Photoluminescent properties and luminescent thermal stabilities of 100 mol% activator Tb2(MoO4)3 green phosphor
Abstract
100 mol% activator orthorhombic Tb2(MoO4)3 green phosphors were prepared using a solid-state reaction method. The impact of sintering temperature on the crystalline phase structures, the compositions, the sizes and morphologies of particles, the values of energy bandgap (Eg), the photoluminescence (PL) excitation and emission spectra, the fluorescence lifetimes, PL quantum yield (PLQY), and the luminescent thermal stabilities of the prepared material were comprehensively investigated. The particle size increased from 2.54 to 5.81 μm and the Eg decreased from 3.60 to 3.41 eV with the calcine temperature increased from 800∘C to 1100∘C. The Tb2(MoO4)3 green phosphor prepared at 1000∘C exhibited optimal PL intensity though it did not possess the highest PLQY with 380 nm excitation. Moreover, the sample prepared at 1000∘C showed better thermal stabilities than that prepared at 1100∘C. The research proved the sintering temperature has great effects on the properties of Tb2(MoO4)3 phosphors.
