光学学报, 2013, 33 (8): 0816003, 网络出版: 2013-07-09
ZnWO4:Eu3+纳米棒的制备与荧光特性
Preparation and Photoluminescence Property of ZnWO4:Eu3+ Nanorods
材料 水热法 钨酸锌 稀土离子 光致发光 能量转移 materials hydrothermal method zinc tungstate rare earth ion photoluminescence energy transfer
摘要
通过简单的水热法制备了单分散的ZnWO4和ZnWO4:Eu3+纳米棒。用X射线衍射图谱和透射电镜分析了材料的结构和形貌,所得纳米棒均为钨锰铁矿纯相,且Eu3+离子完全进入晶格中。ZnWO4:Eu3+纳米棒的直径为20~40 nm,长度为50~70 nm。测试了ZnWO4和ZnWO4:Eu3+的激发光谱和发射光谱,结果表明WO2-4基团可以有效地转移能量至Eu3+离子。ZnWO4:Eu3+的发射光谱表明,Eu3+离子的电偶极跃迁5D0-7F0的特征峰很弱,而5D0-7F2的电偶极跃迁很强,表明Eu3+离子处于晶体的低对称位置。
Abstract
Monodisperse ZnWO4 and Eu3+-doped ZnWO4 nanorods are prepared via a simple hydrothermal method. The structure and morphology are characterized through X-ray diffraction pattern and transmission electron microscope. The nanorods are pure wolframite and Eu3+ ions completely enter into the lattice. The diameters of ZnWO4:Eu3+ nanorods are about 20~40 nm and the lengths are about 50~70 nm. The excited and photoluminescence spectra of ZnWO4 and Eu3+-doped ZnWO4 nanorods indicate an energy transfer from WO2-4 groups to Eu3+ ions. Electric dipole transition 5D0-7F0 of Eu3+ ion is weak, while electric dipole transition 5D0-7F2 is very strong, which indicates that Eu3+ ions are in C2 symmetry points of the lattice.
樊婷, 吕健滔. ZnWO4:Eu3+纳米棒的制备与荧光特性[J]. 光学学报, 2013, 33(8): 0816003. Fan Ting, Lü Jiantao. Preparation and Photoluminescence Property of ZnWO4:Eu3+ Nanorods[J]. Acta Optica Sinica, 2013, 33(8): 0816003.