Research Information System
Optik, vol.272, 2023 (SCI-Expanded)
© 2022 Elsevier GmbHIn this study, the optical and conductivity properties of CeO2 ceramic oxide were investigated in terms of the contribution and synergistic effect. Undoped CeO2, CeO2:0.15La, and CeO2:0.10La0.05Gd compounds were synthesized via the hydrothermal method. Characterization studies were carried out using XRD, SEM, Raman spectroscopy, UV-Vis spectrophotometry, impedance spectroscopy, and photoluminescence spectrophotometry, respectively. It was determined that the synthesized compounds had a cubic crystal lattice structure. Raman spectroscopy was used to evaluate the concentration of oxygen vacancies in the samples. The void concentration in the CeO2:0.10La0.05Gd compound was calculated as 82 %. Gd positively affected oxygen vacancy formation. The conductivity of CeO2:0.10La0.05Gd at 700 °C was reported as 5.81 × 10−3 S/cm. The excitation and emission spectra of undoped CeO2, CeO2:0.15La, and CeO2:0.10La0.05Gd host crystals were investigated and compared. The results demonstrated that doping with La3+ and Gd3+ ions played an important role in greatly increasing the luminescence of CeO2 in the orange-red region. It was determined that with the synergistic effect, the Gd ion had increased the luminescence emission by 200-fold and the conductivity by 10-fold. In light of the data obtained (La-Gd), it was observed that it gave excellent results in terms of conductivity and luminescence properties with a synergistic effect.