Effect of NH[sub 4]F Flux on Structural and Luminescent Properties of Sr[sub 2]SiO[sub 4]:Eu[sup 2+] Phosphors Prepared by Solid-State Reaction Method

phosphors were prepared by a conventional solid-state reaction method at a relatively low temperature by using as a flux. The effect of flux and doping concentrations on the structural and luminescent properties of was investigated in detail. The structural properties were studied by X-ray diffraction and a field-emission-scanning electron microscope. The blueshift of emission peaks with different concentrations was observed and analyzed. The flux increased the content of monoclinic phase and enhanced the luminescent performance of phosphor significantly, and the flux is more superior to the and fluxes. Our investigation indicates that is a good light-conversion phosphor candidate for near-UV chip and that is a good flux for .