摘要
采用溶胶凝胶法合成了荧光粉CaMoO 4∶Ho 3+。借助X射线粉末衍射仪、荧光光谱仪进行表征并利用Rietveld方法对其结构进行精修。研究了Ho 3+的掺杂量对其光谱性质的影响并计算了CaMoO 4∶Ho 3+的色坐标。结果表明:Ho 3+最佳掺杂量为2%(摩尔分数),浓度猝灭机理为电偶极-电偶极相互作用。该系列荧光粉的色坐标范围为x=(0.2987~0.3177),y=(0.6644~0.6897),属于绿色发光区域。CaMoO 4∶Ho 3+荧光粉在450 nm处可被有效激发,是一种有潜在价值的白光LED用绿色荧光粉。
CaMoO4∶Ho^3+phosphors were synthesized by sol-gel method.The samples were characterized by X-ray powder diffractometer,fluorescence spectrometer and were refined by Rietveld method.The effects of the concentration of Ho^3+on the luminescence properties were studied and the color coordinates of CaMoO4∶Ho^3+were calculated.The results show that the optimal concentration of Ho^3+is 2%(mole fraction).The concentration quenching mechanism is verified to be electric dipole-electric dipole interaction.The color coordinates range of phosphors of this series:x is 0.2987 to 0.3177,and y is 0.6644 to 0.6897,which belongs to green light-emitting area.CaMoO 4∶Ho^3+could be efficiently excited by 450 nm,which is a potential green phosphor for white LED.
作者
林莹
刘梦丽
庄乃锋
LIN Ying;LIU Mengli;ZHUANG Naifeng(Department of Safety Technology and Environmental Engineering,Fujian Chuanzheng Communications College,Fuzhou 350007,China;Institute of Optical Crystalline Materials,College of Chemistry,Fuzhou University,Fuzhou 350108,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2020年第9期1614-1619,共6页
Journal of Synthetic Crystals
基金
福建省中青年教师教育科研项目(JA13378)
福州市科技计划项目(2019-G-35)。
