Photoluminescence Properties and Energy Transfer from Ce^3＋ to Tb^3＋ in Zn2SiO-4 Host

• Published in: 武汉理工大学学报：材料科学英文版 2015 (2), p.235-240
• Main Author: 熊晓波 袁曦明 LIANG Yujun SONG Jiangqi WU Qi YIN Guoxiang
• Format: Article
• Language: English
• Subjects: 主机; 偶极相互作用; 光致发光光谱; 光致发光特性; 能量传递; 能量转移; 铽
• ISSN: 1000-2413; 1993-0437

Zn2Si O4︰Tb^3＋, Zn2 Si O4︰Ce^3＋, Zn2 Si O4︰Tb^3＋, Ce^3＋ phosphors were prepared by solidstate reaction at 1 150 ℃ for 2h under a weak reducing atmosphere. Moreover, the XRD patterns and photoluminescence spectra were recorded and the effects of Tb3＋ and Ce3＋ 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 5D4→7F5 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 Ce3＋ and Tb3＋ was due to the electric dipolar-dipolar interaction of the resonance transfer.