Vacuum Ultraviolet Spectral Investigations on Green-Emitting Ca(La, Gd)4Si3O13: Tb3+ Phosphors for PDP Applications

In an effort to develop new green-emitting PDP phosphors with high efficiency, investigated were the synthesis, VUV photoluminescence (PL) spectra, optical properties, and chromaticity of Ca(La1-x-yTbxGdy)4Si3O13 phosphors by using synchrotron radiation. Upon analysis of the VUV spectroscopic and chromaticity investigations on the new green-emitting VUV phosphors, were an optimized composition achieved. The PLE spectral studies show that Ca (La1-x-y TbxGdy) 4Si3O13 exhibit significant absorption in the VUV range. The VUV PL intensity was found to enhance with Gd3+ -doping. Furthermore, the 1931 CIE chromaticity coordinates of Ca(La, Gd)4Si3O13:Tb were found, to be, (0.286, 0.548), as compared to (0.230, 0.712) for Zn2SiO4:Mn2+ as a reference. The potential application of Ca(La,Gd)4Si3O13: Tb as a new green-emitting PDP phosphor are being currently improving and evaluating.