[en] Lanthanide(Ln)doped materials find potential applications in the fields of lasers, optical amplifiers, phosphors, display devices, etc., due to their characteristic energy level schemes. These materials found wide useful in the development of plasma display panels(PDP), field emission displays(FED)and electro luminescent panel applications. Recently, REPO₄(RE=Y, La, Gd, Lu)materials have attracted much attention in PDP applications due to their high thermal and chemical stability as well as high luminescence efficiency under VUV excitation. Tricolor inorganic luminescence materials are used in PDP to emit red, green and blue light. PDP phosphors emit visible light under VUV excitation. The VUV pump photon is absorbed by the host lattice and color purity are most essential. It is thus necessary either to further improve the luminescence properties, or to develop new phosphors. It is possible to tune the intensity of red emission by modifying the neighboring network design around Eu³⁺ ions on introducing other atoms such as Ca, Sr, Ba, Zn, Al, Li, Sc, Bi, La, Gd, etc., into the ortho phosphate host lattice. The prepared samples are characterized by XRD, SEM, photoluminescence excitation, photoluminescence emission and lifetime measurements. The results are also compared with those of earlier reported works