The VUV‐VIS Spectroscopic Properties of Dy³⁺Ion in Phosphors M_5‐2XDy_XNa_X(PO₄)₃F (M=Ca, Sr, Ba) and Their Potential Applications in Mercury‐Free Lamps

Abstract

Abstract The phosphors, fluorapatites M5(PO4)3F (M=Ca, Sr, Ba) activated with Dy3+ ions, were prepared by a high‐temperature solid‐state reaction technique. The VUV‐UV excitation spectra and emission spectra under VUV/UV excitation were measured. The phosphors show broad and strong absorption near 172 nm and intensive emission with the chromaticity coordinates entering the white light region. Hence, the phosphors may be considered as suitable candidates for Hg‐free lamps.