A novel energy transfer inducing strong enhancement of electric dipole transition in Na3Mo12PO40:xEu(3+) phosphors

作者：Long, Jinqiao; Wang, Tianman; Luo, Zhirong; Gao, Yong; Song, Baoling; Liang, Jing; Liao, Sen^*; Huang, Yingheng; Zhang, Huaxin

来源：Materials Research Express, 2017, 4(8): 086305.

DOI：10.1088/2053-1591/aa8146

• inorganic compounds
• optical materials
• chemical synthesis
• luminescence
• optical properties

A series of Na3Mo12PO40:xEu(3+) phosphors have been successfully synthesized by a solid-state method, and characterized by powder x-ray diffraction (PXRD). The PXRD results confirm that the samples have crystal phases of Na3Mo12PO40. For PL spectra of Na3Mo12PO40:2.0Eu(3+) excited by 394 and 465 nm, R (R is the peak area ratio of D-5(0) -> F-7(2) to D-5(0) -> F-7(1)) is only 1.46 with an excitation of 394 nm, but increases to 3.03 with an excitation of 465 nm. Furthermore, a new enhancement of electric dipole transition is observed. Emission spectrum (PL) intensity at 617 nm excited by 465 nm is 1.95 times as high as the excitation spectrum (PLE) intensity at 465 nm. Thus, cooperative energy transfers from the magnetic dipole (MD) Eu3(+) center to the electric dipole (ED) Eu3+ center when excited by 465 nm is demonstrated for the new fluorescent behavior.

• 出版日期2017-8
• 单位广西大学; 百色学院