荧光粉Ba_(5-3x/2)B_4O_(11):xEu^(3+)的制备及发光性能

Preparation and Luminescence Property of Ba_(5-3x/2)B_4O_(11):xEu^(3+) Phosphor

采用高温固相烧结法成功制备了Ba_(5-3x/2)B_4O_(11):xEu^(3+)(x=0. 02～0. 22)荧光粉,利用XRD和SEM等对荧光粉进行了结构和形貌表征。在激发波长为393 nm的条件下,发射峰(596、621、657和706 nm)与Eu^(3+)的5D0-7FJ(J=1,2,3,4)电子跃迁相对应,其中621 nm最强发射峰由Eu^(3+)离子5D0→7F2电偶极跃迁造成。文章还研究了Eu^(3+)掺杂浓度对Ba_(5-3x/2)B_4O_(11):xEu^(3+)发光性能的影响,结果表明,荧光粉的发光强度随着Eu3+掺杂量的增加呈现先增大后减小的趋势,Eu^(3+)最佳掺杂量为0. 16。

The phosphors,Ba5-3x/2B4O11∶xEu^3+(x=0.02~0.22),were synthesized by high-temperature solid-state reaction method.The luminescence property of Ba5-3x/2B4O11∶xEu^3+was studied in this paper.The phase and surface topographies of as-prepared samples were characterized by X-ray diffraction(XRD)and scanning electron microscope(SEM).This phosphor can be effectively excited at 393 nm and the emission peaks are located at 596 nm,621 nm,657 nm and 706 nm corresponding to the 5 D 0-7 F1J(J=1,2,3,4)transition of Eu 3+ions,respectively.Therein the 5 D 0-7 F 2 electric dipole transition of Eu 3+ions,which locates at 621 nm,is the strongest wave crest.Investigation of Eu 3+content-dependent emission spectra indicates that x=0.16 is the optimum doping content of Eu 3+ions in the Ba 5 B 4 O 11 host.