The　exploration　of　red　inorganic　phosphor　component　with　excellent　performance　for　the　development　of　the　display　domain　is　a　scientific　focus　in　recent　years.　In　this　work,　NaAlP　2　O　7　:xEu　3+　(x　=　0,　1,　3,　5,　7,　9,　11,　13%)　phosphors　have　been　synthesized　using　a　facile　solid-state　reaction　method.　In　the　solid　solution,　Eu　3+　ion　successfully　replaces　Na　+　ion　in　NaAlP　2　O　7　host.　To　determine　absorption　properties　of　pure　and　Eu　3+　doped　NaAlP　2　O　7　,　theoretical　computations　and　diffuse　reflectance　absorption　measurements　have　been　implemented.　Photoluminescence　spectra　show　the　red　light　emission　under　the　broad　irradiation　wavelength　region　from　near-UV　to　visible　light.　Under　near-UV　light　(395　nm)　excitation,　it　exhibits　a　strong　red　light　emission　peaking　at　612　nm　(　5　D　0　→　7　F　2　of　Eu　3+　).　The　emission　intensity　reaches　maximum　at　doping　level　of　9　mol%　Eu　3+　,　and　the　concentration　quenching　mechanism　have　been　discussed　in　detail.　For　NaAlP　2　O　7　:9%Eu　3+　,　the　color　purity　of　the　red　light　is　as　high　as　90%,　and　the　internal　quantum　efficiency　is　35.8%.　The　performances　mean　that　NaAlP　2　O　7　:Eu　3+　materials　may　be　potentially　applied　as　red　phosphor　for　near-UV　white　LEDs.　©　2019