新型双钙钛矿Ca_(2)GdSbO_(6):Sm^(3+)橙红色荧光粉的制备及其发光性能  

Preparation and Luminescence Properties of a Novel Double Perovskite Ca_(2)GdSbO_(6):Sm^(3+)Reddish-orange Phosphor

作　　者：李婧 许英朝 范浩爽[1] 陆逸 李莉 张贤玉 LI Jing;XU Yingchao;FAN Haoshuang;LU Yi;LI Li;ZHANG Xianyu(School of Optoelectronics and Communication Engineering,Xiamen University of Technology,Xiamen 361024,China;Fujian Provincial Key Laboratory of Optoelectronic Technology and Devices,Xiamen University of Technology,Xiamen 361024,China)

机构地区：[1]厦门理工学院光电与通信工程学院,厦门361024 [2]厦门理工学院、福建省光电技术与器件重点实验室,厦门361024

出　　处：《材料研究学报》2024年第4期288-296,共9页Chinese Journal of Materials Research

基　　金：福建省高校产学研联合创新项目(2023H6038);厦门市科技计划重大项目(3502ZCQ20191002);厦门理工学院2023年度研究生科技创新计划项目(YKJCX2023105)。

摘　　要：用高温固相法合成一种新型系列橙红色荧光粉Ca_(2)Gd_(1-x)SbO_(6):xSm^(3+)(x=0、0.01、0.02、0.03、0.04、0.05、0.06),使用X射线衍射(XRD)、扫描电子显微镜(SEM)、光致发光(PL)光谱、高温荧光光谱和荧光衰减寿命等手段表征其物相结构、晶体结构、化学纯度和光学性质,研究了材料的发光性能。结果表明,这种荧光粉基于Sm^(3+)在597 nm处的^(4)G_(5/2)→^(6)H_(7/2)跃迁,引入Sm^(3+)作为发光中心在407 nm激发下可发出波长为597 nm的橙红光。随着Sm^(3+)离子浓度的提高Ca_(2)GdSbO_(6):Sm^(3+)荧光粉的发光强度先提高后降低。根据Dexter理论,其浓度猝灭是电偶极-电偶极相互作用主导的,Sm^(3+)离子的最佳掺杂浓度为x=0.03。最佳掺杂样品的色纯度约为99.3%,色坐标为(0.6146,0.3826)。在453K这种Ca_(2)GdSbO_(6):Sm^(3+)荧光粉的发射强度只衰减5.56%,表明其具有较高的热稳定性。The compound Ca_(2)GdSbO_(6)with a stable double perovskite structure is one of the highquality materials used as a phosphor matrix.A new series of reddish-orange phosphors Ca_(2)Gd_(1-x)SbO_(6):xSm^(3+)(x=0、0.01、0.02、0.03、0.04、0.05、0.06)were synthesized by high-temperature solid-state method.The phase composition,optical properties,crystal structure and chemical purity of the prepared phosphors were characterized via X-ray diffractometer(XRD),scanning electron microscope(SEM),photoluminescence spectroscope(PL),high-temperature fluorescence spectroscope and fluorescence decay lifetime measurement.The incorporation of Sm may endow the synthesized phosphor Ca_(2)Gd_(1-x)SbO_(6):xSm^(3+)with ions Sm^(3+)as its luminescent centers with the peculiar^(4)G_(5/2)→^(6)H_(7/2)transition of Sm^(3+)at 597 nm,so that the synthesized phosphor may emit the orange-red light at 597 nm under the excitation of the light at 407 nm.As the concentration of Sm^(3+)ions increase,the luminous intensity of Ca_(2)GdSbO_(6):Sm^(3+)phosphors increases first,and then decreases.According to Dexters theory,the concentration quenching is dominated by the electric dipole-dipole interaction,and the optimum doping of Sm^(3+)ions is concentration x=0.03.The test shows that the color purity of the best-doped sample is about 99.3%,and the color coordinates are(0.6146,0.3826).The thermal stability was further studied,and it was found that the emission intensity was only attenuated by 5.56%at 453 K.The above results show that the new red-orange lightemitting Ca_(2)GdSbO_(6):Sm^(3+)phosphor is promising to be applied in the field of white LED.

关 键 词：无机非金属材料 Ca_(2)GdSbO_(6):Sm^(3+) 高温固相法 橙红色荧光粉 白光LED 高热稳定性 

分 类 号：O482.31[理学—固体物理]