnetic resonance.In all samples reddish-orange persistent luminescence and photochmmic effect was observed after excitation with UV as well as X-rays. The thermostimulated luminescence curves indicated that the introduction of Gd3+ increases the number of shallow traps of charges which enhance the intensity of persistent luminescence. In samples with high Gd3+ content (5-10%) an additional luminescence band in the near-infrared spectral region was detected. The origin of this band was discussed.
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关键词
Persistent luminescence, Ca2SnO4, Thermostimulated luminescence, Afterglow, Electron paramagnetic resonance
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