Effect of BO33− ions on photoluminescence of CaMoO4:Eu3+ phosphor

A series of CaMoO4-BO33−:Eu3+ phosphors with different concentrations of Eu3+ (0, 0.5, 1.0, 1.5, 2.0, and 2.5 mol. %) were prepared using the solid-state reaction method. The crystal structure, particle morphology, and photoluminescence (PL) were characterized by x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectrometry, ultraviolet–vis diffuse reflectance, and PL spectroscopy. The XRD patterns showed that CaMo O 4 − B O 3 3 − : E u 3 + phosphor consisted of a pure phase with a tetragonal structure. The introduction of BO33− ions did not affect the crystal structure of the CaMoO4:Eu3+ phosphors, but it slightly influenced the particle morphology and the peak intensity of the red PL from Eu3+. As confirmed from the FE-SEM data, the shapes and sizes of the particles were modified by the incorporation of BO33− ions. The bandgap was influenced by the incorporation of BiO33− and Eu3+ as confirmed from the diffuse reflectance data. The PL intensity wa...