Abstract
Herein we report the optical and spectroscopic properties of lithium–calcium–bismuth–borate (LCBB) glasses containing Eu3+ prepared via the melt-quenching method, and the prepared samples were systematically characterised through X-ray diffraction (XRD), Raman, ultraviolet–visible–near-infrared (UV–Vis-NIR) and photoluminescence (PL) spectroscopic techniques. The absence of XRD peaks evidenced the amorphous nature of glass. Different borate functional groups were identified from Raman spectra. Urbach energy and radiative properties were evaluated from the UV–Vis–NIR absorption spectra. The phonon energy of the glass samples was estimated by considering the energy differences between the zero-phonon level (ZPL) and phonon side bands (PSBs) present in excitation spectra. Judd–Ofelt (JO) parameters have been evaluated from the luminescence intensity ratios of 5D0 → 7FJ (J = 2, 4) to 5D0 → 7F1 transitions. These parameters have been used to derive radiative properties such as transition probabilities, branching ratios, radiative lifetimes and peak stimulated emission cross-sections for the 5D0 → 7FJ transitions. The JO results and the lifetime decay studies showed that LCBBEu2 glass exhibits higher stimulated cross-section (16.74 × 10–22 cm2) and quantum efficiency (67.80%), which is highest among the reported by other research groups. Also, the LCBB doped with Eu3+ glasses exhibit strong emission in the red region, making them potential candidates for photonic device applications.
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Acknowledgements
The authors (M.A. and S.N.) thank the Department of Physics, Bangalore University, JB Campus, for extending XRD and RAMAN facilities. The authors (M. Al-D and N. S. A. G) extend their appreciation to the Deanship of scientific Research at King Khalid University for funding this work through large group project under the grant number RGP.2/46/45. Authors also acknowledge the PL facility support from Centre of Excellence in Advanced materials research, Department of Physics, School of Applied Sciences, REVA University, India.
Funding
The current work was assisted financially from Deanship of scientific Research at King Khalid University for funding this work through Large Group project under the Grant number RGP.2/46/45.
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All authors contributed to the study’s conception and design. Material preparation was done by AM and NS. The data collection was performed by AM, UKK and NS. The analysis of the results was executed by AM, UKK, RR, CKJ, MAD, NSAEL-G and NS. The first draft of the manuscript was written by AM and NS, and all authors commented on upgrading versions of the manuscript. All authors read and approved the final manuscript.
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Madhu, A., Kagola, U.K., Rajaramakrishna, R. et al. Optical and spectroscopic studies on Eu3+ doped LCBB glasses for photonic device applications. Appl. Phys. A 130, 193 (2024). https://doi.org/10.1007/s00339-024-07346-5
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DOI: https://doi.org/10.1007/s00339-024-07346-5