Abstract
Eu2+ and Ce3+ ions with different concentrations of single/co-doped Sr2SiO4 phosphors have been successfully prepared using a high-temperature solid-state reaction. The influences of Eu2+ and Ce3+ ions on the construction and optical performance behavior of Sr2SiO4 have been investigated by X-ray diffraction (XRD), Fourier Transform Infrared Spectrometer (FTIR), scanning electron microscope (SEM), ultra-violet-visible (UV–vis), and photoluminescence (PL) spectral analyses. XRD results revealed that the doping ions have entered the host lattice, and SEM showed the crystallite sizes have been found to vary from 1 to 6 μm. The intensity of the absorption spectra for the co-doped samples was larger than that of the single-doped sample. PL spectra displayed that the emission intensity of the samples strengthened as the amount of concentrations of Eu2+ and Ce3+ ions. The concentration quenching of single/co-doped phosphors was related to dipole-dipole interaction, and the energy from the 2F5/2 transition to the 5D level of Ce3+ was effectively transferred to the 4f65d level of Eu2+. The Eu2+ and Ce3+ ions co-doping samples resulted in a light green color. The findings from the study reveal that the Eu2+ and Ce3+ ions single/co-doped Sr2SiO4 phosphors would be potential candidates for the LED application.
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