首页
登录
注册
NaLa（MoO4）2∶Eu^3＋的水热调控合成与发光特性研究
Hydrothermal controlled synthesis and luminescence properties of NaLa（MoO4）2∶Eu^3＋ microcrystals
-
摘要: 采用水热法合成了不同粒径的NaLa（MoO4）2∶Eu3＋微晶.通过调节乙二醇浓度和反应时间,研究了NaLa（MoO4）2∶Eu3＋微晶的形貌演变过程,在水热条件下180℃反应16h获得了均一梭子形NaLa（MoO4）2∶Eu3＋微晶,其晶粒长度约为2.0μm.荧光光谱分析表明,Eu3＋取代了NaLa（MoO4）2中La3＋的格位,Eu3＋在613nm处红光发射（5D0—7F2跃迁）的浓度猝灭机理是电偶极-电四极相互作用,并发生了Eu3＋（5D1）＋Eu3＋（7F0）→Eu3＋（5D0）＋Eu3＋（7F3）交叉弛豫,由此导致浓度猝灭.Abstract: Eu3＋ doped NaLa（MoO4）2 microcrystals with different sizes are synthesized by a mild hydrothermal method,and the morphologies of the microcrystals can be easily controlled by adjusting the volume ratio of ethylene glycol to water and the aging time.Uniform high-quality shuttle-like microcrystals with an average length of 2.0 μm are obtained under the hydrothermal condition of 180℃ for 16 h.From the emission spectra of NaLa（MoO4）2：Eu3＋ microcrystals,it is concluded that the dopant Eu3＋ ion occupies a La3＋ site.It is indicated that the concentration quenching of the emission peak at 613 nm of Eu3＋ is ascribed to the electric dipole-electric quadrupole interaction,and the cross relaxation process of Eu3＋（5D1） ＋ Eu3＋（7F0）→ Eu3＋（5D0） ＋ Eu3＋（7F3） appear.
-
-
计量
- 文章访问数: 384
- HTML全文浏览数: 32
- PDF下载数: 0
- 施引文献: 0
下载: