Abstract
The synthesis of BaLn2(1−x)ZnO5:2xTb3+ (Ln = Y, Gd) nanophosphors using solution combustion method with an aim to study the effect of sintering temperature and Tb3+ ions concentration on the luminescent properties has been investigated. Under UV excitation, BaY2(1−x)ZnO5 and BaGd2(1−x)ZnO5 nanoparticles exhibit apparent characteristic green emission from 5D4 state to 7F6−3 states of Tb3+ ions with the strongest at 544 nm. Luminescence concentration quenching could be observed when the Tb3+ ions contents were more than 4 mol% in both nanophosphors. The luminescence decay curves suggest monoexponential behavior of both nanophosphors. X-ray diffraction results confirmed the single-phased orthorhombic structure of both powders belonging to space group Pbnm. TEM analysis indicates the spherical morphology of nanoparticles with average grain size in the range of 85–95 nm. BaY2(1−x)Tb2x ZnO5 and BaGd2(1−x)Tb2x ZnO5 nanophosphors may have potential applications in field emission displays based on their uniform shape, low-cost synthetic route, and diverse luminescent properties.
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