Paikaray R, Badapanda T, Sahoo S, Mohapatra H
Department of Physics, C.V. Raman Global University, Bhubaneswar, Odisha, 752054, India.
Department of Physics, Odisha University of Technology and Research, Bhubaneswar, 751029, Odisha, India.
J Fluoresc. 2025 Apr;35(4):2227-2234. doi: 10.1007/s10895-024-03643-7. Epub 2024 Mar 23.
This paper represents structure, photoluminescence, and colorimetric investigations of Sm-activated CaWO ceramic made with the help of a solid-state reaction process. Structures of the ceramics are examined through X-ray diffraction spectroscopy. It indicates that these materials have a tetragonal structure and I4/a space group without having any other secondary phase. Energy band gaps are increased with the higher concentrations of Sm dopants. Photoluminescence analyses show that concentration quenching is found at x = 0.02 Sm incorporated CaWO. The critical distance of energy transfer is obtained as about 20 Å. Q-value is observed approximately equal to 6 which denotes that dipole-dipole interactions occur in the materials that create the critical energy transfer distance in them. Chromaticity values are described in that the ceramics emit orange-red color as well as excellent colorimetric parameters. Quantum efficiency of x = 0.02 Sm composition in CaWO is measured under 405 nm EX wavelength. Photoluminescence decay behaviors are observed and average lifetime values are evaluated.
本文介绍了通过固态反应工艺制备的Sm激活CaWO陶瓷的结构、光致发光和比色研究。通过X射线衍射光谱对陶瓷结构进行了检测。结果表明，这些材料具有四方结构和I4/a空间群，且不存在任何其他次生相。随着Sm掺杂剂浓度的增加，能带隙增大。光致发光分析表明，在x = 0.02 Sm掺杂的CaWO中发现了浓度猝灭现象。能量转移的临界距离约为20 Å。观察到Q值约等于6，这表明材料中发生了偶极-偶极相互作用，从而产生了临界能量转移距离。色度值表明，该陶瓷发出橙红色光，且具有优异的比色参数。在405 nm激发波长下测量了CaWO中x = 0.02 Sm组成的量子效率。观察了光致发光衰减行为并评估了平均寿命值。
