Controlled chemical co-precipitation and solid phase synthesis,microstructure and photoluminescence of La3PO7:Eu3+ phosphors

Eu³⁺-doped oxy-phosphate (La₃PO₇:Eu³⁺) with monoclinic phase has been synthesized via solid phase and co-precipitation methods. The products present various regular morphologies after high temperature thermal treatment, such as bulk with holes, leaf-like flake, nano-rod and so on. All the phosphors exhibit the characteristic fluorescence of Eu ion, the electric dipole transition ⁵D₀→⁷F₂ of Eu³⁺ ions is dominant indicating that the sites of Eu³⁺ ions in La₃PO₇ have no the inversion center. Furthermore, the intensity of ⁵D₀→⁷F₂ increases due to the introducing of surfactant and increasing of the calcination temperature.