Enhanced luminescence of Ba3La(PO4)(3):Dy3+ by codoping Gd3+ ions and energy transfer between Gd3+ and Dy3+

摘要

The orthophosphate phosphors, Ba3La(PO4)(3) activated with Dy3+ and Gd3+-Dy3+ ions, were prepared by a solid reaction technique at high temperature. Their spectroscopic properties were investigated in the vacuum ultraviolet (VUV)-visible range. We found that the introducing of Gd3+ greatly enhances the Dy3+ luminecence under 172 nm VUV excitation. The measurements on excitation spectra, emission spectra, and luminescence decay curves revealed that the energy transfer between Gd3+ and Dy3+ becomes more and more efficient with the increasing Gd3+ contents, (C) 2008 Optical Society of America