新型Ce:YAG陶瓷荧光体封装白光LED的性能  

White LED packaged by novel Ce:YAG ceramic phosphor

作　　者：朱学绘[1] 范广涵[1] 王海丽[2] 沈德忠[2] 章勇[1] 

机构地区：[1]华南师范大学光电子材料与技术研究所,广州510631 [2]北京中材人工晶体研究所,北京100018

出　　处：《功能材料与器件学报》2010年第4期389-393,共5页Journal of Functional Materials and Devices

基　　金：广东省关键领域粤港合作重点突破项目(0812150300001);广东省自然科学基金资助项目(06300928,82510631);华南师范大学学生课外科研重点课题(09XXKC03)

摘　　要：利用真空烧结技术制备了一种可用于白光LED封装的Ce：YAG陶瓷荧光体。用X射线衍射仪、光致发光激发谱、光致发光谱等测试手段对这种陶瓷荧光体进行表征。结果表明：陶瓷荧光体的主相为Y3A l5O12,该荧光体可以很好的被470 nm蓝光激发,发射出550 nm的黄光。该陶瓷荧光体封装蓝光芯片所得的白光LED器件在110℃的高温下老化600小时,光衰只有10%,色坐标无变化,证明其寿命及稳定性远远好于采用传统方式封装的白光LED。研究结果表明,该Ce：YAG陶瓷荧光体是一种非常适合大功率白光LED封装的荧光材料。A novel Ce：YAG ceramic phosphor was prepared by vacuum sintering technique.The ceramic phosphor was characterized by the X-ray diffraction,photoluminescence excitiation spectra and photoluminescence spectra.It has been showed that the ceramic phosphor a main Y3Al5O12 phase,and the yellow emission,around 550 nm in wavelength,was observed from the ceramic phosphor under the excitement of 470 nm.A white LED which packaged by this Ce：YAG ceramic phosphor with a 470 nm-emitting blue chip showed only 10% degradation of relative intensity of luminous efficacy and no change of the color coordinate after high temperature aging at 110℃ for 600 hours,which showed better performance in stability and lifetime than packaged by traditional ways at the same condition.The results indicated that the ceramic phosphor is a very suitable material for power white LED packaging.

关 键 词：LED 陶瓷荧光体 封装 老化 

分 类 号：TN383[电子电信—物理电子学]