高稳定性高亮度卤化亚铜类螯合型无机-有机杂化荧光分子团簇的构筑及其性能研究

Phosphors are the key component for new energy-saving lighting devices. Nowadays, nearly all of the commercial phosphors contain rare-earth elements (REEs). Developing REE free lighting phosphors is an effective way to protect resources and environment, which has important strategic significance to our country. The inorganic-organic hybrid semiconductor materials could be developed as REE free alternatives for commercial lighting phosphors. At present, the bottleneck problem in this research area is that the hybrid phosphors has low efficiency and poor stability, which hinders their practical applications. Aiming at developing highly efficient inorganic-organic hybrid phosphors, the project propose to fabricate highly luminescent and stable copper halide based chelating inorganic-organic hybrid molecular clusters, by using the high stability structural characteristic of chelates as reference. The structural and physical characterizations, spectrum analyses, together with Density Functional Theory calculations and luminescence mechanism study will be carried out to determine the correlations between the structures of these materials and their lighting performance and stability. The chelating effect towards their performance as phosphors will be understood, and the scheme for optimizing their performance will be summarized. High-performance hybrid lighting phosphors could be obtained by adjusting and optimizing the structure and physical parameters of the chelating clusters. This project will provide a new strategy for the performance optimization of inorganic-organic hybrid materials.

荧光粉是新型节能照明器件中重要组成部分。现今商业化荧光粉中普遍含有稀土金属元素，开发不含稀土金属的荧光粉材料是对资源和环境的一种有效保护，对于我国具有重要的战略意义。无机-有机杂化半导体材料在凭借其优良的光电性能，有望发展成为商业化荧光粉的无稀土金属的替代品。目前这一研究遇到的瓶颈问题是杂化荧光粉的发光效能低且稳定性差而无法实际应用。本项目以开发高效无机-有机杂化荧光粉材料为目标，借鉴螯合物高稳定性的结构特点，构筑兼具高稳定性和高亮度的卤化亚铜类螯合型无机-有机杂化荧光分子团簇。结合结构测定、物性表征、谱学分析、密度泛函理论计算和发光机理研究，探讨这类材料的结构同光学性能和稳定性之间的构效关系，阐明螯合作用对材料荧光粉性能的影响机制，总结出材料性能优化方案。通过调变和优化材料的结构和物性参数，获得高性能杂化荧光粉材料。本项目研究将为无机-有机杂化材料的改性研究提供一个全新的思路。

申请人以开发高性能有机-无机杂化发光材料为目标，以卤化亚铜基有机-无机杂化材料为主要研究对象，通过对其结构进行调控，对杂化材料进行优化改性；理论与实验相结合，阐明杂化材料的构效关系，开发出多种优化材料的性能的手段。同时基于解决杂化荧光材料在节能照明领域应用的瓶颈和难点问题，通过调变无机组分和有机组分的组成与结构，弥补杂化荧光材料性能的缺陷，增加其功能，使其满足实际应用的需要。