Luminescence behavior of Eu~(3+) in CaSiO_3:Eu~(3+)(Bi~(3+)) and Sr_2SiO_4:Eu~(3+)(Bi~(3+))

Jinghai Yang; Lili Yang; Wenyan Liu

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Luminescence behavior of Eu~(3+) in CaSiO_3:Eu~(3+)(Bi~(3+)) and Sr_2SiO_4:Eu~(3+)(Bi~(3+))

机译：Eu〜（3+）在CaSiO_3：Eu〜（3 +）（Bi〜（3+））和Sr_2SiO_4：Eu〜（3 +）（Bi〜（3+））中的发光行为

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CaSiO_3 :Eu_(0.08)~(3+)Bi_(0.002)~(3+) and Sr_2SiO_4:Eu_(0.08)~(3+)Bi_(0.002)~(3+) were synthesized by the sol-gel method, and their structure and luminescence characteristics were investigated. The XRD results showed that the symmetry of Sr_2SiO_4 :Eu_(0.08)~(3+)Bi_(0.002)~(3+) structure, which is similar to the non-close-packing orthogonal structure of K_2SiO_4 is higher than that of CaSiO_3:Eu_(0.08)~(3+)Bi_(0.002)~(3+) perovskite structure belonging to the monoclinic system. From the excitation spectra of CaSiO_3:Eu_(0.08)~(3+)Bi_(0.002)~(3+)and Sr_2SiO_4:Eu_(0.08)~(3+)Bi_(0.002)~(3+), it can be seen that the main peaks located at 267 nm, 383 nm, 395 nm, 437 nm, 457 nm and 359nm, which correspond to the charge transfer band of Eu~(3+)-O_2~, absorption transition of ~7F_(0.1)-~5G_J, ~7F_(0.1)-~5L_6> ~7F_1-~5D_3 and ~7F_(0.1)-~5D_2 of Eu~(3+) ions and ~3P_1-~1S_0 of Bi~(3+) ions, respectively. When the CaSiO_3:Eu_(0.08)~(3+)Bi_(0.002)~(3+) samples were excited with wavelength of 359 nm, the emission intensity of electronic dipole transition at 609 nm originated from ~5D_0-~7F_2 of Eu~(3+) ions was stronger than magnetic dipole transition at 587 nm originated from ~5D_0-~7F_1 of Eu~(3+) ions mainly due to the lower symmetry and the distortion of the structure. However, the opposite situation appeared in the emission spectrum of Sr_2SiO_4:Eu_(0.08)~(3+)Bi_(0.002)~(3+). In addition, the intensity comparison of each emission peaks between the emission spectra of CaSiO_3:Eu_(0.08)~(3+)Bi_(0.002)~(3+) and Sr_2SiO_4:Eu_(0.08)~(3+)Bi_(0.002)~(3+) showed that the energy transfer efficiency between Bi~(3+) ions and Eu~(3+) ions in Sr_2SiO_4:Eu_(0.08)~(3+)Bi_(0.002)~(3+) is apparently higher than that in CaSiO_3:Eu_(0.08)~(3+)Bi_(0.002)~(3+).

机译：通过溶胶-凝胶法合成了CaSiO_3：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）和Sr_2SiO_4：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+），研究了它们的结构和发光特性。 XRD结果表明，Sr_2SiO_4：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）结构与K_2SiO_4的非密堆积正交结构相似，其对称性高于CaSiO_3。：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）钙钛矿结构属于单斜晶系。从CaSiO_3：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）和Sr_2SiO_4：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）的激发光谱可以得出可以看到，主峰分别位于267 nm，383 nm，395 nm，437 nm，457 nm和359nm，对应于Eu〜（3 +）-O_2〜的电荷转移带，吸收跃迁为〜7F_（0.1） -〜5G_J，〜7F_（0.1）-〜5L_6>〜7F_1-〜5D_3和Eu〜（3+）离子的〜7F_（0.1）-〜5D_2和Bi〜（3+）离子的〜3P_1-〜1S_0，分别。当CaSiO_3：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）样品在359 nm的波长下激发时，609 nm处电子偶极跃迁的发射强度源自Eu的〜5D_0-〜7F_2 〜（3+）离子比587nm的磁偶极跃迁要强，这是由于Eu〜（3+）离子的〜5D_0-〜7F_1引起的，其对称性较低且结构变形。然而，在Sr_2SiO_4：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）的发射光谱中出现了相反的情况。另外，CaSiO_3：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）和Sr_2SiO_4：Eu_（0.08）〜（3+）Bi_（0.002）的发射光谱之间的每个发射峰的强度比较）〜（3+）表示Sr_2SiO_4：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）中Bi〜（3+）离子与Eu〜（3+）离子之间的能量转移效率为明显高于CaSiO_3：Eu_（0.08）〜（3+）Bi_（0.002）〜（3+）。

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《Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics》 |2008年第2期|共4页
作者
Jinghai Yang; Lili Yang; Wenyan Liu;
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Rare earth alloys and compounds; Sol-gel processes; Optical properties; Optical spectroscopy;

机译：稀土合金及化合物;溶胶凝胶法;光学性能;光谱学;

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1. Luminescence behavior of Eu~(3+) in CaSiO_3:Eu~(3+)(Bi~(3+)) and Sr_2SiO_4:Eu~(3+)(Bi~(3+)) [J] . Jinghai Yang, Lili Yang, Wenyan Liu Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics . 2008,第1a2期

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2. Tunable luminescence and energy transfer process between Tb~(3+) and Eu~(3+) in GYAG:Bi~(3+), Tb~(3+), Eu~(3+) phosphors [J] . Jin Young Park, Hong Chae Jung, G. Seeta Rama Raju Solid state sciences . 2010,第5期

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Luminescence behavior of Eu~(3+) in CaSiO_3:Eu~(3+)(Bi~(3+)) and Sr_2SiO_4:Eu~(3+)(Bi~(3+))

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