白光LED用YAG:Ce的研制
Development of Ce-doped YAG phosphors for white lighting LED
摘要
摘要本论文主要采用固相法制备铈离子掺杂的钇铝石榴石（YAG:Ce）荧光粉，系统探讨原材料、助熔剂及离子取代对荧光粉性能的影响，并对液相法制备荧光粉进行初步探讨。实验中首先探讨Al(OH)3和Al2O3两种不同原料对荧光粉性能的影响，在一定温度下制备含助熔剂和不含助熔剂的荧光粉，发现两种原料制备的样品在晶体结构、微观形貌和荧光性能上没有明显差别，考虑到实际生产效率，选用Al2O3作为原料之一；接着比较CeO2、Ce(NO3)3·6H2O和Ce2(CO3)3·5H2O三种不同原料对荧光粉性能的影响，实验发现，CeO2为原料时，容易获得YAG纯相，荧光性能较优；之后针对液相法制备前驱体的反应活性对荧... Abstract The solid state method was applied to obtain cerium doped yttrium aluminum garnet (YAG:Ce) phosphors. The effect of reagents, fluxes and ion substitutions were systematically discussed. Meanwhile, several kinds of wet-chemical techniques were also explored as pilot study, including co-precipitation method and hydrothermal synthesis. The luminescent properties of the phosphors, prep...