Dielectric Constant, Metallization Criterion and Optical Properties of CuO Doped TeO2–B2O3 Glasses

Copper oxide doped TeO2–B2O3 glass system with empirical formula; $${[\left({{\text{B}}_{2}{\text{O}}_{3})}_{0.3}{\left({\text{TeO}}_{2}\right)}_{0.7}\right]}_{1-x}{(\text{CuO})}_{x}$$ was fabricated using the melt quenching method, where x = 0.0, 0.01, 0.015, 0.02, and 0.025 combined. The samples’ density molar volume were measured, followed by characterizations UV–Vis, Fourier transform infrared (FTIR), X-ray diffraction (XRD) spectroscopes. amorphous or glassy nature of samples proven XRD spectra except for pure borotellurite sample which showed a peak around 2? 20°, indicating ?-TeO2 crystalline phase presence. FTIR spectral analysis suggested presence BO3, TeO3, TeO4 as structural units in samples. UV–Vis no any sharply defined edges, affirming materials. Physical parameters e.g. volume, density, oxygen packing (OPD), interionic distance Cu2+ ions, concentration copper ion per unit (N), well polaron radius data presented discussed. Also, direct bandgap (3.8900 to 3.5900 eV), indirect (3.3200 3.0800 refractive index (2.318 2.378), dielectric constant (5.3731 5.6549), optical (4.3731 4.6549), based metallization criterion (0.406885 0.391916) (0.407431 0.392428) analyzed Based on values index, glasses are good candidates optoelectronic laser applications. Meanwhile, constants’ present indicate their suitability bandpass filters microelectronic substrates