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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]

Abstract: Li6CaB3O8.5: M3+ (M3+: Dy and Sm) phosphors were synthesized by a solution combustion synthesis. The synthesized materials were characterized by using the powder XRD. The emission and excitation spectra of these materials were measured at room temperature with a spectrofluorometer. Both Li6CaB3O8.5: Dy3+ and Li6CaB3O8.5: Sm3+ phosphors emit red, yellow and green light. Consequently, these materials are promising phosphors for white LEDs. [Copyright &y& Elsevier]

Abstract: Pure, Pb2+ and Bi3+ doped LiCaBO3 materials were prepared by a solution combustion synthesis method. The phase of LiCaBO3 were determined using the powder XRD and FTIR. The photoluminescent properties of Pb2+ and Bi3+ doped LiCaBO3 materials were investigated using spectrofluorometer at room temperature. The emission bands of LiCaBO3: Pb2+ and LiCaBO3: Bi3+ were observed at 296 and 378nm, respectively. LiCaBO3 with different Pb2+ and Bi3+ doping concentrations were analyzed at room temperature. The Stokes shifts of LiCaBO3: Pb2+ and LiCaBO3: Bi3+ were calculated to be 3952 and 6440cm−1, respectively. [Copyright &y& Elsevier]