Luminescent Properties and Energy Transfer of Ce3+,Tb3+ Co-Doped NaBaPO4 Phosphor

Ce 3+ and Tb 3+ co-doped NaBaPO 4 phosphors were prepared by a conventional solid-state reaction. The phase structure and luminescence properties of the as-prepared phosphor samples were characterized by using powder X-ray diffraction (XRD), reflection spectra, photoluminescence excitation and emission spectra, decay time, respectively. Effective energy transfer occurs from Ce 3+ to Tb 3+ in NaBaPO 4 host due to the observed spectral overlap between the emission band of Ce 3+ and the excitation band of Tb 3+ , and the obvious emission bands (354 nm, 489 nm and 542 nm) were ascribed to Ce 3+ and Tb 3+ ions emission, respectively. We have also shown that the energy transfer from Ce 3+ and Tb 3+ in NaBaPO 4 host was demonstrated to be resonant type via a dipole-dipole interaction mechanism with the energy transfer critical distance of 1.67 nm.