利用多面体模块构建新型荧光材料基质及其对发光性能的调控研究

项目名称： 利用多面体模块构建新型荧光材料基质及其对发光性能的调控研究

项目编号： No.51272242

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 一般工业技术

项目作者： 夏志国

作者单位： 中国地质大学（北京）

项目金额： 80万元

中文摘要： 从矿物晶体化学入手开发新型荧光材料基质，探讨结构与发光性能关联规律具有重要科学意义。本项目以无机荧光材料中常见的石榴石、磷灰石和黄长石结构为模型，根据其对称性较高而化学组分相对复杂的特点，利用无机多面体模块和相应的阳、阴离子组合替换并构建新型荧光材料基质，结构设计中突破异质同构化合物类型的限制，获得由新型单一(复合)模块构筑的同构固溶体或衍生结构新相。通过晶体生长、单晶结构解析和粉晶Rietveld结构精修等技术确定新物相晶体结构，分析结构中多面体模块及阳、阴离子的类型、电荷、尺寸以及晶格扭曲程度等对晶体结构稳定性的影响和相应成相规律。结合荧光材料制备新方法获得单相材料，研究Eu2+、Ce3+等掺杂离子在其中的发光，以及基质组成、结构与发光性能的相互关系，实现对其激发、发射波长的调控、优化其发光效率和稳定性，为探索适合于w-LEDs、PDP和LLP应用的新型高效发光材料奠定理论和实验基础。

中文关键词： 稀土发光材料；结构调控；多面体模块；发光性能；

英文摘要： There will be important scientific significances on the development of the novel phosphor hosts and the investigation of relationship between structure and property from the viewpoint of mineral crystal chemistry. The garnet-, apatite- and melilite-type compounds used as phosphor hosts will be regared as the main research objects and models, and some proper polyhedron modules, anions and cations will be selected and modified to construct the novel phosphor hosts based on their high symmetry and complex chemical components. The restriction of different types of iso-structural compounds will be eliminated. Therefore, some new inorganic solid solutions with garnet-, apatite- and melilite-type mineral structure, and some new phases with derived structure from the initial mineral will be formed based on the designed single (multiple) modules. By using the strategies of crystal growth, single crystal structure solving technique and powder structure Rietveld refinement, some new crystal structures will be resoveld. The effect of stability of structural phase and some rules on the phase formation will be discussed from the comprehensive consideration of type, charge, size, and distortion of the polyhedrons, anions and cations. Some new preparation method will be also devoloped to prepare new phosphors with pure phase. A

英文关键词： Rare earth doped luminescence materials；Structural modification；Polyhedron modules；Luminescence property；