A　series　of　novel　phosphors,　specifically　Eu3+-doped　and　Eu3+/M+　co-doped　(M　=　Li+,　Na+,　K+)　SrLaNaTeO6,　were　synthesized　via　a　high-temperature　solid-state　process.　The　luminous　properties　and　thermal　stability　of　these　phosphors　were　thoroughly　investigated.　When　subjected　to　the　appropriate　excitation　wavelengths　(395　and　465　nm),　all　phosphors　demonstrate　a　pronounced　red　light　emission,　corresponding　to　the　5D0→7F2　transition　of　Eu3+.　The　researchers　found　that　the　most　effective　concentration　of　Eu3+　doping　in　the　Sr1-xLaNaTeO6:xEu3+　phosphor　was　discovered　to　be　x　=　0.25.　It　was　shown　that　excessive　doping　leads　to　concentration　quenching,　which　can　be　attributed　to　the　energy　transfer　interaction　between　Eu3+　ions.　The　incorporation　of　Li+,　Na+,　and　K+　as　charge　compensation　ions　in　conjunction　with　Eu3+　in　Sr0.75LaNaTeO6:0.25Eu3+　phosphor　leads　to　a　notable　enhancement　in　light　intensity.　Notably,　the　phosphor　co-doped　with　Na+　exhibits　the　highest　luminous　intensity　among　the　alkali　metal　charge　compensation　ions.　The　near　proximity　of　the　ion　radius　of　the　charge　compensation　ion　Na+　to　that　of　Sr2+　in　the　host　facilitates　the　occupation　of　the　Na　+　ion　in　the　Sr2+　lattice　location.　Sodium　ions　(Na+)　have　the　ability　to　counteract　the　positive　defects　resulting　from　the　substitution　of　europium　ions　(Eu3+)　with　strontium　ions　(Sr2+),　hence　maintaining　charge　neutrality.　Additionally,　it　should　be　noted　that　Sr0.5LaNaTeO6:0.25Eu3+,0.25Na+　phosphor　exhibits　a　remarkable　quantum　yield　of　71.26　%　and　lacks　thermal　quenching.　These　characteristics　suggest　that　this　particular　phosphor　holds　promising　potential　for　utilization　in　developing　white-light-emitting　diodes.　©　2024　Elsevier　Ltd　and　Techna　Group　S.r.l.