Synthesis of Europium doped bismuth vanadium oxide in order to enhance electrical performance for energy generation devices and its DTFT band calculations

In this work we report the influence of Eu3+ on the structural, optical and conducting properties of bismuth vanadium oxide (Bi4V2O11). Various Eu3+ concentrations (0≤x≤0.20) was synthesized using the simple hydrothermal method. The results of structural characterization show that the monoclinic phase (α) is maintained during the inclusion of Eu3+ dopant into Bi4V2O11 lattice structure. TGA/DTA analysis was done up to 800 °C to measures the stability and weight loss. Impedance spectroscopy measurements reveal that the Eu3+ insertion improve the conducting properties as compared with the Bi4V2O11 sample. The maximum ionic conductivity is achieved with 0.20Eu/Bi4V2O11 (1.271 × 10−2 Scm−1 at 300 °C and 0.874 Scm−1 at 500 °C) and low activation energy of 0.43 and 0.32eV, characteristic of oxygen vacancy as a conducting mechanism. •Compositions of Europium (Eu3+) doped Bismuthvanadium Oxide have been synthesized via simple hydrothermal method by using system of Bi1-xEuxVO4 (x = 0.10, 0.15, 0.20).•Thermal, microstructural, optical, and electrical have been enhanced to different extents because of their low ionic radius mismatch.•Oxide ion conductivity is largely enhanced by the introduction of Eu3+ at intermediate temperature due to the low ionic radius mismatch, concentration of surface oxygen vacancies.•We have proposed two possibilities to explain these conducting properties in both high and low temperature ranges studied; activation energy is reduced -while conductivity increases-from Bi4V2O11 to 0.20Eu/Bi4V2O11.