三基色量子点嵌入光子晶体的构筑及其高效白光薄膜的研究

In this project, photonic crystal structures and trichromatic quantum dots will be combined closely by taking advantages of enhanced fluorescence based on photonic crystals and features of quantum dots, in aim to solve the current problem of white light source that low luminous efficiency and color stability. The method of quantum dots embedded in nanoparticles will be designed and optimized, also, the influence of various reaction conditions on material preparation will be analyzed. At the same time, high quality photonic crystal films from fluorescent nanoparticles will be assembled by selecting the suitable way, then the effect of different assembled methods and conditions on quality and optical performance of photonic crystal films will be studied. During the research, the relationship between microstructure of photonic crystal films and optical property will be explored to realize the manipulation of optical signal by designing the specific stopbands of photonic crystal films, and the effect of photonic crystal structures on white light source will be systematically investigated. Based on test results and theoretical analysis for optical properties, we will reveal the deep relationship between optical properties of materials and microstructures in order to feedback and guide the design of research system. The objective is to establish a comprehensive and integrated research with synthesis of fluorescent nanoparticles, microstructure and optical property, which will provide the material and theoretical basis for improving the performance of solid state white light devices.

本项目拟将光子晶体结构和三基色量子点紧密结合起来，充分利用基于光子晶体增强荧光的优势和量子点性质优异的特点，解决目前白光光源发光效率低和显色稳定性能差的问题。设计并优化量子点在纳米颗粒的固定方法，分析各种反应条件对材料制备的影响；选择合适的组装方式将荧光纳米颗粒制备高质量光子晶体薄膜，研究不同组装方法和条件对光子晶体薄膜质量和光学性能的影响；探索光子晶体薄膜的微观结构与宏观光学性质之间的对应关系，设计、制备具有特定带隙的光子晶体薄膜以实现光子带隙对光学信号的有效调控，并系统考察光子晶体结构对白光光源的影响。基于材料光学性能的测试结果和理论分析相结合，对材料光学性质与光子晶体微结构的关系进行系统而深入的研究，进而反馈指导研究体系设计，开展荧光纳米颗粒的制备-微结构-光学特性一体化研究，为提高固态白光器件性能提供新材料及理论依据。

本项目将光子晶体结构和三基色荧光材料紧密结合起来，充分利用基于光子晶体增强荧光的优势和量子点性质优异的特点，解决目前白光光源发光效率低和显色稳定性能差的问题。以三基色荧光材料为发光单元，单分散微球为基本组成单元，首先构建荧光材料嵌入到光子晶体的位置，探讨不同嵌入方式对荧光微球单分散性的影响及荧光调控行为；选取三色荧光染料通过荧光共振能量转移复合得到白光光源，由于选择与红光发射相匹配的特定光子带隙的光子晶体，基底可以选择性增强红光组分，从而弥补白光中红光发射的不足的缺陷，可引申到以光子晶体作为基底直接提高发光器件中发光性能不佳材料的强度；进行了光子晶体的特定带隙同时提高红、绿、蓝三基色发光强度的研究，通过对三基色量子点以及光子晶体的结构与性能关系进行系统研究，制备具有特定带隙的光子晶体薄膜以实现光子带隙对光学信号的有效调控，总结其本征关系和规律；开展了三带隙异质结构光子晶体对红、绿、蓝三基色量子点发光性能影响的研究，建立光子晶体薄膜的微观结构与宏观光学性质之间的对应关系，并系统考察光子晶体结构对白光光源的影响，为提高固态白光器件性能提供新材料及理论依据。项目共发表论文11篇，其中SCI收录论文5篇；申请发明专利8项，其中授权2项；协助指导硕士生3 名，培养大专生6 名。