In　the　current　work,　a　series　of　Lu1.5Y1.5Al5O12　(LuYAG)　phosphors　doped　with　different　Dy3+　ion　concentrations　(0.5,　1,　2,　3,　4,　and　5　at%　in　nominal)　have　been　synthesized　by　high-temperature　solid-phase　approach　and　characterized　by　X-ray　diffraction,　scanning　electron　microscopy　and　energy　dispersive　X-ray　spectroscopy,　transmission　electron　microscopy,　optical　absorption,　emission,　and　decay　lifetimes.　The　shape　and　position　of　Dy3+　ion　absorption　peaks　were　consistent　in　all　samples,　and　the　absorption　peak　intensity　increased　with　enhancing　Dy3+　concentration.　Under　lambda　exci.　=　448　nm,　F-4(9/2　)-＞　H-6(15/2),　13/2,　11/2,　9/2　emission　transitions　have　been　identified　in　which　the　F-4(9/2)-＞　H-6(13/2)　transition　possesses　the　highest　intensity.　Luminescence　decay　times　were　evaluated　for　Dy3+:　F-4(9/2)　level.　Relying　on　the　absorption　and　luminescence　spectra,　along　with　fluores-cence　decay　patterns,　the　optimal　doping　concentration　of　1　at%　was　identified.　The　energy　transfer　process　between　Dy-Dy　ions　was　discussed　and　utilized　to　explain　the　concentration　quenching　phenomenon.　Notably,　1　at%　Dy:　LuYAG　could　be　used　as　a　potential　candidate　for　commercial　yellow　phosphors.