采用水热法合成SrM0O_4:Eu3+,SrM0O_4:Tb3+,Eu3+系列荧光粉。利用X射线衍射(XRD)、扫描电镜(SEM)、光电子能谱(EDS)、荧光光谱以及色坐标等研究了所制备荧光粉的结构、形貌和发光性能。XRD检测表明,试样的结构属四方晶系。EDS测试证明,合成样品含有相应组分元素,没有杂质元素。荧光光谱测试表明,在364、385、397、419、467和537nm波长紫外光和可见光的激发下,SrM0O_4:xEu3+的发光光谱由[M004]原子团的3T_1,3T_2-1A_1电荷迁移跃迁峰(536nm波长,绿光),以及Eu3+的5D_0→F1(593nm波长,橙红光),5D_0→7F_2(615nm,红光),5D_0→F_3(646nm,红光)跃迁发光峰组成。在243、253、288、320和396nm波长紫外可见光激发下,srM0O_4:0.05Tb3+,0.05Eu3+的发射光谱包含了:Tb3+的5D_4→7F_6(489nm波长,蓝光)、5D_4→7F_5(546nm波长,绿光)、5D_4→7F_4(582nm波长,黄光)跃迁的发射峰,Eu3+的5D_0→7F_1(593nm波长,橙红光),5D_0→7F_2(615nm波长,红光),5D_0→7F_3(646nm波长,红光)的发射峰。改变激发波长,可以调节SrM0O_4:0.05Tb3+,0.05Eu3+的发光颜色,存在Tb3+→Eu3+的能量传递。
The SrMoO_4 : Eu3+ , SrMoO_4 : Tb3+ , Eu3+ phosphors were synthesized by hydrothermal method. The crystal structure morphology and luminescent properties are studied by X-ray diffraction (XRD), scan electron microscope (SEM), photoelectron spectroscopy (PES), photoluminescence (PL) spectroscopy and long-lasting phosphorescence. The results by XRD indicate SrMoO_4:0. 05 Eu3+ , SrMoO_4:0.10Tb3+ ,0.05Eu3+ belong to a tetragonal crystal system. The PES results reveal that the as prepared SrMoO_4:0. 10Tb3+ ,0.05Eu3+ phosphors are mainly composed of corresponding elements of molecular formula and no other impurity is detected. The emission spectra of SrMoO_4 :xEu3+ excited by 364 nm,385 nm,397 nm,419 nm,467 nm and 537 nm are composed of 3 T1,3 T2-1A1 charge transfer peak of [MoO_4 ] atomic group (536 nm, green) and 5 Do→2 F2 →7F1 (593 nm, orange red) ,5 Do →7F2(615 nm,red),and 5D0→7F3(646 nm,red) emission peaks of Eu3+. The emission spectra of SrMoO_4 : 0. 10Tb3+ ,0.05Eu3+ excited by 243 nm,253 nm,288 nm,320 nm and 396 nm are composed of SD4 →7F6 (489 nm,blue),SD4→7Fs (546 nm,green),SD4→7F4 (582 nm,yellow) of emission peaks Tb3+ and 5 D0→7F1 (593 nm, orange red), 5 Do →7F2 ( 615 nm, red ), and 5 Do→7F3 ( 646 nm, red ) emission peaks of Eu3+. By adjusting excitation spectrum of SrMoO_4 : 0. 10Tb3+ , 0. 05Eu3+ , tunable emission colors are realized in a large color gamut,in which energy transfer from Tb3+ to Eu3+ is observed and discussed in detail.