橙红色荧光粉Ca_(2)GdNbO_(6)∶Sm^(3+),Na^(+)的制备及发光性能  

Preparation and Luminescent Properties of Orange-Red Phosphors Ca_(2)GdNbO_(6)∶Sm^(3+),Na^(+)

作　　者：张鑫 崔瑞瑞 袁高峰 邓朝勇 ZHANG Xin;CUI Ruirui;YUAN Gaofeng;DENG Chaoyong(Key Laboratory of Electronic Composites of Guizhou Province, College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, China)

机构地区：[1]贵州大学大数据与信息工程学院,贵州省电子功能复合材料特色重点实验室,贵阳550025

出　　处：《人工晶体学报》2021年第12期2262-2268,共7页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51762010)。

摘　　要：为了研究Na^(+)掺杂对Ca_(2)GdNbO_(6)∶0.03Sm^(3+)荧光粉发光性能的影响,本文采用高温固相反应法成功制备了一系列Ca_(2)GdNbO_(6)∶0.03Sm^(3+),xNa^(+)(x=0.01、0.03、0.05、0.07、0.10;x为摩尔分数)荧光粉。XRD图谱和精修结果表明,Na^(+)成功掺入Ca_(2)GdNbO_(6)∶0.03Sm^(3+)晶格。发光性能测试结果表明,Na^(+)的掺入提高了Ca_(2)GdNbO_(6)∶0.03Sm^(3+)荧光粉的发光强度,其最佳掺杂浓度为5%。在406 nm波长激发下,荧光粉在602 nm(^(4)G_(5/2)→^(6)H_(7/2))处发射峰最强且发射出橙红光。浓度猝灭结果及热稳定性研究表明,Ca_(2)GdNbO_(6)∶0.03Sm^(3+),0.05Na^(+)基质中能量传递主要发生在最近邻离子之间,荧光粉的热猝灭激活能为0.119 eV。该荧光粉的色坐标位于橙红色区域(0.5935,0.4047),与国际照明委员会规定的标准色坐标(0.666,0.333)接近,表明Ca_(2)GdNbO_(6)∶0.03Sm^(3+),xNa^(+)荧光粉在白光LED领域具有潜在的应用前景。In order to study the effect of Na^(+)doping on the luminescence of Ca_(2)GdNbO_(6)∶0.03Sm^(3+)phosphors,a series of Ca_(2)GdNbO_(6)∶0.03Sm^(3+),xNa^(+)(x=0.01,0.03,0.05,0.07,0.10;x is mole fraction)phosphors were successfully synthesized by high-temperature solid-state reaction.XRD patterns and the corresponding refinement results show that Na^(+)were successfully doped into Ca_(2)GdNbO_(6)∶0.03Sm^(3+)lattices.The luminescent properties of Ca_(2)GdNbO_(6)∶0.03Sm^(3+),xNa^(+)phosphors illustrate that the introduction of Na^(+)effectively improves the luminous intensity of Ca_(2)GdNbO_(6)∶0.03Sm^(3+)phosphors.Under the 406 nm excitation,the optimum doped concentration of Na^(+)is 5%,as well as the phosphors emit orange-red light with the strongest emission peak at 602 nm(^(4)G_(5/2)→^(6)H_(7/2)).The calculation of the concentration quenching and the thermal stability of Ca_(2)GdNbO_(6)∶0.03Sm^(3+),0.05 Na^(+)host show that the energy transfer in the matrix occurs mainly among the nearest neighbor ions,and the thermal activation energy is 0.119 eV.The calculated color coordinate(0.5935,0.4047)of the phosphors is located in the orange-red region,which is close to the standard(0.666,0.333)specified by the international commission on illumination,indicating Ca_(2)GdNbO_(6)∶0.03Sm^(3+),xNa^(+)phosphors have potential application prospects in the field of white LEDs.

关 键 词：橙红色荧光粉 Ca_(2)GdNbO_(6)∶0.03Sm^(3+) xNa^(+) 高温固相反应 发光性能 热稳定性 白光LED 

分 类 号：TQ422[化学工程] TN312.8[电子电信—物理电子学]