Spectroscopic assessments on Sm 3+ ions doped phospho-borate glasses mixed with fluoride modifiers for the applications of reddish-orange visible light

• Published in: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy Vol. 324; p. 124963
• Main Authors: Indhrapriyadarshini, A, Naseer, K A, Komal Poojha, M K, Kebaili, Imen, Marimuthu, K
• Format: Journal Article
• Language: English
• Published: England 05.01.2025
• Subjects: Bonding parameter; Lifetime; Emission cross-section; Reddish-orange emission; JO intensity parameter; Oscillator strength; Molar refractivity
• ISSN: 1873-3557

Sm ions doped Phospho-Borate glasses were synthesized and their physical and spectroscopic parameters were studied to evaluate its potential reddish-orange emission for photonic applications. Structural investigation made through XRD analysis confirms the amorphous nature. The evaluated bonding parameters from the absorption spectral analysis confirm the ionic bonding of the Sm-O network in the prepared glasses. Four emission bands were observed from the luminescence spectra, and the HT G → H is observed at 601 nm. The oscillator strength values elucidate the intensity of the absorption bands, and the PBKZnF:Sm sample exhibits a higher oscillator strength value. The Judd-Ofelt intensity parameters were observed to trail the trend Ω  > Ω  > Ω for the majority of the samples. The CIE 1931 color chromaticity investigation confirms that the present glass samples are suitable for reddish-orange media. Barium and strontium-incorporated glasses exhibit outstanding lasing potential, which was confirmed through the efficiency of the quantum yield and some of the radiative parameters like effective bandwidth, transition probability and stimulated emission cross-section. Radiative parameters have been calculated from the luminescence spectra. Amid all transitions, G → H transition has higher transition probability and higher stimulated emission cross-section values for all the prepared glass samples. Barium-incorporated glass exhibits a higher emission cross-section of 30.55 × 10 cm and a transition probability of 30.89 s compared to all other glasses. The non-exponential decay profiles of the fabricated samples were plotted by examining the excitation wavelength at 402 nm and emission wavelength at 600 nm. Of all the prepared glasses, the quantum efficiency is found to be higher for the glass sample PBKSrF:Sm (65 %).