高效抗湿性的锰掺杂氟化物红色荧光粉的绿色合成、发光性能优化与白光LED器件

Mn4+掺杂的碱金属氟化物具有发光效率高和发射半峰宽极窄等优点，成为当前高性能LED显示背光源的核心和关键材料之一，然而，当前该材料在合成方法和化学稳定性两个方面仍存在严重不足：1、合成不绿色，反应过程中必须使用高毒性的HF溶液作为反应溶剂；2、耐湿性差和包覆效果不佳。有鉴于此，本项目拟通过具有适度配位能力的无机或有机酸替代高毒性和挥发性的HF，在溶液中稳定Mn4+离子并实现绿色合成；拟通过室温原位包覆方法，解决材料耐湿性能差和包覆效果不均匀的瓶颈；深入系统研究并揭示材料的绿色合成与水解机理，获得高抗湿性包覆方法与规律，预期将获得若干种具有自主知识产权的高效氟化物红色荧光粉，争取其发光性能达到实用化水平，为未来高效氟化物荧光粉材料设计和研发丰富并提供指导性原则；

Mn4+ ion doped fluoride red emitting phosphor has two main advantages, high quantum efficiency and the sharpest emission, which make it one of the key materials of high efficient white LEDs for backlighting display. Unfortunately, Mn4+ ion doped fluoride red emitting phosphor still has two main disadvantages: 1. Non-green synthetic route because of the use of high volatile HF solution. 2. Poor water resistance or non-uniform of coating. The two main purpose of this project are to develop green synthetic route to high efficient Mn4+ ion doped fluoride red emitting phosphor by replacing high volatile HF solution with inorganic/organic acid with suitable complexion ability and to develop in-situ and uniform coating approach at room temperature. Also the mechanisms on green synthesis and in-situ coating will be deeply studied and concluded.