LSPR半导体-稀土掺杂氟化物纳米复合材料的可控制备与上转换发光增强的研究

项目名称： LSPR半导体-稀土掺杂氟化物纳米复合材料的可控制备与上转换发光增强的研究

项目编号： No.51472242

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 一般工业技术

项目作者： 王元生

作者单位： 中国科学院福建物质结构研究所

项目金额： 83万元

中文摘要： 用局域表面等离子体共振（LSPR）效应增强近红外激发的稀土上转换发光是近年来的一个研究热点，应用前景广阔。迄今常用的LSPR源是贵金属纳米材料，但其易带来较强的光散射和再吸收等负作用，且价格昂贵。为此，本项目拟研究用氧族半导体代替贵金属做LSPR源，构建LSPR半导体-稀土掺杂氟化物核-壳纳米复合结构，利用半导体在近红外区的LSPR效应增大氟化物中稀土离子对激发光的吸收截面，进而增强近红外激发的上转换发光。研究液相反应体系中半导体-稀土掺杂氟化物核-壳结构的形成机理与可控制备，以及半导体LSPR特性影响稀土发光的动力学过程和微观机理，建立纳米复合结构-半导体LSPR效应-稀土发光性能之间的关系；在此基础上，通过对纳米复合结构进行调控，优化上转换发光性能。本项目的实施将进一步丰富纳米功能材料合成化学、半导体光电子学和稀土发光物理学，为发展性能优异、成本低廉的新型发光材料奠定基础。

中文关键词： LSPR半导体；上转换发光；稀土掺杂；纳米复合材料；氟化物纳米晶

英文摘要： In recent years, using localized surface plasmon resonance（LSPR）effect to enhance the near-infrared excited upconversion luminescence of the rare earth ions have been extensively investigated inspired by their wide potential applications. To date, the mostly used LSPR sources in this aspect are noble metal nanomaterials, but they often induce serious negative effects such as light scattering and re-absorption. To solve these problems, it is necessary to develope new LSPR materials to substitute the noble metals. Aiming this target,this project intends to fabricate and study nanocomposites consisting of the LSPR semiconductor and the rare earth (RE) ions doped fluoride, taking advantage of semiconductor's surface plasmon resonance effect in near-infrared region to enhance the excitation cross section, and therefore the upconversion intensity, of the RE ions. The influence and the related micro-mechanism of the LSPR effect on the RE emissions will be revealed; the relationship between the structure of nanocomposite and the luminescence behavior of RE ions will be established. By modifying the components and microstructures of the nanocomposites, the near-infrared light excited upconversion performance of the RE ions will be improved and optimized. The implementation of this project is expected to result in further enrichment of the synthesis chemistry for functional nanomaterials,the semiconductor photoelectronics, as well as the luminescent physics for the rare earth ions, and lay the foundation for developing novel upconversion materials with excellent properties.

英文关键词： LSPR semiconductor;upconversion luminescence;rare earth doping;nano-composite materials;fluoride nanocrystals