Eu^(2+)激活的M_7Mg_2(SiO_4)_4C1_2(M=Ca,Sr,Ba)荧光性质的研究

Study on Luminescence Properties of M_7Mg_2(SiO_4)_4C1_2(M=Ca,Sr,Ba) Activated by Eu^(2+)

采用高温固相法合成Eu2+激活的碱土金属氯硅酸盐系荧光粉M7Mg2(SiO4)4C12:0.08Eu2+(M=Ca,Sr,Ba),研究了它们的荧光光谱。结果表明,3种荧光粉均为宽带激发,激发带位置分别在250～500nm、250～450nm、250～430nm。讨论了Eu2+离子的跃迁发射随基质组成的变化规律,随着Ca、Sr、Ba离子半径的依次增大,发射波长逐渐向短波方向移动,分别产生绿(507nm)、蓝(458、445nm)不同颜色的发射光。

The alkaline earth metal magnesium chlorosilicate MTMg2（SiO4）4Cl2：0.08Eu2＋（M=Ca,Sr, Ba） phosphors activated by Eu2＋ were synthesized by high-temperature solid-state reaction, and the luminescence properties of the phosphors were studied. Results show that all the three phosphors have broadband excitation spectra with ranges of 250-500 nm, 250-450 nm, 250-430 nm, respectively. The composition dependence of the radiation transitions of Eu2＋ in the host was discussed. The position of emission peak of Eu2＋ moved to short-wavelength and the phosphors emit green （507 nm） and blue （458 nm, 445 nm） light with increasing of radius size of Ca, Sr and Ba ions in sequence.