Synthesis and photoluminescence properties of KZnPO4: Dy3+, Sm3+

A series of Dy 3+ /Sm 3+ co-doped KZnPO 4 phosphors were synthesized by the conventional solid-state reaction method. The crystal structure, luminescent characteristic and lifetime were studied by X-ray diffraction, photoluminescence properties and decay life. Dy 3+ /Sm 3+ co-doped and Sm 3+ doped KZnPO 4 phosphors exhibited high crystallinity in structure from XRD results. Under the ultraviolet (UV) or near-ultraviolet (NUV) excitation, KZnPO 4 : Dy 3+ , Sm 3+ phosphors emitted adjustable color coordinates light by changing the content of Sm 3+ ions, which indicated the phosphors might be of potential application in display and lighting. The optimum Sm 3+ concentration is 0.005. Furthermore, energy transfer from Dy 3+ to Sm 3+ was confirmed by the emission spectra and the decay time of co-doped phosphors.