Abstract: through solid state reaction , use the natural soda feldspar host material and Sm 3+as activator. The structure of Sm3+doped soda feldspar samples were characterized with X-ray diffraction(XRD) .we have investigated the emission spectra at room temperature , And find out the optimal doping concentration of rare earth ions.The excitation spectra of NaAlSi 3 O8:Sm3+phosphors reveal intensive excitation bands at 402 nm, which match with near-UV LED chips.The emission spectra of the phosphors exhibit four peaks composed of emission peak at 569 nm, 601 nm, 648 nm, and 713 nm, The luminescence intensity firstly increases and then decreases with increasing Sm 3+ doped amount .The emission reaches the maximum intensity at Sm 3 +doped amount of 0 .06 mol , and the concentration quenching mechanism is the electric dipoleelectric dipole interaction .CIE color coordinates of NaAlSi 3 O8:Sm3+ locate in the orangered region ,and are not influenced by Sm 3+concentration .

Key words: through solid state reaction , use the natural soda feldspar host material and Sm 3+as activator. The structure of Sm3+doped soda feldspar samples were characterized with X-ray diffraction(XRD) .we have investigated the emission spectra at room temperature , And find out the optimal doping concentration of rare earth ions.The excitation spectra of NaAlSi 3 O8:Sm3+phosphors reveal intensive excitation bands at 402 nm, which match with near-UV LED chips.The emission spectra of the phosphors exhibit four peaks composed of emission peak at 569 nm, 601 nm, 648 nm, and 713 nm, The luminescence intensity firstly increases and then decreases with increasing Sm 3+ doped amount .The emission reaches the maximum intensity at Sm 3 +doped amount of 0 .06 mol , and the concentration quenching mechanism is the electric dipoleelectric dipole interaction .CIE color coordinates of NaAlSi 3 O8:Sm3+ locate in the orangered region ,and are not influenced by Sm 3+concentration .