Tb3+浓度对SrMoO4:Tb3发光性能的影响

采用溶胶-燃烧法合成了Tb3+掺杂的SrMoO4荧光粉并研究了它的发光性能.X射线衍射(XRD)显示,前驱物在750℃下灼烧3h得到的样品为纯相的SrMoO4.样品的激发谱由一宽带和一组窄峰组成,其中激发强度较强的峰位于288 nm和375 nm.发射谱由4组窄带组成,其中最强峰位于548 nm.对于548 nm(5 ...

Influence of Tb~(3+) Concentration on The Luminescent Properties of SrMoO_4:Tb~(3+)

Trivalent terbium (Tb³⁺) doped strontium molybdate (SrMoO₄) was synthesized by sol-combustion method and the crystal structure and luminescent properties were investigated in this paper. The X-ray diffraction patterns (XRD) showed that the phosphors sintered at 750 ℃ for 3 h were pure SrMoO₄ phase. The excitation spectrum consisted of a broad band and a series of narrow bands, in which the higher energy peaks located at 288 nm and 375 nm, respectively. The emission spectrum was composed of four narrow bands and the strongest emission peak was located at 548 nm. The appropriate doping molar fraction of Tb³⁺ was 0.05 for the 548 nm emission. The concentration quenching of 548 nm (⁵D₄→⁷F₅) was attributed to d-d interaction. When the dosage of urea was 3 times of theory dosage, the luminescent intensity reached the maximum. The optimal sintering temperature and time were 750 ℃ and 3 h, respectively. These results showed that this Tb³⁺ activated SrMoO₄ was a promising green phosphor for ultraviolet (UV) and blue InGaN-based white LED.