Ho3+激活上转换微纳米晶的优化设计、制备和性能研究

项目名称： Ho3+激活上转换微纳米晶的优化设计、制备和性能研究

项目编号： No.51302228

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 唐剑锋

作者单位： 西南大学

项目金额： 25万元

中文摘要： 稀土激活微纳米晶材料可在相对较低强度光激发下实现高效率的上转换发光，在三维显示、新能源和生物技术等领域均有重要应用。以Yb3+、Tm3+等稀土离子敏化，采用近红外半导体激光激发，通过Ho3+的5F4,5S2->5I8和5F5->5I8跃迁分别实现绿光和红光发射是上转换的理想途径之一。但由于缺乏对基质组成、结构以及掺杂离子浓度与上转换性能关系的系统性研究，Ho3+激活微纳米晶的上转换发光效率仍相对较低，未能满足许多实际应用的需求。本项目计划系统深入地研究基质组成、结构与影响Ho3+上转换性能的各种机制之间的关系，获得结构与性能关系的规律性认识，对基质的关键功能和结构基元进行设计和选择，并对敏化和激活离子浓度进行优化，最终获得上转换性能优异的新型Ho3+激活微纳米晶，为上转换材料的应用奠定基础。

中文关键词： Ho3+；上转换发光；氧化物基质；；

英文摘要： Rare earth activated micro-nanocrystalline materials have important applications in the three-dimensional display, new energy, and bio-technology because of their high efficient upconvertion luminescence after being excited by some relatively low-intensity light. By using either Yb3+ or Tm3+ as sensitizer, the Ho3+ can generate bright green (5F4,5S2->5I8) and red (5F5->5I8) emission when excited by a near infrared laser diode, which is one of the ideal ways to realize upconvertion luminescence in visible range. However, due to lack of systematically research on the relationship between properties of matrix crystal and upconversion performance, the upconversion efficiencies of Ho3+ activated micro-nanocrystalline materials are so low that they fail to meet the needs of many practical applications. In this work we plan to systematically examine and discover the relationship laws between composition-structure characteristics of matrix and energy transfers which significantly affect the upconversion property of Ho3+, and then design and select the key functional and structural elements of matrix and optimize the concentrations of sensitizer and activator. Consequently, some noval Ho3+ activated micro-nanocrystalline materials for good upconversion property will be developed. This will also lay a foundation for the f

英文关键词： Ho3+；Upconversion luminescence；oxide hosts；；