Influence of dysprosium concentration on sensitivity of luminescent thermometers of phosphors Ca9Tb(PO4)5(SiO4)F2

• 作者: Jingxue Zhang Lefu Mei Yuanyuan Zhang Qingfeng Guo Libing Liao Haikun Liu
• 来源期刊: 稀土学报（英文版）
• 年，卷（期）: 2021,（8）
• 所属期刊栏目: SPECTROSCOPY,LUMINESCENCE AND PHOSPHORS
• 页码范围: 946-951
• 页数: 6页
• 语种: 英文

摘要

Tb3+,Dy3+-co-doped Ca9TbxDy1-x(PO4)5(SiO4)F2 phosphors were prepared via high-temperature solid-phase reaction method and the potential application in optical temperature measurements due to their color-tunable property was investigated in detail.The photoluminescence emission (PL) and photo-luminescence excitation (PLE) spectra results show that the as-prepared phosphors exhibit both Tb3+ and Dy3+ emissions at 546 nm (5D4-7F5 transition of Tb3+) and 587 nm (4F9/2-6H13/2 transition of Dy3+) upon 376 nm excitation,respectively.In addition,the fluorescence decay analysis shows that the lifetime of the Tb3+ emission rapidly decreases,which confirms the energy transfer existence between Dy3+ and Tb3+.Under 376 nm excitation,the temperature dependence of the fluorescence intensity ratios for the dual-mission bands peaked at 546 and 587 nm was studied in the temperature range from 303 to 573 K.The results show that with the increase of Dy3+ concentration,the relative sensitivity first increases and then decreases,what's more,the maximum relative sensitivity is 3.142 × 10-3％/K for Ca9TbxDy1-x(PO4)5(SiO4)-F2 (x =0.4).As a consequence,this preliminary study provides a novel method for exploring the novel thermometers.