Abstract
A series of powder phosphors with the composition of Ba2-xSmxSiO4 are successfully synthesized by the solid-state reaction method in air. The X-ray powder diffraction patterns, energy disperse spectroscopy spectrum, elemental mapping images, decay curves, and luminescence properties are investigated. The excitation spectrum of Ba2SiO4:Sm3+ phosphor monitored at 598 nm is observed in the region from 200 to 525 nm with some distinct excitation peaks. The emission spectral bands of Ba2SiO4:Sm3+ phosphor with excitation at 402 nm are shown in the range of 425–750 nm due to the 4G5/2 → 6H5/2, 4G5/2 → 6H7/2, 4G5/2 → 6H9/2, and 4G5/2 → 6H11/2 transitions of Sm3+ ions, respectively. The optimal Sm3+ ion doping concentration is ~10 mol% in Ba2SiO4:xSm3+ phosphor. The concentration quenching mechanism is the electric multipole interaction. Ba2SiO4:Sm3+ phosphor has a good thermal stability and the thermal activation energy (Ea) value is ~0.2707 eV.
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