The SrMoO4 phosphors activated by the Pr3+ ions have been synthesized by precursor method conditions using Pr6O11, Na2MoO4·2H2O, and Sr(NO3)2 as raw materials. The crystal structures and morphologies of the products were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectrometry, scanning electronic microscopy, and fluorescence spectrometry. XRD indicated that the phosphors crystallized in the tetragonal system of scheelite type. The excitation spectra show intense broad bands in the 220–300 nm range, and three lines peaking at 450, 472, and 485 nm, which were assigned to the H4–3P2, 3H4–3P1, and 3H4–3P0 absorption transitions of Pr3+. The emission spectrum excited by 224, 241, and 450 nm exhibit sharp lines peaking at 485, 616, and 645 nm, which were assigned to the 3P0–3H4, 1D2–3H4, and 3P0–3F2 absorption transitions of Pr3+, respectively. The concentration of Pr3+ had an obvious influence on the luminescent properties. The emission and excitation intensities reached their maxima when the concentration of Pr3+ reached 4 %.
Research on Chemical Intermediates – Springer Journals
Published: Aug 18, 2013
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