State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China.
Chemistry. 2010 Mar 1;16(9):2930-7. doi: 10.1002/chem.200902834.
Highly uniform pancake-like YBO(3) hierarchical architectures have been successfully prepared by a designed two-step hydrothermal method. Yttrium precursor microprisms were first synthesized according to a simple hydrothermal route. Subsequently, nearly monodisperse multilayered YBO(3) products with a pancake-like shape were synthesized at the expense of the precursor during the hydrothermal process. The whole process was carried out under aqueous conditions without the use of any organic solvent, surfactant, or catalyst. The conversion process from the precursor to YBO(3) products has been investigated by time-dependent XRD experiments. Extending this method, other LnBO(3) (Ln=Ho, Er, Tm, Yb) samples with well-defined shape and dimensionality have also been obtained by a similar synthetic process. The luminescence colors of YBO(3) samples co-doped with Eu(3+) and Tb(3+) under ultraviolet or low-voltage electron beam excitation can be tuned from red, through yellow and green-yellow, to green by simply adjusting the relative doping concentrations of the activator ions. This merit of multicolor emissions in the visible region endows materials of this kind with potential application in the fields of light-display systems and optoelectronic devices.
通过设计的两步水热法成功制备了高度均匀的类饼状 YBO(3) 分层结构。根据简单的水热路线首先合成了钇前体微棱镜。随后，在水热过程中，以牺牲前体的方式合成了几乎单分散的具有类饼状形貌的多层 YBO(3) 产物。整个过程在水相条件下进行，无需使用任何有机溶剂、表面活性剂或催化剂。通过时间相关的 XRD 实验研究了从前体到 YBO(3) 产物的转化过程。通过类似的合成工艺，还扩展了该方法，获得了其他具有良好形貌和维度的 LnBO(3)（Ln=Ho、Er、Tm、Yb）样品。在紫外光或低电压电子束激发下，共掺杂 Eu(3+)和 Tb(3+)的 YBO(3) 样品的发光颜色可以通过简单调整激活剂离子的相对掺杂浓度，从红色、黄色和绿黄色调谐到绿色。这种在可见区域中多色发射的优点使这类材料在光显示系统和光电设备领域具有潜在的应用。
