【摘要】 在还原气氛下采用高温固相反应法合成了白光LED用黄色荧光粉Y3Al5O12∶Ce(YAG∶Ce),研究了助熔剂对YAG∶Ce荧光粉发光特性的影响。XRD的测量结果表明加入合适的助熔剂有利于YAG∶Ce荧光粉的晶化,并且不引入杂相。选择BaF2和H3BO3同时使用效果要好于单独使用一种助熔剂。助熔剂的加入可增大YAG∶Ce荧光粉的激发和发射光谱强度,并能有效降低荧光粉的中心粒径(D50)控制粉体的粒径分布,适用于白光LED的制造。更多还原

【Abstract】 Y3Al5O12∶Ce (YAG∶Ce), a yellow phosphor for white LED, was synthesized by hightemperature solid state reaction under air and reducing atmosphere. The influence of flux on the luminescent properties of YAG∶Ce phosphor was investigated. The XRD spectra show that the flux can help to crytallize the phosphor, and no other phases are formed except the cubic. BaF2 and H3BO3 added together as flux are better than the flux added independently. When adding flux, the intensities of excitation and emission spectra of YAG∶Ce become much stronger, and the particle size and size distribution are suitable for the use in white LED device.更多还原