Dielectrically modified lanthanum (La³⁺) doped La_xCe₂-_xO₃/ SnO₂ nanocomposites for technological applications

Metal oxide nanocomposites are in high demand due to their versatile properties and wide range of applications in modern technology, including energy storage devices, electrode material design, and dye-sensitized solar cells (DSSCs). Nanocomposites of La_xCe_2-xO₃/SnO₂ were prepared via sol-gel method. This research work has reported a detailed study of the dielectric properties of LaxCe2-xO3/SnO2 nanocomposites at high frequencies (1 MHz–3 GHz). After forming a mixed phase, the surface morphology was confirmed by HR-TEM, resulting in a significant change in particle size and distribution. Different polarization stages, the effect of grain boundaries and the relaxation phenomenon were discussed with the impact of La³⁺ contents. Relaxation behaviour at high frequency was examined due to strong polarization. In addition, a high dielectric constant value at high frequency shows that these nanocomposites are eligible to store more energy. At x = 0.6, the maximum value of the dielectric constant was observed. Results demonstrate that La_xCe_2-xO₃/SnO₂ nanocomposites are competent for microwave, high-frequency devices and energy storage applications.