白光LED用三种典型氮掺杂铝、硅酸盐基荧光粉的制备及其发光机理研究

First, synthesis three typical aluminate, silicate-based phosphors using solid-state reaction method and soft chemistry mehtod.Then, synthesis new aluminate, silicon-based nitride multiple compounds by replacement and double replancement with nitrogen ions and suitable charge compensation ions to obtain high quantum efficiency and good thermal stability phosphors for wihte LEDs. The crystal structure will be tested by Rietveld, TEM and so on. And also we will use Rietveld, morphology and luminescent spectra results to discuss luminescent mechanism in aluminate, silicon-based nitride multiple compounds. The detailed contents will include following parts: 1. Preparation three typical aluminate, silicate-based phosphors with better performance. 2. Preparation nitrogen-doped three typical aluminate, silicate-based phosphors according to 1's synthesis experience, then investigate their luminescent property. 3. Choosing synthesized samples with better morphology and luminescent property to package white LEDs, and conducting basic research. 4. Looking for the different phenomena between none doped and nitrogen-doped aluminate, silicate-based phosphors, then try to investigate luminescent mechanism in aluminate, silicon-based nitride multiple compounds.

利用高温固相法和软化学法相结合的方法，制备氮掺杂的三类典型铝酸盐及硅酸盐基荧光粉。通过氮离子及适当的电荷补偿剂离子在母体氧化物结构中置换及双重置换，合成新氮化铝、硅基多元化合物，以期获得量子效率高、热稳定性好的白光LED用荧光粉。结合Rietveld结构精修，TEM等手段确定氮掺杂之后样品的晶体结构，并进行发光机理的研究。主要研究内容包括：1.制备性能良好的三类铝、硅酸盐基荧光粉；2.在1的合成基础上制备氮掺杂的三类铝、硅酸盐基荧光粉，并对其结构和发光性能进行表征；3.氮掺杂的铝、硅酸盐基荧光粉在LED器件中的应用及二次性能研究；4.阐明含氮化合物基发光材料的发光机理。

利用高温固相法和软化学法相结合的方法，制备氮掺杂的三类典型铝酸盐及硅酸盐基荧光粉。通过氮离子及适当的电荷补偿剂离子在母体氧化物结构中置换及双重置换，合成新氮化铝、硅基多元化合物，以期获得量子效率高，热稳定性好的白光LED 用荧光粉。结合Rietveld 结构精修，TEM 等手段确定氮掺杂之后样品的晶体结构，并进行发光机理的研究。主要研究内容包括：1.制备性能良好的三类铝、硅酸盐基荧光粉；2.在1 的合成基础上制备氮掺杂的三类铝、硅酸盐基荧光粉，并对其结构和发光性能进行表征；3.氮掺杂的铝、硅酸盐基荧光粉在LED 器件中的应用及二次性能研究；4.阐明含氮化合物基发光材料的发光机理。