Abstract
Sm3+ or Tb3+ -doped Lu3Ga2Al3O12 phosphors were synthesized by using a solid-state reaction method with Lutetium oxide, gallium oxide and aluminum oxide as host materials, samarium oxide and terbium oxide as doping materials. The mixed powders were sintered at 1500 °C for 5 hours by using a horizontal furnace. In this study, the structures of Sm3+ or Tb3+ -doped Lu3Ga2Al3O12 phosphors were observed using an XRD (X-ray diffraction). The emission spectrum of Sm3+ -doped Lu3Ga2Al3O12 phosphor shows 550–650 nm in wavelength due to 4Gj to 6Hj. The measurement of emission spectrum of Tb3+ -doped Lu3Ga2Al3O12 phosphor was confirmed to 450 to 650 nm wavelength due to 5Dj to 7Fj. These phosphors have a sharp emission spectrum due to their physical properties of f-f transition. The Lu3Ga2Al3O12 has a high effective Z-number (Zeff = 57) which is sensitive to X-ray or γ-ray. Therefore Sm3+ or Tb3+ -doped Lu3Ga2Al3O12 phosphors can be applied for diagnostic X-ray imaging in the medical field.
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Acknowledgments
This investigation has been funded by the National Research Foundation of Korea (NRF) grant (No.2018R1A6A1A06024970).
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Oh, M.J., Saha, S. & Kim, H.J. The Luminescence Properties of Sm3+ or Tb3+ —doped Lu3Ga2Al3O12 Phosphors for X-ray Imaging. J. Korean Phys. Soc. 75, 957–961 (2019). https://doi.org/10.3938/jkps.75.957
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DOI: https://doi.org/10.3938/jkps.75.957