摘要
通过高温固相方法合成了红色荧光粉Ca3Y2Si3O12∶Pr3+,研究了Pr3+掺杂浓度及助熔剂对荧光粉发光性能的影响。结果显示,所合成的荧光粉的主晶相为Ca3Y2Si3O12。通过分析荧光光谱,发现Ca3Y2Si3O12∶Pr3+硅酸盐荧光粉的有效激发范围可以在430~490nm范围内,并发射红光。在445nm激发下,样品发射光谱中的主发射峰分别位于610nm(3P0→3 H6)和644nm(3P0→3F2),其中610nm处峰值最大。通过改变Pr3+掺杂浓度,发现荧光粉发光强度先增大后减小,最佳Pr3+掺杂量x(Pr3+)为2.0%,超过最佳掺杂浓度表现为由离子间的相互作用导致的浓度淬灭。该荧光粉色温为2261℃。通过观察助熔剂的助熔效果,发现最佳的助熔剂H3BO3添加量为2.0%。
Through traditional high temperature solid-state method at 1400 ℃, the reddish-orange Ca3 Y2 S3O12 ： Pr3＋ phosphors were synthesized. The effects of Pr3＋ doping concentration and fluxing agent on the luminescence property were also studied. It turned out that the principal crystalline phase of the sample was Ca3Y2 Sis O12. The phos- phors could be effectively excited in the range of 430-490 nm. The phosphors emitted reddish-orange light. While ex- citted by 445 nm, the emission peaks mainly located at 610 nm （3P0→3H6, which was the maximum） and 644 nm （3p0→3 F2 ）. With the increasing of the doping concentration of Pr3＋ , the emission intensity increased at first and then decreased slowly. It was also found that the optimum doping content of Pr3＋ was x（Pr3＋ ） =2. 0%. The concentration quenching mechanism led to the decrease of luminescence emission intensity due to the interaction among ions. The co- lor temperature of the phosphors was 2261 ℃. The emission intensity could be increased by adding a certain amount of H3BO3, and the optimum doping mass fraction is 2.0%.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2015年第10期5-8,共4页
Materials Reports
基金
国家自然科学基金(51102095)
高等学校博士学科点专项科研基金(20110076120023)
关键词
发光材料
红色荧光粉
高温固相法
硅酸钇钙
Pr3+掺杂
luminescent material, reddish phosphors, high temperature solid-state method, yttrium calciumsilicate, Pr3＋ doping
作者简介
吕雁鹏：男，1990年生，硕士生，主要从事稀土发光材料的研究E-mail：1109448333@qq．com
朴贤卿：男，1979年生，博士，副研究员，主要从事固体发光材料研究E-mail：xqpiao@ecnu．edu．cn
