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Pb 2+ doped NaSr 4 (BO 3 ) 3 materials were prepared by a solution combustion synthesis method. The phase analysis of all synthesized materials was carried out using the powder XRD. The synthesized materials were investigated using spectrofluorometer at room temperature. The excitation and emission bands of NaSr 4 (BO 3 ) 3 : Pb 2+ were observed at 291 and 368 nm, respectively. The dependence of the emission intensity on the Pb 2+ concentration for the NaSr 4 (BO 3 ) 3 was studied in detail. It was observed that the concentration quenching of Pb 2+ in NaSr 4 (BO 3 ) 3 is 0.01 mol. The Stokes shifts of NaSr 4 (BO 3 ) 3 : Pb 2+ phosphor were calculated to be 7190 cm −1 . [ABSTRACT FROM AUTHOR]

Pure, Pb 2+ and Bi 3+ doped Li 4 SrCa(SiO 4 ) 2 materials were prepared by using a conventional solid state reaction. The phase of Li 4 SrCa(SiO 4 ) 2 was determined using the powder XRD. The photoluminescent properties of Pb 2+ and Bi 3+ doped Li 4 SrCa(SiO 4 ) 2 materials were investigated using a spectrofluorometer at room temperature. The emission bands of Li 4 SrCa(SiO 4 ) 2 : Pb 2+ and Li 4 SrCa(SiO 4 ) 2 : Bi 3+ were observed at 290 and 380 nm, respectively. Li 4 SrCa(SiO 4 ) 2 with different Pb 2+ and Bi 3+ doping concentrations were analyzed at room temperature. The Stokes shifts of Li 4 SrCa(SiO 4 ) 2 : Pb 2+ and Li 4 SrCa(SiO 4 ) 2 : Bi 3+ were calculated to be 5678 and 5942 cm −1 , respectively. [ABSTRACT FROM AUTHOR]