Yellow phosphors Ba2Mg(PO4)2: Eu2+ fit for white light-emitting diodes prepared with sol-gel precursor route

Yellow/orange-emitting Ba₂Mg(PO₄)₂: Eu²⁺ phosphors with uniform particle size distribution were successfully prepared by Pechini sol-gel method. The emission spectra of Ba_2-xMg(PO₄)₂: xEu²⁺ phosphor displayed one broad band centered at about 560 nm which can be assigned to the 4f⁶5d¹→4f⁷ transitions of the Eu²⁺. Along with the increasing of the Eu²⁺ doping amount the emission peak intensity increased till the Eu²⁺ concentration ratio is 4 mol%. In Ba₂Mg(PO₄)₂: Eu²⁺ phosphors, Eu²⁺ ion occupy two different lattice sites by substitution for Ba²⁺ ions. with the increase of the doping concentration of Eu²⁺ ion, the ability for Eu²⁺ enter into the first site of Ba₂Mg(PO₄)₂ in the lattice is increasing.