摘要
本文使用高温固相法,制备钼酸盐作为基质的荧光粉样品Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+),对荧光粉样品进行XRD和荧光光谱光学性能进行测定。研究结果表明,在900℃高温烧结8 h得到样品Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)。以615 nm作为监测波长,在330~540 nm处的激发峰中,394 nm、464 nm处的峰群中分别属于Eu 3+的7F 0→5D 6、7F 0→5D 2跃迁。在394 nm和464 nm激发下Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)的发射光谱中,其主峰处于615 nm,是Eu 3+通过5D 0→7F 2能级跃迁红光发射形成的。计算出CIE色坐标,并与美国国家电视标准委员会的标准值(x=0.670,y=0.330)进行对比,得出样品性能的优劣程度。综上所述,Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)是一种性能很好的红色荧光粉,可以应用于白光LED领域中。
Molybdate-based phosphor sample Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)was prepared by high-temperature solid-phase method.The phosphor samples were investigated by XRD and fluorescence spectra.The sample Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)was sintered at 900℃for 8 h.With 615 nm as the monitoring wavelength,in the excitation peak at 330-540 nm,the peak groups at 394 nm and 464 nm belong to Eu 3+transitions of 7F 0→5D 6 and 7F 0→5D 2,respectively.Under the excitation of 394 nm and 464 nm,the main peak in the emission spectrum of Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)is located at 615 nm,which is the Eu 3+transition of 5D 0→7F 2 energy level.The calculated CIE(Commission International del,Eclairage)color coordinates formed by the red light emission,close to the standard values(x=0.670,y=0.330)of the National Television System Committee.In summary,Sr 0.7 Ca 0.16 MoO 4∶0.07Eu 3+0.07A+(A=Na+,K+,Li+)is a red phosphor with good performance and can be used in white LEDs.
作者
郭屹坚
吴冬妮
GUO Yijian;WU Dongni(College of Physics and Electronic Science,Guizhou Normal University,Guiyang 550025,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2020年第9期1620-1624,共5页
Journal of Synthetic Crystals
基金
贵州师范大学资助博士科研项目(GZNUD[2018]14)
贵州省大学生创新创业训练计划科研项目(20180153)
贵州师范大学2018年“大学生科研训练计划”(DK2018A22)。
关键词
荧光粉
高温固相法
稀土元素
白光LED
发光性能
phosphor
high temperature solid phase method
rare earth element
white LED
luminous property
