Some studies of the optical properties of copper phosphate glasses containing praseodymium

Abstract

A range of copper phosphate glasses containing praseodymium was prepared and the optical absorption edges and infrared optical absorption spectra were measured. The optical energy gap of copper phosphate glass doped with praseodymium is slightly higher than the corresponding composition of the base glass. Heat treatment at 400 and 800~ caused some changes in the infrared absorption bands which are related to the characteristics of the Pr6Oll component.

Study of structure and optical properties of Fe2O3·CaO·Bi2O3 glasses

“…This origin is attributed to phonon-assisted indirect electronic transitions between localized states, where the density of these states is exponentially dependent on energy [20]. The Urbach's energy arises from the random potential fluctuations in the material into the band gap [21,22]. The Urbach plot for FCB35 and FCB40 glass sample is shown in the inset of Fig.…”

Effect of Annealing on Optical Properties of ZnO·LiF·B2O3 Glasses

“…Disordered arrangement of atoms causes the mobility edges to enter in the mobility gap and give rise to the tail states. The formation of such localized states can thus be attributed to the random potential fluctuations [17]. The electronic transitions taking place in such states are generally phonon assisted [18,19].…”

Effect of Stepwise Replacement of LiF by Bi2O3 and of Annealing on Optical Properties of LiF⋅B2O3 Glasses

“…E U arises due to presence of the disordered arrangement of atoms, which causes the mobility edges to enter in the mobility gap and give rise to the tail states. Formation of such localized states can thus be attributed to the random potential fluctuations [25]. Generally, in such states the phonon-assisted electronic transitions take place [26,27].…”