Dy3+/Tm3+　single　doped　and　co-doped　La3PO7　phosphors　were　synthesized　by　solid　state　reaction　method.　The　single　doped　Dy3+/Tm3+　ions　showed　their　characteristic　emissions　yellow　and　blue.　The　luminescence　intensity　of　this　phosphor　firstly　increased　and　then-decreased　with　increasing　concentration　of　Dy3+　ions.　The　experimental　results　and　the　theoretical　calculation　indicate　that　the　concentration　quenching　mechanism　of　Dy3+　ions　in　La3PO7　is　the　dipole-dipole　interaction.　By　changing　the　doping　concentration　of　Dy3+　and　Tm3+　in　La3PO7,　their　corresponding　color　coordinates　are　very　close　to　the　white　color　chromaticity　coordinates　(x　=　0.33,　y　=　0.33).　These　results　indicate　that　the　La3-x-yPO7:xDy(3+)-yTm(3+)　phosphors　exhibit　great　potential　for　use　as　single-component　phosphors　for　w-LEDs.　(C)　2013　Elsevier　B.V.　All　rights　reserved.