Sm3+掺杂天然钠长石(NaAlSi3O8)荧光粉的发光性质研究

采用高温固相法以天然钠长石为基质,Sm3+为激活剂,制备了Sm3+掺杂天然钠长石的光致发光材料.用X射线衍射(XRD)研究了掺杂Sm3+离子对天然钠长石结构进行研究.在室温下测量了光致发光谱并找出了稀土离子的最佳掺杂浓度.样品在402nm激发下有很强的发射带;与近紫外LED芯片匹配,在402nm近紫外光激发下NaAlSi3O8:Sm3+的发射光谱由4个峰组成,发射峰值分别位于569nm、601nm、648nm、713nm.随着Sm3+掺量的增加,样品发光强度先增强后减弱,当Sm3+掺量为0.06mol时发光强度达到最大,浓度猝灭机理为电偶极-电偶极相互作用.分析了不同Sm3+掺杂浓度样品的荧光衰减时间.NaAlSi3O8:Sm3+的色坐标基本不变,位于橙红色区域.

Luminescent Properties of Sm3+Doped Natural Soda Feldspar ( NaAlSi3 O8 ) Phosphors

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 .