In　this　study,　novel　Eu3+-,　Dy3+-,　and　Sm3+-activated　Na3La(VO4)2　phosphors　were　synthesized　using　a　solid　state　reaction　method.　X-ray　diffraction　analysis　results　indicated　that　the　Na3La(VO4)2　phosphors　had　an　orthorhombic　crystal　structure　with　the　Pbc21　space　group.　There　were　two　different　La(1)O8　and　La(2)O8　polyhedra　with　high　asymmetry　in　the　crystal　structure.　Scanning　electron　microscopy　revealed　that　the　product　had　a　sheet　morphology　with　an　irregular　particle　size.　Further,　the　luminescence　properties,　including　the　excitation　and　emission　spectra,　and　luminescence　decay　curve,　were　investigated　using　a　fluorescence　spectrometer.　The　results　showed　that　the　Na3La(VO4)2　compound　was　an　excellent　host　for　activating　the　luminescence　of　Eu3+　(614　nm),　Dy3+　(575　nm),　and　Sm3+　(647　nm)　ions.　Further,　Dy3+/Eu3+　co-doped　Na3La(VO4)2　phosphors　were　exploited,　and　the　energy　transfer　from　Dy3+　to　Eu3+　was　demonstrated　in　detail　by　the　photoluminescence　excitation,　photoluminescence　spectra,　and　luminescent　decay　curves.　The　results　showed　that　the　energy　transfer　efficiency　from　Dy3+　to　Eu3+　was　highly　efficient,　and　the　energy　transfer　mechanism　was　dipole–dipole　interactions.　Finally,　tunable　emissions　from　the　yellow　region　of　CIE　(0.3925,　0.4243)　to　the　red　region　of　CIE　(0.6345,　0.3354)　could　be　realized　by　rationally　controlling　the　Dy3+/Eu3+　concentration　ratio.　These　phosphors　may　be　promising　materials　for　the　development　of　solid-state　lighting　and　display　systems.　©　2019　Elsevier　Ltd　and　Techna　Group　S.r.l.