Optimization of Eu 0.6 Gd (0.4-x) Tb x BO 3 phosphor with Tb 3+concentration for X-ray screen material application

초록

In this study, Eu0.6Gd(0.4-x)TbxBO3 (0.000 <= x <= 0.015) phosphors doped with varying concentrations of Tb3+ were synthesized using the solid-state reaction technique at a temperature of 900 degrees C for 18 h. X-ray diffraction (XRD) was employed to analyze the crystal structures of the Triclinic and Hexagonal phases corresponding to EuBO3 (ICSD No 01-089-7888) and EuBO3 (ICDD No 00-013-0485), respectively. The optical properties were analyzed through absorption excitation and emission spectra obtained via photoluminescence (PL) and radioluminescence (RL) techniques. The CIE chromaticity coordinates indicate a reddish-orange. The sample with x = 0.010 exhibited good optical efficiency under both PL (lambda ex = 394) and RL. Furthermore, the radioluminescence performance of the x = 0.010 phosphor was 9.4% higher than that of the undoped phosphor. Samples responding to X-rays can be presented radiography, appearing brighter and clearer. This indicates that the samples exhibit favorable characteristics for application as an X-ray screen.

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