Photoluminescence properties and energy transfer from Ce3+ to Tb3+ in Zn2SiO4 host

• Published in: Journal of Wuhan University of Technology. Materials science edition Vol. 30; no. 2; pp. 235 - 240
• Main Authors: Xiong, Xiaobo, Yuan, Ximing, Liang, Yujun, Song, Jiangqi, Wu, Qi, Yin, Guoxiang
• Format: Journal Article
• Language: English
• Published: Heidelberg Wuhan University of Technology 01.04.2015
• Subjects: Advanced Materials; Chemistry and Materials Science; Materials Science; emission; Ce; Zn; SiO; energy transfer; phosphors; Tb; transition
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-015-1131-8

Zn 2 SiO 4 : Tb 3+ , Zn 2 SiO 4 : Ce 3+ , Zn 2 SiO 4 : Tb 3+ , Ce 3+ phosphors were prepared by solidstate reaction at 1 150 °C for 2 h under a weak reducing atmosphere. Moreover, the XRD patterns and photoluminescence spectra were recorded and the effects of Tb 3+ and Ce 3+ concentration on the luminescent properties of as-synthesized phosphors were investigated. The emission spectra under ultraviolet light (333 nm) radiation showed a dominant peak at 542 nm attributed to the 5 D 4 → 7 F 5 transition of Tb 3+ , which was enhanced significantly (about 45 times) by the co-doping of Ce 3+ , indicating that there occurred an efficient energy transfer from Ce 3+ to Tb 3+ . According to the Dexter’s energy transfer formula of multipolar interaction, it was demonstrated that the energy transfer between Ce 3+ and Tb 3+ was due to the electric dipolar-dipolar interaction of the resonance transfer.