Luminescent properties of Y 3 Al 5−x Ga x O 12 :Ce crystals
2014; Elsevier BV; Volume: 156; Linguagem: Inglês
10.1016/j.jlumin.2014.07.011
ISSN1872-7883
AutoresYu. Zorenko, T. Zorenko, Piotr Malinowski, O. Sidletskiy, S. Neicheva,
Tópico(s)Luminescence Properties of Advanced Materials
ResumoAbsorption, luminescent and scintillation properties of Ce3+ doped Y3Al5−xGaxO12 crystals with Ga content in the x=1–5 range were investigated in this work and compared with the properties of YAG:Ce crystals. Apart from the traditional spectral methods (absorption, cathodoluminescence and light yield measurements), the intrinsic and Ce3+ related luminescence of Y3Al5−xGaxO12:Ce solid-solution were also investigated using the luminescent spectroscopy under excitation by synchrotron radiation in the 3.7–25 eV range. We show that the optical properties Y3Al5−xGaxO12:Ce garnets monotonically change with increasing the Ga content in the x=0–3 range due to preferable localization of Ga ions in the tetrahedral position of the garnet lattice. At the highest Ga concentration (x>3) the deviation of the optical properties of Y3Al5−xGaxO12:Ce garnets is observed from the respective properties of these crystals with Ga content in the x=0–3 range due to occupation by Ga ions of the octahedral position in the garnet host.
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