Application of Cu2O-doped phosphate glasses for bandpass filter

Phosphate glasses doped with copper ions having general composition 42P(2)O(5)-39ZnO-(18-x) Na2O-1CaO-xCu(2)O [x=2, 4, 6, 8, 10 mol%] were prepared using a conventional melt-quench technique. Physical and chemical properties of the glasses were investigated using X-ray diffraction technique and UV-visible optical absorption. The density was measured by Archimedes' method, and molar volume (V-M) was calculated. It is found that density and molar volume show opposite trend by increasing Cu2O content. Absorbance and transmittance at the normal incidence are measured by a spectrophotometer in the spectral range of 190-1100 nm. Analyses of the obtained results were considered in he frame of current theories. Absorption data were used for absorption coefficient, the optical band gap (E-opt), the cutoff in UV and IR bands to the bandpass filter, which confirmed the optical properties of this type of Filter. E-opt values for different glass samples are found to decrease with increasing Cu2O content. (C) 2014 Elsevier B.V. All rights reserved.