Synthesis of Red Phosphor CaZrO₃:Eu³⁺ for White Light-Emitting Diodes

A red-emitting CaZrO₃:Eu³⁺ phosphor has been prepared by solid state reaction and its luminescent properties are studied. The crystal structure is investigated by the x−ray diffraction. Through energy transitions of ⁵D₀→⁷F_J (J=0, 1, 2, 3) in Eu³⁺ ions, the emission spectrum of the phosphor shows a series of narrow bands under near−ultraviolet light and the strongest peak locates at 613 nm. The emission intensity of Ca_1-xZrO₃:xEu³⁺ phosphor will reach the maximum as the molar concentration of Eu³⁺ is 5 mol%.