Characterization of Fe2O3 doping on structure, optical and luminescence properties of magnesium aluminosilicate-based glasses

Abstract The Fe2O3-doped magnesium aluminosilicate-based glasses were prepared by the traditional melt quenching method. The effects of Fe2O3 on the structure and properties of the prepared glasses were analyzed. DSC results indicate that the crystallization peak temperature is increasing first and then decreasing with Fe2O3 doping, and the thermal stability gradually decreases. Infrared spectrum curve illustrates that with increasing Fe2O3 content, the glass network is destroyed, and the number of non-bridging oxygen increases, resulting in a decrease of the optical band gap energy and an increase of the Urbach energy. In ultraviolet-visible absorption spectra, two bands observed around 540 and 1035 nm are corresponded to the electronic transitions of Fe3+ from 6A1g to 4T2g and Fe2+ from 5T2g to 5Eg, respectively. The obtained chromaticity coordinate parameters indicate that the prepared Fe2O3-doped magnesium aluminosilicate-based glasses can be applied to the fluorescent material of the light conversion layer of blue light-emitting diode device.