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In present work, KNa(SO4) phosphors doped with different concentrations of rare earth Eu3+, Sm3+ and Dy3+ ions (0.05, 0.1, 0.3, 0.5, 0.7, 1 mol%) were synthesized using a solid‐state diffusion technique. Photoluminescence (PL) investigations were carried out for the whole range of Eu3+, Sm3+ and Dy3+‐doped phosphors; rare earth ions that retained maximum PL intensity were selected for advanced anionic...