铽离子掺杂锆酸钡粉体制备及其光学性能研究

Synthesis and Luminescence Properties of Tb^(3+) Doped BaZrO_3 Powders

采用水热法合成了不同铽离子掺杂量的BaZrO_3粉体,采用XRD、SEM、FTIR、荧光光谱仪等检测方法对样品的结构、形貌及光学性能进行表征。对部分水热产物进行煅烧处理,研究温度对其发光性能的影响。结果表明,水热产物均为立方钙钛矿结构,铽离子掺杂进入BaZrO_3晶格,占据B位Zr的位置。样品的微观形貌为粒度分布较为均匀的球体。不同铽掺杂量得到的BaZrO_3球体在244 nm光激发下均观察到了来自基体的宽带发射和Tb^(3+)的特征发射峰,且在Tb^(3+)掺杂浓度为5mol%附近峰值最大。温度对发光性能影响显著,随着煅烧温度的升高,发光强度逐渐减弱。

Tb3＋doped BaZrO3 powders at different Tb3＋ concentrations were synthesized by hydrothermal method. The structure, morphology and luminescence properties of the synthesized materials were examined by X-ray dif- fraction （XRD）, scanning electron microscopy （SEM）, Fourier transform infrared spectrum （FTIR） and fluorescence spectrometer, respectively. Parts of hydrothermal products were calcinated to study the effect of temperature on lu- minescence properties. Analysis results showed that Tb was successfully introduced into the lattice and replaced Zr at B site of perovskite. It was remarkable that all the samples had similar morphology, which was composed of evenly distributed spheres. The broadband emission peaks of the host and the typical emission peaks of Tb3＋ were observed in the BaZrO3 doped with Tb3＋ under 244 nm excitation, and these peaks reach the maximum at Tb3＋ ion content of 5mol%. Temperature had significant influence on their photoluminescence properties. With the calcina- tion temperature increase, the luminescent intensity of Tb3＋ doped samples was decreased.