MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
College of Sciences & CQUPT-BUL Innovation Institute, Chongqing University of Posts and Telecommunications, Chongqing, 400065, P. R. China.
Chemistry. 2022 May 25;28(30):e202200381. doi: 10.1002/chem.202200381. Epub 2022 Apr 13.
Eu -, Mn - and Eu -Mn -doped CaMgSi O phosphors have been prepared by a high-temperature solid-state reaction. Systematic investigation of the concentration- and temperature-dependent luminescence of Mn showed that Mn ions occupy two distinct sites in CaMgSi O . Electron-vibration interaction (EVI) analyses of Mn ions revealed Huang-Rhys factors of 4.73 and 2.82 as well as effective phonon energies of 313 and 383 cm for the two sites. Eu -Mn energy transfer is also discussed, and its efficiency is estimated by lifetime and luminescence spectra. The different thermal quenching behaviours of Eu and Mn , the distinct emission colours of Eu (blue, band peak at ∼451 nm) and Mn (yellow-red range, band peaks at ∼583 and 693 nm) endow the co-doped samples with potential applications in luminescence thermometry and temperature-/excitation wavelength-responsive dual anti-counterfeiting.
Eu-、Mn-和 Eu-Mn 掺杂的 CaMgSiO 荧光粉通过高温固相反应法制备而成。对 Mn 的浓度和温度依赖性荧光的系统研究表明，Mn 离子占据 CaMgSiO 中的两个不同位置。对 Mn 离子的电子-振动相互作用（EVI）分析表明，两个位置的 Huang-Rhys 因子分别为 4.73 和 2.82，有效声子能量分别为 313 和 383 cm。还讨论了 Eu-Mn 能量转移，通过寿命和发光光谱来估计其效率。Eu 和 Mn 的不同热猝灭行为、Eu（蓝色，带峰值约为 451nm）和 Mn（黄-红色范围，带峰值分别约为 583 和 693nm）的不同发射颜色使共掺杂样品在发光测温以及温度/激发波长响应型双重防伪方面具有潜在应用。
