摘要
采用水热法合成SrMoO_4:Eu^(3+),SrMoO_4:Tb^(3+),Eu^(3+)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,SrMoO_4:xEu^(3+)的发光光谱由[MoO4]原子团的3 T1,3 T2-1 A1电荷迁移跃迁峰(536nm波长,绿光),以及Eu^(3+)的5 D0→7 F1(593nm波长,橙红光),5 D0→7 F2(615nm,红光),5 D0→7 F3(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,SrMoO_4:0.05Tb^(3+),0.05Eu^(3+)的发射光谱包含了:Tb^(3+)的5 D4→7 F6(489nm波长,蓝光)、5 D4→7 F5(546nm波长,绿光)、5 D4→7 F4(582nm波长,黄光)跃迁的发射峰,Eu^(3+)的5 D0→7 F1(593nm波长,橙红光),5 D0→7 F2(615nm波长,红光),5 D0→7 F3(646nm波长,红光)的发射峰。改变激发波长,可以调节SrMoO_4:0.05Tb^(3+),0.05Eu^(3+)的发光颜色,存在Tb^(3+)→Eu^(3+)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.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2017年第6期618-624,共7页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(21101133)
国家大学生创新创业训练计划项目(201610719026)
陕西省大学生创新创业训练计划项目(20161523)资助项目
