Optical Materials & Bio-imaging Research Laboratory, Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India.
Optical Materials & Bio-imaging Research Laboratory, Department of Applied Physics, Indian Institute of Technology (Indian School of Mines), Dhanbad 826004, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2019 Apr 5;212:78-87. doi: 10.1016/j.saa.2018.12.039. Epub 2018 Dec 28.
Through doping of Er/Yb ions the SrTiO perovskite ceramic is turned into an optically active material keeping its ferroelectric property intact. A huge enhancement of around 20 times in upconversion (UC) emission intensity is observed due to the transformation of cubic crystal structure to tetragonal phase. The intensity ratio of green to red band is found too high to neglect the contribution from the red emission band, which is not observed normally in such type of relatively moderate phonon frequency materials containing Yb/Er ions. The change in emission intensity is reflected in the decay time measurement. Optical temperature sensing behavior based on FIR technique also has been discussed for Er/Yb doped SrTiO ceramic.
通过掺杂 Er/Yb 离子，SrTiO3 钙钛矿陶瓷变成了一种光学活性材料，同时保持其铁电性能完好。由于立方晶体结构向四方相的转变，上转换（UC）发射强度大大增强，约增强了 20 倍。由于在这种相对中等声子频率的材料中通常观察不到 Yb/Er 离子存在的情况下，绿色到红色波段的强度比过高，不能忽略红色发射带的贡献。发射强度的变化反映在衰减时间测量中。还讨论了基于远红外（FIR）技术的 Er/Yb 掺杂 SrTiO3 陶瓷的光学温度传感行为。
