Physical and spectroscopic studies of Sm3+ ions doped Alumino Tungsten Borate glasses for photonic applications

• Published in: Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2022-01, Vol.190, p.109806, Article 109806
• Main Authors: Murty, V.R.L., Venkateswarlu, M., Swapna, K., Mahamuda, Sk, Rani, P. Rekha, Rao, A.S.
• Format: Article
• Language: English
• Subjects: Absorption spectra; Alumino tungsten borate glasses; Barium fluorides; Boron oxides; Chromaticity; CIE Chromaticity coordinates; Decay; Electronic devices; Emission analysis; Emission spectra; Excitation; Fluorescence; Judd-ofelt parameters; Laser applications; Mathematical analysis; Optical absorption; Optical properties; Optoelectronic devices; Oscillator strengths; Parameters; Photoluminescence; PL decay; Radiative lifetime; Radiative parameters; Samarium; Spectral emissivity; Stimulated emission; Transition probabilities
• ISSN: 0969-806X; 1879-0895
• DOI: 10.1016/j.radphyschem.2021.109806

Trivalent samarium ion doped glasses with molar composition 10MgO–10WO3–10Al2O3–BaF2-(60-X) B2O3- XSm2O3 (where X = 0.5, 1.0, 1.5, 2.0, 2.5 mol %) are prepared by melt quenching method. These glasses are characterized by various spectroscopic techniques such as optical absorption, excitation, emission and decay spectral studies. The amorphous nature is confirmed by XRD studies. From the absorption spectra, oscillator strengths and the Judd-Ofelt (J-O) intensity parameters (Ω2, Ω4, Ω6) are calculated. The measured emission spectra exhibit four transitions 4G5/2 → 6H5/2, 6H7/2, 6H9/2 and 6H11/2 at 565 nm, 602 nm, 650 nm and 709 nm. Various radiative parameters such as branch ratio (βR), transition probability (AR), radiative lifetime (τR), effective bandwidth (Δλp) and stimulated emission cross-section (σse) have been calculated. The photoluminescence decay measurements are carried out at 4G5/2 fluorescent level of Sm3+ ion doped AlWB glasses under 402 nm excitation wavelength. From decay curve analysis, quantum efficiencies of the as prepared glasses are calculated. The CIE Chromaticity coordinates are evaluated from the emission spectra which establishes the reddish orange emission from the prepared glasses. From the above luminescent properties, it is understood that the prepared glasses are suitable for reddish orange laser applications especially in opto-electronic devices. •Sm3+ ions doped AlWB glasses were fabricated.•Emission peaks at 565 nm, 602 nm, 650 nm and 709 nm were observed.•Highest emission intensity is observed for AlWBSm10 as prepared glass.•Highest Quantum efficiency 86.51% observed for AlWBSm10 glass.