人工晶体学报2024，Vol.53Issue(1)：90-96,7.
NaCa2Mg2(VO4)3∶Eu3+颜色可调荧光粉的熔盐法合成及其发光性能研究
Molten Salt Synthesis of Color Tunable NaCa2Mg2(VO4)3∶Eu3+Phosphors and Their Luminescent Properties
摘要
Abstract
A series of color tunable NaCa2-xMg2(VO4)3∶xEu3+(0≤x≤0.10)phosphors were synthesized by molten salt method using cheap NaCl as molten salt.The effects of synthesis conditions and Eu3+doping on the structure and luminescence properties of the samples were investigated in details.The results show that the optimum reaction conditions for the synthesis of NaCa2Mg2(VO4)3 are reaction temperature of 800℃,reaction time of 0.5 h and mass ratio of raw material to molten salt of 1∶3.The obtained samples are NaCa2 Mg2(VO4)3 pure phase with higher crystallinity.The micromorphology of the samples changed from coral-like to smooth irregular polyhedron with the increase of temperature.Eu3+doping has little effect on the crystal structure of NaCa2 Mg2(VO4)3,but great effect on its luminescence properties.With the increase of Eu3+concentration(x),the characteristic emission band intensity of VO4 gradually decreases,while the characteristic emission peak intensity of Eu3+first increases and then decreases,reaching the maximum when x=0.06.Therefore,the luminous color of the samples can be modulated by changing the Eu3+concentration,from green to yellow-green,yellow,yellow-white and orange-red.According to the fluorescence spectrum and fluorescence lifetime analysis,it is confirmed that the energy transfer process of VO43-to Eu3+exists in NaCa2 Mg2(VO4)3∶Eu3+phosphors,and the energy transfer efficiency is about 23％.The thermal stability analysis shows that when the temperature increases from room temperature(298.15 K)to 398.15 K,the retaining ratio of the main emission peak intensity of NaCa2Mg1.94(VO4)3∶0.06Eu3+phosphor at 614 nm is 68.4％,showing its good thermal stability.关键词
钒酸盐/熔盐法/发光性能/白光LED/颜色可调荧光粉/铕离子掺杂Key words
vanadate/molten salt method/luminescent property/white LED/color tunable phosphor/Eu3+doping分类
化学化工引用本文复制引用
陈金润,陈梦玉,李子璇,李微,楚楚,曹秀哲,翟永清..NaCa2Mg2(VO4)3∶Eu3+颜色可调荧光粉的熔盐法合成及其发光性能研究[J].人工晶体学报,2024,53(1):90-96,7.基金项目
国家自然科学基金(21804030) （21804030）
河北省自然科学基金(B2020201082) （B2020201082）
河北大学实验室开放项目基金(sy202250) （sy202250）
