PC/YAG∶Ce荧光树脂的制备及光谱分析  

Preparation and Luminescent Properties of PC/YAG∶Ce Fluorescent Resin

作　　者：肖瑶[1] 范广涵[1] 皮辉[1] 许毅钦 郑树文[1] 陈志武[1] 贺龙飞[1] 张力[1] 张涛[1] 

机构地区：[1]华南师范大学光电子材料与技术研究所微纳米光子功能材料与器件重点实验室,广东广州510631 [2]广东工业技术研究院,广东广州510650

出　　处：《发光学报》2013年第11期1419-1423,共5页Chinese Journal of Luminescence

基　　金：国家自然科学基金重点项目(61176043);广东省战略性新兴产业专项资金LED产业项目(2010A081002005;2011A081301003;2012A080304016);华南师范大学研究生科研创新基金(2012kyjj223);华南师范大学青年教师培育基金(2012KJ018)资助项目

摘　　要：采用熔融共混法和高温压模法制备出PC/YAG∶Ce荧光树脂片,样品经减薄和抛光处理后,通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)、光致发光(PL)、透射光谱等测试手段进行分析。厚度为0.87 mm的样品在500~800 nm范围内的透过率约为65%。样品主相为Y3Al5O12,在342 nm和448 nm有两个激发峰。样品的发射光谱在532 nm有一宽峰,属于Ce3+的5d→4f特征跃迁发射。荧光树脂片中荧光粉含量越高,样品发射强度越大,是一种适合用于白光LED封装的新型荧光材料。PC /YAG∶ Ce fluorescent resin pieces were prepared by using the methods of compoundmelting and high-temperature molding. The transmittance of the YAG∶ Ce / PC fluorescent resin in500 ~ 800 nm reaches approximately 65%( 0. 87 mm thick,double sides polished). The fluorescent resin was characterized by XRD,SEM and PL. The X-ray diffraction( XRD) patterns indicate that the fluorescent resin was pure Y3Al5O12phase. The scanning electron microscopy( SEM) images show that YAG phosphor is distributed evenly in the fluorescent resin. The excitation spectra had a weak peak at 342 nm and a strong band at 448 nm. The broad emission peaks at about 532 nm can be attributed to 5d→4f transition of Ce3 +ions. The higher the content of fluorescent powder is,the stronger the luminesence intensity of the samples will be. All results show that YAG∶ Ce / PC fluorescent resin may be a promising fluorescent material for white LEDs.

关 键 词：白光LED 荧光树脂 YAG∶Ce 聚碳酸酯 

分 类 号：O482.31[理学—固体物理]