Band gap in cadmium zinc phosphate glass

Abstract The band gap in cadmium zinc phosphate glass samples with composition 35 mol% CdO-5 mol% ZnO-60 mol% P 2 O 5 has been determined by absorption and photoconduction measurements. The two values of the band gap are nearly the same within the experimental error. The photoconductive band gap shows a slow decrease with an increase in the applied field. The results have been discussed in terms of the energy band model for non-crystalline solids.