Preparation and Luminescence of Eu3 + -Activated Ca9ZnLi ( PO4 ) 7 Phosphor by a Solid Reaction–Sintering

Abstract

A red-emitting phosphor, -doped , was synthesized by the solid reaction–sintering process. The morphological features of the phosphor were investigated by scanning electron microscopy. The photoluminescence excitation and emission spectra, fluorescence decay curves, and the dependence of luminescence intensity on temperature were investigated. The phosphor can be excited by near-UV wavelength radiation to realize an intense red luminescence (613 nm) corresponding to the electric dipole transition of ions. The crystallographic site occupations of the ions were investigated by the site-selective excitation spectra and the fluorescence decay in the region under a pulsed, tunable, narrow band dye laser. The potential application of this phosphor for light-emitting diodes was evaluated by the dependence of luminescence and the color coordinates on temperature.