白光LED用特殊价态离子掺杂红色荧光体的制备、结构调控及发光性能研究

项目名称： 白光LED用特殊价态离子掺杂红色荧光体的制备、结构调控及发光性能研究

项目编号： No.11464021

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 曹人平

作者单位： 井冈山大学

项目金额： 51万元

中文摘要： 白光LED由于具有高效、长寿命和节能环保等特点，已成为未来照明发展的必然趋势。今后发展的一个方向是进一步实现价格低廉和高效的白光LED。本项目提出利用高温固相法制备成本低、发光效率高和性能稳定等的新型特殊价态离子(Mn4+、Bi2+)掺杂红色荧光粉；研究特殊价态离子(Mn4+、Bi2+)掺杂红色荧光粉的晶体结构与发光性能的关系，探索特殊价态离子(Mn4+、Bi2+)的稳定化机制和调控原理，分析离子间以及离子与基质间的能量传递规律和对发光效率的影响；通过组成和烧结温度等工艺条件的优化，实现高稳定性和高量子效率的红色荧光粉；运用光谱学和固体物理学理论，进一步揭示特殊价态离子(Mn4+、Bi2+)掺杂荧光材料的发光机理；演示基于特殊价态离子(Mn4+、Bi2+)掺杂红色荧光材料的暖白光LED。为实现性能优异、价格低廉和高效的白光LED提供理论基础。

中文关键词： 发光材料；红色荧光粉；白光LED；发光机理；发光效率

英文摘要： White LED has become the inevitable trend of the future lighting development due to high efficiency, long life, energy conservation, and environmental protection etc. It is the future development that low cost and high efficient white LED is achieved. In the project, novel special valence state ions (Mn4+ or Bi2+) doped red phosphors with low cost, high luminous efficiency, and stable performance etc are prepared by using high temperature solid state reaction method. We research the relationship between the crystal structure and luminescence properties of special valence ions (Mn4+, Bi2+) doped red phosphor, explore the stabilization mechanism and control principle of special valence ions (Mn4+, Bi2+), and analysis the effect of the energy transfer between ions and ions or the substrate on luminous efficiency. We achieve red phosphors with high stability and high quantum efficiency through the optimizing of process conditions suich as composition and sintering temperature etc, further reveal luminescence mechanism of special valence ions (Mn4+, Bi2+) doped fluorescent material by using spectroscopy and solid state physics theory. Warm white LED based on special valence ions (Mn4+, Bi2+) doped red fluorescent material is demonstrated. This project will be helpful to provide theoretical basis for white LED with excellent performance, low cost, and high efficiency.

英文关键词： Luminescent materials;Red phosphor;White LED;Luminous mechanism;Luminous efficiency