The optical absorption study of cadmium-zinc phosphate glasses

EPR, optical absorption and photoluminescence properties of Cr3+ ions in lithium borophosphate glasses

“…From the graph it is clear that the addition of chromium to the glass causes a reduction in the optical energy gap and this is consistent with the initiation of band tailing suppressed to occur at lower values of N(E), the density of states function, as reported by Hogarth and Novikov [36]. The optical band gap obtained in the present work is 3.3-3.0 eV which is in the same order as reported in literature for phosphate glasses [37,38]. It is observed that the optical band gap decreases with increase in concentration of chromium content.…”

EPR, optical absorption and luminescence studies of Cr3+-doped antimony phosphate glasses

“…Plotting The optical band gap values (E opt ) are found to be 3.22, 2.98 and 2.85 eV, for samples with 0, 3 and 6 mol% Cr, respectively. The optical band gap values obtained in the present work are consistent with the values reported for phosphate glasses [30,31]. It is verified that the optical band gap decreases (red shift) with an increase of the Cr 3+ doped into the SbPO glasses.…”

Effect of Li2O on the Refractive Index and Optical Band Gap of Cadmium Phosphate Glasses

“…A number of publications regarding the optical and electrical properties of phosphate glasses have appeared in scientific literature [12][13][14][15][16][17][18][19]. It has been suggested that the presence of interstitial or dangling bonds gives rise to localized states or traps near the band edges of glassy materials.…”