Structural and optical properties of the lead based glasses containing iron (III) oxide

The increase of the iron (III) oxide content in the host matrix implies a shift of the fundamental absorption edge towards higher wavelengths, the decrease of the band gap energy values and the increase of refractive index values lead the improvement of optical properties in the visible range as well as of conductive properties of studied materials. It is interesting to observe that the optical band gap energies for these glasses slightly decrease with the addition of Fe2O3 concentration; it is due to the creation of non-bridging oxygens and the increase of disorder degree of the host matrix.