新型LED红色荧光材料Ca_xSr_(1-x-y-z)MoO_4:yEu~(3+);zNa~+的制备和表征

利用Na+为电荷补偿剂制备CaxSr1-x-y-zMoO4:yEu3+,zNa+红色LED荧光粉体.研究了电荷补偿剂的用量、基质材料中Ca2+的含量、合成温度、反应时间及发光中心Eu3+摩尔分数对荧光材料晶体结构和发光性能的影响.结果表明:最佳工艺条件为电荷补偿剂摩尔分数为6%,Eu3+摩尔分数为8%,Ca2+摩尔分数为60%,反应温度900℃和反应时间2 h.光谱测试结果表明,该荧光材料可被311,395或465 nm有效激发,发射峰在616 nm.

Preparation and Characterization of a New Red-Emitting Phosphor Ca_xSr_(1-x-y-z)MoO_4:yEu~(3+),zNa~+ for LED

The CaxSr1-x-y-zMoO4: yEu³⁺, zNa⁺ as a red phosphor was prepared for LED by solid-state reaction with Na⁺ as charge compensating agents. The effects of Na⁺ dose, Ca²⁺ content in matrix, synthesizing temperature, reaction time and the molecular fraction of Eu³⁺ as luminescent center on the luminescent properties and crystal structure of the phosphor were studied. The results showed that the optimum reaction conditions in molecular fraction are 6% Na⁺, 8% Eu³⁺ and 60% Ca²⁺ with reaction temperature 900 °C for 2 h. The luminescent spectra revealed that the red-emitting phosphor can be effectively excited at 616 nm emitting peak by 311 nm, 395 nm or 465 nm.