复合基团单相白光荧光粉的双温区Al还原制备及光谱调控

项目名称： 复合基团单相白光荧光粉的双温区Al还原制备及光谱调控

项目编号： No.51472162

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： 房永征

作者单位： 上海应用技术大学

项目金额： 83万元

中文摘要： 单相白光发射荧光粉因其稳定的发光性能成为面向大功率白光LED应用的较优的发光材料。荧光粉基质材料的设计一直是开发优质荧光粉关键。本项目拟使用复合基团概念进行单相白光发射荧光粉的设计与合成，通过基团间的协同效应改善荧光粉的发光性能，并深入研究复合基团对于基质材料晶体场环境构建的影响及基团间协同效应的内在机理。与传统荧光粉的碳热还原法和氮氢还原法不同，本课题在优选复合基团单相白光荧光粉基质的基础上，采用双温区Al还原法对荧光粉进行原位还原，既能避免类似于碳热还原时产生还原剂污染的问题，也能在广泛的温度区间实现还原反应。通过控制还原程度使荧光粉的发光中心处于混合价态，以实现对荧光粉的光谱调控并混色发出白光。本项目将着重深入研究Al还原条件下发光中心的价态以及基团间的协同效应等科学问题。项目的实现将为大功率LED用单相白光发射荧光粉设计开发及荧光粉的光谱调控提供新的思路及科学依据。

中文关键词： 大功率LED；荧光粉；白光发射；Al；还原法；复合基团

英文摘要： The uses of single-phased white-light-emitting phosphors provide an optimum solution for the realization of high-power light-emitting didoes (LED) due to their stable photoluminescence properties. In this project, co-host design concept will be used to design and exploring novel and high photoluminescence performance phosphors. Their photoluminescence prosperities will be improved through the synergistic effect among the composed groups. Furthermore, the crystal building process as well as the group synergistic effect mechanism will be investigated and expounded. Novel and effective aluminum reduction method will be simultaneously used for the phosphors preparation. Different from the traditional reduction methods (Carbon thermal reduction or H2/N2 reduction method), aluminum reduction method allowed us achieving the reduction reaction in a wide and effective temperature range, and at the same time avoiding the pollution problems as in the carbon thermal reduction. By controlling the reductive level, the emission centers can be coexisted in a mixed valence state, spectra control will be thereby achieved and a white light emitting will be finally obtained. The coexisting valence state of different the emission centers and the group synergistic effect in the phosphors prepared by the aluminum reduction method will be investigated in detail in this project. The achievements of this project will provide a new method for phosphors spectra control, and also bring us new inspire to design excellent phosphors for high-power LED application.

英文关键词： High power LED;Phosphor;White light emitting;Aluminum-reduction method;Co-host