共掺杂Y2O3/Eu3+纳米材料的高压研究

项目名称： 共掺杂Y2O3/Eu3+纳米材料的高压研究

项目编号： No.11304380

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 李泽朋

作者单位： 中国民航大学

项目金额： 28万元

中文摘要： 本项目拟以M（M=Bi，K，Ba，Mg）离子共掺杂Y2O3/Eu3+纳米材料为研究对象，利用Raman散射、PL光谱和XRD（含同步辐射X光衍射）技术，高压原位研究共掺杂Y2O3/Eu3+纳米材料在高压下结构变化行为，探索压力下离子间距、YO6八面体的变化行为，揭示Eu离子局域微结构和晶体场的变化规律；研究高压下共掺杂Y2O3/Eu3+纳米材料光致发光光谱在晶格压缩、八面体形变过程的变化规律，明确压力下Eu离子局域微结构变化时的能量传递行为，揭示共掺杂离子在晶格压缩、结构转变以及非晶转变过程中发光增强行为的变化机制；同时研究压力下形貌、尺寸以及掺杂含量等因素对共掺杂Y2O3/Eu3+纳米材料发光性质的影响规律，认识共掺杂体系纳米材料发光性能增强的本质特性，为制备、设计、应用新型共掺杂Y2O3/Eu3+纳米材料提供指导。

中文关键词： 高压；Y2O3；微结构；共掺杂；能量转移

英文摘要： We plan to carry out the high pressure study of Y2O3/Eu3+ nanomaterials codoped with M（M=Bi，K，Ba，Mg）ions by in situ Raman scattering,photoluminescence,and X-ray diffraction(including synchrotron X-ray diffraction) in this program.We will study the behavior of structure change of codoped Y2O3/Eu3+ nanomaterials and explore the changes of ion distance and YO6 octahedron, and reveal the change behvior of local micro-structure and crystal field of Eu3+ under high pressure. We will study the behavior of photoluminescence of codoped Y2O3/Eu3+ nanomaterials during the changes of crystal lattice compression and YO6 octahedron deformation. And we will clear the behavior of energy transmission during the change of local micro-structure of Eu3+ under high pressure. We will reveal the change of luminescence enhancement behavior of codoping ions during crystal lattice compression, structure transion and amorphouzation-transition under high pressure. We will study the influences of morphologies, size and doping content on the codoped Y2O3/Eu3+ nanomaterials under high pressure. Our research will help us realise luminescence essence of codoped nanomaterials and provide us the guidance of fabrication,design and application of new-type codoped Y2O3/Eu3+ nanomaterials.

英文关键词： high pressure；Y2O3；micro structure；codoping；energy transfer