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KMID : 1151820150090030169
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Journal of the Korean Society of Radiology
2015 Volume.9 No. 3 p.169 ~ p.174
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A Study on the Luminescence Properties of LiGd9(SiO4)6O2:Ce3+
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Jin Seong-Jin
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Abstract
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LiGd9(SiO4)6O2:Ce3+ phosphors were synthesized by solid-state reaction method. The structural characteristic was investigated by X-ray powder diffraction analysis. The emission and excitation spectra of the Ce3+ ions doped LiGd9(SiO4)6O2 phosphors were obtained under the UV excitation. The emission spectra of LiGd9(SiO4)6O2:Ce3+ shows the band at 410 nm corresponding to the 2F5/2 and 2F7/2 states of Ce3+. The red shift of Ce3+ emission is found as the Ce3+ concentration increases, which could be explained by the change in crystal-field symmetry and strength with increasing Ce3+ concentration. Fluorescence decay time of Ce3+ was about 20 ns. When the concentration of Ce3+ increases life time was slightly reduced.
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KEYWORD
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lithium gadolinium silicate, luminescence, spectrum, life time
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