A　series　of　Na5La1-xEux(WO　4)4　(x=0,　0.05,　0.1,　0.2,　0.3,　0.4,　0.6,　0.8,　1.0)　phosphors　have　been　synthesized　successfully　by　a　solid-state　reaction　technique　and　characterized　by　X-ray　diffraction,　field　emission　scanning　electron　microscopy　(FESEM),　transmission　electron　microscopy　(TEM)　and　Rietveld　refinement.　The　photoluminescent　properties　have　also　been　systematically　investigated　under　the　near-ultraviolet　light.　High　concentration　of　doped　Eu3+　enhanced　the　UV　absorption　and　consequently　red　emission　without　concentration　quenching.　The　Na5Eu(WO4)4　phosphor　was　observed　a　strong　red　emission　under　395　nm　excitation,　bearing　with　47%　quantum　efficiency　and　the　CIE　chromaticity　coordinates　(x=0.67,　y=0.33)　being　close　to　the　National　Television　Standard　Committee　(NTSC)　standard　values.　The　primary　studies　indicate　that　Na5Eu(WO　4)4　is　a　promising　candidate　as　the　red　phosphor　for　white　light-emitting　diodes　(LEDs).　©　2012　Elsevier　B.V.　All　rights　reserved.