Synthesis and Effect of Partially Replacement of Y3+ to La3+-Ions on Their Photoluminescence Properties of (Y(1-x)Lax)PO4:Eu3+ Phosphor

A series of Eu3+-doped (Y(1-x)Lax)PO4 phosphors were synthesized using a slow evaporation method increasing molar ratios of Le ions in (Y(1-x)Lax)PO4:Eu-0.01(3+). The crystal structure and photoluminescence (PL) with decay curves of the samples were characterized using X-ray diffraction (XRD) and fluorescence spectroscopy, respectively The PL intensity is higher for the monoclinic than tetragonal structure of the (Y(1-x)Lax)PO4:Eu3+ phosphor. The CIE color coordinates shows that the color purity increases, when the Le ions are completely replaced by Y3+ ions.