Si3N4　modified　Li2Sr0.995SiO4:0.005Eu(2+)　(Li2Sr0.995SiO4-3x/2Nx:0.005Eu(2+))　phosphors　were　synthesized　with　the　conventional　solid-state　reaction　in　the　reduced　atmosphere.　The　crystal　structure　and　vibrational　modes　were　analyzed　by　X-ray　diffraction,　Raman　scattering　spectroscopy　and　Rietveld　crystal　structure　refinement.　Photoluminescence　(PL)　and　photoluminescence　excitation　(PLE)　spectra　showed　that　Li2Sr0.995SiO4-3x/2Nx:0.005Eu(2+)　powder　exhibited　a　broad　yellow　emission　band　centered　at　560　nm　under　the　excitation　of　460　nm　visible　light,　due　to　the　4f(6)5d(1)　-＞　4f(7)　transition　of　Eu2+.　The　partial　nitridation　of　Li2Sr0.995SiO4-3x/2Nx:0.005Eu(2+)　(x=0.01)　phosphors　led　to　a　large　enhancement　in　the　luminescence　intensity,　as　much　as　190%.　At　the　same　time,　the　fluorescence　decay　behavior　curves　further　showed　that　the　photoluminescence　efficiencies　of　Li2Sr0.995SiO4-3x/2Nx:0.005Eu(2+)　phosphors　were　enhanced　by　addition　of　Si3N4.　The　temperature　quenching　characteristics　confirmed　that　the　oxynitride　based　Li2Sr0.995SiO4-3x/2Nx:0.005Eu(2+)　showed　slightly　higher　stability.　It　is　implied　that　Li2Sr0.995SiO4-3x/2Nx:0.005Eu(2+)　phosphors　had　a　possible　potential　application　on　white　LEDs　to　match　blue　light　chips.　(C)　2015　Elsevier　Ltd.　All　rights　reserved.