Eu2+激活的M7Mg2(SiO4)4C12(M=Ca,Sr,Ba)荧光性质的研究

Study on Luminescence Properties of M7Mg2(SiO4)4C12 (M=Ca, Sr, Ba) Activated by

摘要:

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250~500 nm、250~450 nm、250~430 nm。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（507 nm）、蓝(458、445 nm)不同颜色的发射光

Abstract:

The alkaline earth metal magnesium chlorosilicate M7Mg2(SiO4)4C12:0.08Eu2+(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