Blue-emitting　phosphors　Sr6Ca4(PO4)6F2:Eu2+　(SCPF:Eu2+),　Sr6Ca4(PO4)6F2:Eu2+,Dy3+　(SCPF:Eu2+,Dy3+)　and　Sr6Ca4(PO4)6F2:Eu2+,Dy3+,Si4+　(SCPF:Eu2+,Dy3+,Si4+)　with　apatite　structure　were　successfully　synthesized　by　traditional　solid-state　reaction　under　reducing　atmosphere.　Eu2+,　Dy3+　and　Si4+　ions　occupy　the　corresponding　sites　of　Sr2+,　Ca2+　and　P5+.　Strong　broad　blue　photoluminescence　band　is　exhibited　in　SCPF:Eu2+,Dy3+　phosphor　ranging　from　400　to　550　nm　centered　at　455　nm　and　Dy3+　ions　are　vital　in　creating　traps.　Emission　intensity　of　Eu2+,　Dy3+　co-doped　SCPF:0.02Eu2+,0.02Dy3+　is　about　1.8　times　that　of　SCPF:0.02Eu2+　and　electron　trap　centers　serve　as　energy　transporting　media.　To　further　elucidate　the　formation　and　effect　of　the　specific　defect　on　the　luminescence　of　SCPF:0.02Eu2+,0.02Dy3+　phosphor,　the　thermoluminescence　properties,　decay　curves　and　thermal　stability　studies　were　performed　while　the　Si4+-P5+　charge　compensated　phosphor　SCPF:0.02Eu2+,0.02Dy3+,0.02Si4+　was　prepared　as　a　contrast.　All　the　results　of　present　work　indicate　that　Dy3+　co-doping　can　obviously　enhance　photoluminescence　intensity　of　SCPF:0.02Eu2+　by　the　electron　traps　generated　by　non-equivalence　replacement　of　Dy3+-Ca2+.　©　2020　Chinese　Society　of　Rare　Earths