项目名称： 有机给体/稀土纳米晶复合荧光材料应用于白光LED探索

项目编号： No.11304118

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 数理科学和化学

项目作者： 戴其林

作者单位： 吉林大学

项目金额： 30万元

中文摘要： 白光LED是新一代照明光源，与之相匹配的高性能荧光粉是决定LED照明的关键技术；目前传统无机LED稀土荧光粉还存在荧光粉与芯片匹配局限和色度不佳等问题。本项目提出利用有机给体和稀土纳米晶的复合解决传统LED荧光粉的不足：即通过表面有机给体的可控与高效吸收，将激发能量有效传递给稀土纳米晶荧光材料，实现高效的荧光发射。拟采用非水相法合成Y2O3:Eu3+、YPO4:Tb3+、LaPO4:Tm3+等高性能三基色稀土纳米晶材料，并以acac和azobenzene等有机配体对其进行表面钝化形成复合材料；深入研究材料中稀土纳米晶的尺寸、结构、形貌，和有机配体的分子轨道、钝化层厚度对发射与激发谱带的调控作用；研究这些因素对材料的荧光动力学过程和发光效率的影响，揭示介面配位与能量传递过程的关系；优化并获得高性能的紫外和蓝光激发LED荧光粉，封装制备出高亮度与高色度新型白光LED器件，以突破国外技术垄断。

中文关键词： 稀土纳米晶；白光LED；荧光增强；上转换；反蛋白石结构

英文摘要： The white LED is a new generation of lighting source,high-performance phosphor matched with LED is to determine the key technology of the LED lighting.The traditional inorganic LEDs rare earth phosphor still has problems such as the limitations of the matching between the phorphos and the LED chip,the poor chroma of the LED device etc.The project is proposed to solve the lack of traditional LED phosphor via organic donor and rare earth nanocrystalline composite,that is, efficient fluorescence can be realized by the energy transfer from controllable the surface organic dornor which has high efficient absorption to the rare earth nanocrystals.We intend to adopt a non-aqueous phase method to make Y2O3:Eu3+,YPO4:Tb3+,LaPO4:Tm3+.High performance tricolor rare earth nanocrystalline materials, and do the surface passivation to form nanocomposite by acac and azobenzene organic ligands.Deep study the effects of size, structure, morphology of rare earth nanocrystalline， the molecular orbitals of organic ligands and the thickness of organic passivation layer on emission and excitation bands, luminescence dynamics and the quantum yield of the emission.Reveal interface effects on the energy transfer process.Optimize and obtain high-performance UV and blue excitation LED phosphor.Package high brightness and high chroma new wh

英文关键词： rare earth nano-crystalline；white LED；fluorescence enhancement；up-conversion；inverse opal structure