Influence of Fe substitution on the Eu-doped lithium borosilicate glass system's physical, thermal, magnetic, and luminescent properties

Abstract

The quenching melt process was used to create transparent glass samples of the Fe and Eu-co-doped lithium borosilicate glasses. The structure of the glass sample affects the molar volume, optical band gap, and thermal characteristics (glass transitions, softening, and melting temperatures). According to Mössbauer spectroscopy, the Fe2+/(Fe2+ + Fe3+) ratio remains between 0.1 and 0.13, and the valence state of iron ions is not significantly altered with Eu2O3 presence. With increasing Eu2O3 content, magnetic susceptibility was shown to decrease. Energy levels determined by UV/Vis and NIR spectroscopy, located at 362, 380, 395, 414, 465, 533, 583, 590, 2092, and 2202 nm were assigned to 7F0 → 5D4, 7F0 → 5G2, 7F0 → 5L6, 7F0 → 5D3, 7F0 → 5D2, 7F0 → 5D1, and 7F0 → 5D0 electronic transitions, respectively. Five transition band emission spectra were identified using an excitation wavelength of 395 nm. It was observed that by increasing Fe3+, the intensity of the emission peak decreases.