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KMID : 1151820180120040451
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Journal of the Korean Society of Radiology
2018 Volume.12 No. 4 p.451 ~ p.457
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Optical spectroscopy of Tb3+ ions doped NaCa(PO3)3 phosphors
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Yoon Chang-Yong
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Abstract
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Luminescence properties of NaCa(PO₃)₃ doped with Tb³+ ions are investigated by optical and laser excitation spectroscopy. The phosphors were prepared by solidstate reaction method The X-ray diffraction(XRD) was used to analyze the crystal structure and the crystallinity of the samples. The excitation and emission spectra and decay curve of NaCa(PO₃)₃ : Tb³+ (0.01~30mol%) were measured at room temperature. The f-d band of Tb³+ is observed in the excitation spectra of NaCa(PO₃)₃:Tb³ in the wave length region 205~245nm. Strong emission lines due to the 5 D₄→ 7 F J transition and weak emission lines due to the 5 D₄→ 7 F J transition are observed in the emission spectra of NaCa(PO₃)₃: Tb³+. The energy transfer and cross relaxation between Tb³+ ions are discussed in NaCa(PO₃)₃: Tb³+ in the emission spectra and life time.
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KEYWORD
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Luminescence, X-ray diffraction, Energy transfer
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