SrMgSi_2O_6∶Eu^(2+),Dy^(3+)长余辉发光材料的制备及性能

PREPARATION AND PROPERTIES OF LONG AFTERGLOW PHOSPHOR SrMgSi_2O_6 ∶Eu^(2+),Dy^(3+)

分别用高温固相法和静电纺丝法成功制备了蓝色长余辉发光材料SrMgSi2O6∶Eu2+,Dy3+。利用X射线衍射仪、荧光分光光度计、扫描电镜对合成产物SrMgSi2O6∶Eu2+,Dy3+的物相、发光性能及形貌进行了分析和表征。结果表明:SrMgSi2O6∶Eu2+,Dy3+与Sr2MgSi2O7的晶体结构相同,都是四方晶系。高温固相法制得产物的发光性能略优于静电纺丝法所得的产物,SrMgSi2O6∶Eu2+,Dy3+比SrMgSi2O6∶Eu2+的余辉时间长,亮度高。高温固相和静电纺丝法制得的产物形貌分别是块体颗粒和纳米纤维。

Blue long afterglow phosphors SrMgSi2O6：Eu2＋,Dy3＋ were synthesized by the high temperature solid-state method and eletrospinning, respectively. The phase structures, excitation spectra, emission spectra and morphology of the as-synthesized phosphors were analyzed and characterized by X-ray diffraction （XRD）, fluorescence Spectrophotometry and scanning electronic microscope . The results indicated that SrMgSi2O6：Eu2＋,Dy3＋ phos- phors had the same tetragonal crystal structure as Sr2MgSi2OT. Luminescent properties of the as-synthesized phosphors by solid-state method were better than the ones by eletrospin- ning, Compared with SrMgSi2O6 ： Eu2＋, SrMgSi2O6 ： Eu2＋ ,Dy3＋ had higher afterglow brightness and longer duration. The as-synthesized phosphors by high temperature solid- state method were block particles, while the ones by eletrospinning were nanofibers.