© 2021 Elsevier B.V.In this study, V2O5, P2O5 and B2O3 oxide compounds, traditional glass formers, were used simultaneously and dark Cu-doped VPB glasses were successfully synthesized. Glass composition was determined as 46V2O5–46P2O5–(8-x)B2O3–xCuO (mol%) and undoped and Cu-doped glasses were synthesized with melt-quenching method. By changing the CuO and B2O3 in the structure, it was investigated how the properties of the synthesized glasses change with the addition of transition metal oxide to the structure. Firstly, the physical properties of the synthesized glasses were determined such us density and molar volume. X-ray diffraction (XRD) and Fourier Transform Infrared Spectroscopy (FTIR) analyzes were performed to observe the changes of transition metal oxide additive to the glass structure. The optical band gaps and Urbach energies of the glass series that absorb the visible region and whose transmittance starts at approximately 1750 nm were calculated by using Tauc plot method. Finally, the thermal properties of the synthesized glasses were performed via differential scanning calorimetry (DSC).