Ca_(2)YNbO_(6):Sm^(3+)双钙钛矿氧化物荧光粉的制备及白光LED应用  

Preparation and White LED Applications of Ca_(2)YNbO_(6):Sm^(3+) Double Perovskite Oxide Phosphor

作　　者：麦俊贤 樊婷[1,2,3] 吕健滔 梁杰[1,2,3] 邓婷婷 MAI Jun-xian;FAN Ting;LU Jian-tao;LIANG Jie;DENG Ting-ting(School of Materials Science and Hydrogen Energy,Foshan University,Foshan 528000,China;Guangdong Key Laboratory for Hydrogen Energy Technologies,Foshan 528000,China;Foshan inorganic micro-nano luminescent materials engineering technology research center,Foshan 528000,China;School of Physics and Optoelectronic Engineering,Foshan 528225,China;Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology,Foshan 528225,China)

机构地区：[1]佛山科学技术学院材料科学与氢能学院,广东佛山528000 [2]广东省氢能技术重点实验室,广东佛山528000 [3]佛山市无机微纳米发光材料工程技术研究中心,广东佛山528000 [4]佛山科学技术学院物理与光电工程学院,广东佛山528225 [5]粤港澳智能微纳光电技术联合实验室,广东佛山528225

出　　处：《光学与光电技术》2023年第5期117-124,共8页Optics & Optoelectronic Technology

基　　金：国家自然科学基金(51702051、51902054);佛山市无机微纳米发光材料工程技术研究中心项目;广东省科技厅粤港澳联合实验室项目(2020B1212030010)资助。

摘　　要：传统的商用白光LED由于缺乏红光成分,造成显色指数较低。为了提升白光LED的显色性能,可以在荧光粉中加入Sm^(3+),以提升橙红光的发射能力。采用传统的高温固相法制备了Ca_(2)YNbO_(6):Sm^(3+)新型双钙钛矿氧化物荧光粉,并详细研究了荧光粉末的晶体结构、元素组成、发射光谱、激发光谱、热稳定性和荧光寿命等性质。研究表明,该荧光粉为纯相化合物,粒径约5μm。在408nm的激发下,Sm^(3+)在650nm附近有强烈的红光发射。数据拟合表明,荧光粉的发光属于Sm^(3+)的电偶极子-偶极子相互作用过程。高温测试表明,该氧化物荧光粉具有较高的热稳定性。将商用蓝粉、绿粉与Ca_(2)Y_(0.96)NbO_(6):0.04Sm^(3+)粉体混合,并利用365nm的InGaN芯片激发,可制备出色坐标为(0.344,0.350),色温为4989K,显色指数为81的暖白光LED。The traditional commercial white LED has low color rendering index due to the lack of red light component.In order to improve the color rendering performance of white LED,Sm^(3+)can be added to the fluorescent powder to enhance the emission ability of orange and red light.Double perovskite oxide Ca_(2)YNbO_(6):Sm^(3+) phosphors with red luminescence are prepared by traditional high temperature solid phase method.The crystal structure,elemental composition,emission spectrum,photoluminescence spectrum,thermal stability and fluorescence lifetime of the fluorescent powder are studied in detail.Results show that the phosphor is a pure compound with particle size about 5μm,Sm^(3+)has a strong red emission at 650 nm when excited at 408 nm.According to data fitting,it is shown that the luminescence of phosphor belongs to Sm^(3+)electric dipole-dipole interaction process.High temperature testing shows that the oxide fluorescent powder has high thermal stability.By mixing commercial blue and green powder with Ca_(2)Y_(0.96)NbO_(6):0.04Sm^(3+) powder and excited by 365 nm-InGaN chip,a warm white LED with color coordinate of(0.344,0.350),color temperature of 4989 K and a color rendering index of 81 is realized.

关 键 词：稀土掺杂材料 光致发光 荧光粉 红光发射 白光LED 

分 类 号：O482.31[理学—固体物理]