Luminescence Studies of Transition Metal (Cu+ and Ag+ Ions) Activated Alkali Zinc Mixed Phosphate

Because of the importance of inorganic phosphates in the solid-state lighting industry, KZnPO₄ doped with some transition metal dopant ions like Cu⁺ and Ag⁺ ions were prepared by low-cost co-precipitation method at room temperature followed by annealing at a high temperature around 650⁰C. The prepared phosphors were characterized by X-ray diffraction. In the case of a Photoluminescence study for KZnPO₄ doped with Cu⁺, the emission was observed at 425 nm, which corresponds to the emission of Cu⁺ ion. In the case of Ag⁺ doped KZnPO₄, weak emission was observed at 420 nm, which is assigned to the emission of Ag⁺ ions.  CIE chromaticity coordinate of KZnPO⁴ doped with Cu⁺ and Ag⁺ ions phosphor was also evaluated via using OSRAM SYLVANIA color calculator and colour purity of concentration was nearly 95% of Cu⁺ and Ag⁺ ions. The obtained outcomes revealed that the prepared phosphor shows potential application in the field of solid-state lighting.