Abstract
Europium doped Na2O–ZnO–TeO2 glasses were prepared by conventional melt technique. The differential thermal analysis and thermal gravimetric analysis confirmed the formation of glass with glass transition temperature about 446°C for all the doped glasses. The X-ray diffraction spectra revealed that these glasses were amorphous in nature. The absorption and emission spectra of these prepared samples were characterized by the UV-VIS spectroscopy and photoluminescence studies. It was found that the band gap energy of these glasses decreases rapidly (2.86–1.43 eV) with the increase of doping concentration. Optical properties of the samples had shown the enhanced luminescence at 537 nm (5D0−7F0), at 591 nm (5D0−7F1) and at 614 nm (5D0−7F2) due to doping of europium (Eu3+). The emission cross-section for the transition 5D0–7F2 was also estimated. The dielectric constant of glass samples were studied for different frequencies. The conductivity of the samples was measured and suggested the Arrhenius mechanism of conduction.
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ACKNOWLEDGMENTS
Authors are thankful to the CRF, IIT Kharagpur for providing amenities to study DTA and TGA. The authors wish to thanks Midnapore College for support this research.
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The work is partially supported by DST Govt. of West Bengal research project (Memo no. 296 (Sanc)/ST/P/S&T/16G- 17/2017) of India.
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Mirdda, J.N., Mukhopadhyay, S., Sahu, K.R. et al. Enhancement of Optical Emission and Dielectric Properties of Eu3+-Doped Na2O–ZnO–TeO2 Glass Material. Glass Phys Chem 46, 218–227 (2020). https://doi.org/10.1134/S1087659620030104
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DOI: https://doi.org/10.1134/S1087659620030104