SiO_2-YAG:Ce^(3+)玻璃荧光体的制备及其白光LED的封装  

SiO_2-YAG:Ce^(3+)GLASS PHOSPHOR PREPARED FOR WHITE LED PACKAGING

作　　者：朱学绘[1] 范广涵[1] 何安和[1] 陈献文[1] 何苗[1] 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,广东广州510631

出　　处：《华南师范大学学报（自然科学版）》2010年第1期62-66,共5页Journal of South China Normal University(Natural Science Edition)

基　　金：广东省关键领域粤港合作重点突破资助项目(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资助项目(09XXKC03)

摘　　要：采用溶胶-凝胶工艺,以正硅酸乙酯(TEOS)和乙烯基三乙氧基硅烷(VTES)为硅源,以VTES中的乙烯基(CHCH2)为有机改性剂,反应过程中掺入YAG:Ce3+荧光粉,制备出有机改性的SiO2-YAG:Ce3+玻璃荧光体.用X射线衍射仪、光致发光激发谱、光致发光谱和傅里叶红外光谱等测试手段对这种玻璃荧光体进行表征.结果表明:玻璃荧光体主相为Y3Al5O12,该荧光体可以很好地被460nm蓝光激发,发射出550nm的黄光.该玻璃荧光体封装蓝光芯片所得的白光LED器件具有良好的显色性、光通量、流明效率和光强分布.研究结果表明,SiO2-YAG:Ce3+玻璃荧光体是一种潜在的白光LED封装用荧光材料.The vinyltriethoxysilane（VTES） modified SiO2-YAG：Ce3＋ glass phosphor was successfully prepared by sol-gel method.The glass phosphor was characterized by X-ray diffraction（XRD）,photoluminescence spectra（PL）,photoluminescence excitation spectra（PLE） and infrared absorption（IR） spectra.It showed that the glass phosphor has a main Y3Al5O12 phase,and the yellow emission around 550 nm in wavelength was observed under the excitement of 460 nm.A white light emitting diode（WLED） packaged by this SiO2-YAG：Ce3＋ glass phosphor with a 460 nm-emitting blue chip showed better performance in color render index（CRI）,luminous flux and luminous efficiency than which packaged by the traditional way at the same condition.The results indicated that the organic modified SiO2-YAG：Ce3＋ glass phosphor is a potential material for WLED packaging application.

关 键 词：溶胶-凝胶 白光LED 荧光体 封装 

分 类 号：O463.1[机械工程—光学工程]