离子取代与晶格调控对YAG:Ce3+荧光粉发光性质的影响

项目名称： 离子取代与晶格调控对YAG:Ce3+荧光粉发光性质的影响

项目编号： No.51472234

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： 尚蒙蒙

作者单位： 中国科学院长春应用化学研究所

项目金额： 83万元

中文摘要： 白光LED因具有高效、节能、环保等优点，成为当前照明领域的研究热点。其中荧光粉对白光LED器件的性能如发光效率，显色指数等有很大影响,所以荧光粉性能的优劣对白光LED技术的发展起着关键作用。本项目针对传统黄色YAG:Ce3+荧光粉显色性较低及硅基氮氧化物难以合成等问题，采用临近离子取代与常压低温氮化的技术手段调节YAG的结构组份，得到同时具备石榴石结构，且颗粒尺寸分布均匀的系列固溶体相(Y3Al5-2xMgx(Si/Ge)xO12:Ce3+,Y3Al5-zSizO12-zNz:Ce3+,Y3-nMnAl2Al3-nSinO12:Ce3+,M = Mg2+/Ca2+/Sr2+/Mn2+, 0≤x≤2, 0≤z≤0.5, 0≤n≤3)荧光粉，研究离子取代，结构改变特别是微结构的改变对Ce3+离子发光性质的影响，阐明结构相关的发光机理；并开展在白光LED器件应用中的研究工作。

中文关键词： 白光LED；发光材料；晶体结构调控；发光机理；微观结构

英文摘要： Compared with tranditional incandescent lamp and fluorescent lamp, white light-emitting diodes (WLEDs) have greatly promising application in the field of lighting and display due to their advantages such as high efficiency, energy conservation, environmental protection. As the luminescence materials have a great influence on the device performance of WLEDs, such as the luminous efficiency, color rendering index, and thermal stability,the luminescent performance of phosphors plays a key role on the development of WLEDs. Aiming at the problems of low color rendering index of commercial YAG:Ce3+ and the difficulty to synthesize oxynitride, this project will try to synthesize a series of solid-solution phosphors (Y3Al5-2xMgx(Si/Ge)xO12:Ce3+, Y3Al5-zSizO12-zNz:Ce3+, Y3-nMnAl2Al3-nSinO12:Ce3+, where M represents Mg2+, Ca2+, Sr2+ or Mn2+,0≤x≤2, 0≤z≤0.5, 0≤n≤3) with garnet structure by neighboring-ion site substitution and nitriding under normal pressure. Moreover, the influence of the ion substitution and crystal structure variation, especially the variation of microstructure on the photoluminescence properties of Ce3+ will be investigated in depth, and the luminescent mechanisms related with crystal structure will be proposed in this project. The research work for the corresponding application in WLEDs device would be carried out.

英文关键词： White LED;Luminescence material;Crystal structure regulation;Luminescence mechanism;Microstructure