Host Sensitized White Luminescence of Dy3 + Activated GdPO4 Phosphors

Abstract

White light phosphors have been synthesized by solid-state reaction. The phosphors are characterized by X-ray diffraction patterns, room temperature photoluminescence excitation spectra, and room temperature photoluminescence (PL) emission spectra. Under host sensitization and direct 4f–4f excitation, the activator exhibits bright white light. The dependence of PL spectra on the activator doping concentration (from ) and calcining temperature (800, 900, 1000, 1100, and ) are also studied. The study suggests that the phosphor annealed at for with host sensitization has the strongest white light. The calculated chromaticity coordinates with radiation of all the phosphors fall well in the white region of 1931 Commission International de I’Eclairage diagram. These experimental results indicate that the activated is a promising white light material and has potential applications in lighting technology.