The　advancement　of　Eu2+-activated　luminescent　materials　tailored　to　exhibit　a　range　of　properties　is　crucial　for　addressing　the　specific　demands　of　various　application　fields.　However,　the　lack　of　suitable　lattice　sites　in　numerous　compounds　for　stable　Eu2+　incorporation　restricts　their　potential　for　diverse　optical　properties.　Herein,　a　facile　strategy　of　carbon　and　hydrogen　coreduction　utilizing　graphite　crucibles　is　proposed　to　effectively　achieve　the　impressive　luminescence　of　Eu2+　at　trivalent　Y　sites　in　Rb3Y(PO4)(2):Eu　phosphors.　Rb3Y(PO4)(2):Eu　exhibits　blue-violet　emission　when　Eu2+　predominantly　occupies　the　Rb1　and　Rb2　sites.　Inspiringly,　by　facilitating　the　reduction　of　more　Eu3+　to　Eu2+,　a　yellow　emission　band　at　550　nm　arising　from　Eu2+　at　Y　sites　emerges,　enabling　the　realization　of　single-component　white-emitting　and　yellow-emitting　Rb3Y(PO4)(2):Eu　phosphors.　The　diverse　luminescent　properties　of　Rb3Y(PO4)(2):Eu　expand　its　potential　applications　in　different　white　light　source　devices　and　optical　thermometry.　This　work　presents　an　innovative　synthetic　strategy　to　develop　remarkable　Eu2+　luminescence　at　trivalent　cation　sites,　thereby　broadening　the　optical　properties　of　the　material　and　enabling　multifunctional　applications.