Synthesis and photoluminescence properties of novel red-emitting Ca14Mg2（SiO4）8:Eu3+/Sm3+ phosphors
来源期刊：JOURNAL OF RARE EARTHS2015年第8期
论文作者：孙文芝 庞然 李海锋 贾永雷 张粟 姜丽宏 李成宇
文章页码：814 - 819
摘 要：Novel red-emitting Eu3+, Sm3+ singly doped and co-doped Ca14Mg2（SiO 4）8 phosphors were prepared by conventional solidstate reaction. Powder X-ray diffraction patterns were employed to confirm phase purity. Ca14Mg2（SiO 4）8:Eu3+ phosphors exhibited intense red emission under 394 nm excitation and Ca14Mg2（SiO 4）8:Sm3+ phosphors, excited at 405 nm, also showed strong red emitting at 602 nm. The concentration quenching mechanism of Ca14Mg2（SiO 4）8:Eu3+ was dipole-dipole interaction, while that of Ca14Mg2（SiO 4）8:Sm3+ was energy migration among nearest neighbor ions. The results indicated that Ca14Mg2（SiO 4）8:Eu3+ and Ca314Mg2（SiO 4）8:Sm+ were promising red-emitting phosphors for WLEDs. Meanwhile, the effect of co-doping Sm3+ ions on photoluminescence properties of Ca14Mg2（SiO 4）8:Eu3+ was studied and energy transfer from Sm3+ to Eu3+ was discovered in Eu3+, Sm3+ co-doped phosphors.
孙文芝1,2，庞然1，李海锋1,2，贾永雷1,2，张粟1，姜丽宏1，李成宇1
1. State key Laboratory of Rare Earth Resource Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences2. University of Chinese Academy of Sciences
摘 要：Novel red-emitting Eu3+, Sm3+ singly doped and co-doped Ca14Mg2（SiO 4）8 phosphors were prepared by conventional solidstate reaction. Powder X-ray diffraction patterns were employed to confirm phase purity. Ca14Mg2（SiO 4）8:Eu3+ phosphors exhibited intense red emission under 394 nm excitation and Ca14Mg2（SiO 4）8:Sm3+ phosphors, excited at 405 nm, also showed strong red emitting at 602 nm. The concentration quenching mechanism of Ca14Mg2（SiO 4）8:Eu3+ was dipole-dipole interaction, while that of Ca14Mg2（SiO 4）8:Sm3+ was energy migration among nearest neighbor ions. The results indicated that Ca14Mg2（SiO 4）8:Eu3+ and Ca314Mg2（SiO 4）8:Sm+ were promising red-emitting phosphors for WLEDs. Meanwhile, the effect of co-doping Sm3+ ions on photoluminescence properties of Ca14Mg2（SiO 4）8:Eu3+ was studied and energy transfer from Sm3+ to Eu3+ was discovered in Eu3+, Sm3+ co-doped phosphors.
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