Evaluation of photoluminescence and colorimetric performance of Tb3+-induced calcium tungstate ceramic

Photoluminescence and colorimetric investigations of Ca 1− x Tb 2 x /3 WO 4 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 den...

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Bibliographic Details
Published in:The European physical journal. B, Condensed matter physics Condensed matter physics, 2024-06, Vol.97 (6), Article 79
Main Authors: Paikaray, R., Badapanda, T., Sahoo, S., Mohapatra, H.
Format: Article
Language:English
Subjects:
Calcium tungstates
Colorimetry
Complex Systems
Condensed Matter Physics
Dipoles
Emission spectra
Energy transfer
Excitation spectra
Fluid- and Aerodynamics
Optical properties
Phosphors
Photoluminescence
Physics
Physics and Astronomy
Regular Article - Solid State and Materials
Scheelite
Service life assessment
Solid State Physics
Spectrum analysis
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Summary:Photoluminescence and colorimetric investigations of Ca 1− x Tb 2 x /3 WO 4 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 I4 1 /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 CaWO 4 . 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 CaWO 4 material is obtained by exciting it with 485 nm wavelength. Average lifetime values are evaluated by analyzing the PL decay plots. Graphical abstract CIE chromaticity diagram of Tb-doped CaWO 4 at 485 nm EX wavelength
ISSN:1434-6028
1434-6036
DOI:10.1140/epjb/s10051-024-00726-z