https://doi.org/10.1140/epjb/s10051-024-00726-z
Regular Article - Solid State and Materials
Evaluation of photoluminescence and colorimetric performance of Tb3+-induced calcium tungstate ceramic
1
Department of Physics, C.V. Raman Global University, 752054, Bhubaneswar, Odisha, India
2
Department of Physics, Odisha University of Technology and Research, 751029, Bhubaneswar, Odisha, India
Received:
3
March
2024
Accepted:
7
June
2024
Published online:
21
June
2024
Photoluminescence and colorimetric investigations of Ca1−xTb2x/3WO4 with x vary from 0.01 to 0.05 samples made by employing the solid-state reaction routes are represented in this paper. Structural analyses of all the phosphors are done with the help of X-ray diffraction spectroscopy and denoted that they exhibit a tetragonal structure and I41/a space group without containing any secondary phase. Optical properties are described with the help of the UV–visible reflectance spectra. In addition, the energy bandgap values are evaluated from these spectra and the values are increased concerning the rise in the Tb contents in CaWO4. Photoluminescence studies are done by considering PL excitation spectra as well as PL emission spectra. The critical concentration of quenching is observed at the composition x = 0.03 along with the critical distance of energy transfer is computed to be ~ 20 Å. Moreover, this distance is created by the dipole–dipole exchanges and indicated by the calculated Q value. Colorimetric analyses of the samples are done from the CIE color coordinates. The green emission color is obtained for all the materials. All the colorimetric parameters are evaluated and quantum yield efficiency for x = 0.03 Tb incorporated CaWO4 material is obtained by exciting it with 485 nm wavelength. Average lifetime values are evaluated by analyzing the PL decay plots.
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© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
