RED-EMITTING TELLURITE GLASSES: A COMBINED INVESTIGATION OF PHYSICAL, STRUCTURAL, OPTICAL AND LUMINESCENCE PROPERTIES FOR POTENTIAL WLEDS AND SCINTILLATION APPLICATIONS
DOI:
https://doi.org/10.55766/sujst6188Keywords:
Eu3+ ions, Glass material, Luminescence, ScintillatorAbstract
This study explores the influence of varying Europium oxide (Eu2O3) concentrations on the physical, structural, optical, and luminescence properties of boro-tellurite glasses. Glass samples were synthesized via the melt-quenching technique with Eu2O3 concentrations ranging from 0 to 3 mol%. Analytical techniques, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), and photoluminescence (PL) spectroscopy, were employed. Results revealed a increase in density and decreased molar volume with higher Eu2O3 content, indicating network expansion due to the larger ionic radius of Eu3+ ions. FTIR confirmed the presence of BO3 and BO4 units, with increased BO4 proportions suggesting the role of Eu³⁺ ions as network modifiers. Photoluminescence studies showed characteristic emissions of Eu³⁺ ions, with the maximum intensity observed at 1.5 mol% Eu2O3 before concentration quenching occurred. Judd-Ofelt analysis demonstrated high asymmetry in the Eu3+ local environment, while CIE chromaticity coordinates highlighted a reddish-orange hue, suitable for white light-emitting diode (WLED) applications. X-ray-induced luminescence showed patterns consistent with photoluminescence, with the 1.5 mol% sample achieving 27.48% scintillation efficiency compared to a bismuth germanate (BGO) crystal. These findings underline the potential of Eu3+-doped glasses as gain media for lasers and as phosphors for WLEDs, especially in indoor lighting and scintillation applications.
References
Boonin, K., Yasaka, P., Limkitjaroenporn, P., Rajaramakrishna, R., Askin, A., Sayyed, M.I., Kothan, S., and Kaewkhao, J. (2020). Effect of BaO on lead free zinc barium tellurite glass for radiation shielding materials in nuclear application. Journal of Non-Crystalline Solids, 550:120386. https://doi.org/10.1016/j.jnoncrysol.2020.120386
Gaafar, M.S. and Marzouk, S.Y. (2007). Mechanical and structural studies on sodium borosilicate glasses doped with Er2O3 using ultrasonic velocity and FTIR spectroscopy. Physica B: Condensed Matter, 388(1-2): 294-302. https://doi.org/10.1016/j.physb.2006.06.132
Hong, K.S., Kim, M., Ha, M.G., Kim, J.P., Yoon, J.H., Kim, J.H., Yang, H.S., and Kim, H.G. (2019). Red-emission properties and crystallization behavior in Eu2O3-TeO2
Figure 11. The X-rays induced luminescence spectra of Eu2O3: 1.5 mol% doped glass compared with the BGO crystal scintillator glasses. Journal of Non-Crystalline Solids, 505:400-405. https://doi.org/10.1016/j.jnoncrysol.2018.10.030
Karthikeyan, P., Vijayakumar, R., and Marimuthu, K. (2017). Luminescence studies on Dy3+ doped calcium boro-tellurite glasses for white light applications. Physica B: Condensed Matter, 521:347–354. https://doi.org/10.1016/ j.physb.2017.07.018
Khan, I., Rooh, G., Rajaramakrishna, R., Sirsittapokakun, N., Kim, H.J., Kaewkhao, J., and Kirdsiri, K. (2019). Energy transfer phenomenon of Gd3+ to excited ground state of Eu3+ ions in Li2O-BaO-Gd2O3-SiO2-Eu2O3 glasses. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 210:21–29. https://doi.org/10.1016/ j.saa.2018.11.008
Melo, G.H.A., Dias, J.D.M., Lodi, T.A., Barboza, M.J., Pedrochi, F., and Steimacher, A. (2016). Optical and spectroscopic properties of Eu2O3 doped CaBAl glasses. Optical Materials, 54:98-103. https://doi.org/10.1016/j.optmat. 2016.02.015
Noorazlan, A.M., Kamari, H.M., Zulkefly, S.S., and Mohamad, D.W. (2013). Effect of erbium nanoparticles on optical properties of zinc borotellurite glass system. Nanomaterials, 2013:Article 940917. https://doi.org/ 10.1155/2013/940917
Rajesh, M., Reddy, G.R., Sushma, N.J., Devarajulu, G., and Raju, B.D.P. (2020). Phonon sideband analysis, structural and spectroscopic properties of Eu3+ ions embedded SiO2-B2O3-CaF2-NaF-Na2O glasses. Optical Materials, 107:110038. https://doi.org/10.1016/j.optmat.2020.110038
Rao, A.S., Rao, B.R.V., Prasad, M.V.V.K.S., Kumar, J.V.S., Jayasimhadri, M., Rao, J.L., and Chakradhar, R.P.S. (2009). Spectroscopic and optical properties of Nd3+ doped fluorine containing alkali and alkaline earth zinc-aluminophosphate optical glasses. Physica B: Condensed Matter, 404(20):3570-3576. https://doi.org/10.1016/ j.physb.2009.06.114
Stambouli, W., Elhouichet, H., Gelloz, B., and Férid, M. (2013). Optical and spectroscopic properties of Eu-doped tellurite glasses and glass ceramics. Journal of Luminescence, 138:201-208. https://doi.org/10.1016/j.jlumin.2013.01.019
Zaman, F., Kaewkhao, J., Rooh, G., Srisittipokakun, N., and Kim, H.J. (2016). Optical and luminescence properties of Li2O-Gd2O3-MO-B2O3-Sm2O3 (MO=Bi2O3, BaO) glasses. Journal of Alloys and Compounds, 676:275-285. https://doi.org/10.1016/j.jallcom.2016.03.176
Zhang, L., Sun, Q., Wang, J., Zhang, Z., Zhang, W., Wang, J., Chen, H., and Li, M. (2021). Effect of SrO content on microstructure of Bi2O3-B2O3-ZnO-BaO-SrO low-melting glass frit and joining performance of soda lime glass substrates. Journal of Alloys and Compounds, 872:159707. https://doi.org/10.1016/j.jallcom.2021.159707
Zhou, L., Lin, H., Chen, W., and Luo, L. (2008). IR and Raman investigation on the structure of (100-x)B2O3-x[0.5BaO-0.5ZnO] glasses. Journal of Physics and Chemistry of Solids, 69(10):2499-2502. https://doi.org/10.1016/ j.jpcs.2008.05.013
