An experimental investigation of structural, dielectric, and optical properties of Pr_0.5Ce_0.5FeO₃ perovskite for potential high frequency and optoelectronic applications

This work aims to study in detail the structural, impedance-spectroscopy, thermodynamic and optical properties of the Pr_0.5Ce_0.5FeO₃ compound. X-ray diffraction data reveals that our compound crystallize in the orthorhombic structure with the Pnma space group. Conductivity analyses reveals that the produced Pr_0.5Ce_0.5FeO₃ sample have significant electrical resistivity. These significant results, implies that our sample have the potential to be employed in microwave devices. The NSPT model was used to explain the sample conduction process. The Pr_0.5Ce_0.5FeO₃ material have an important negative TCR value. This result suggests that our perovskite is a good candidate for infrared radiation detection. The frequency-dependent behavior of dielectric constants in our sample can be interpreted based to Maxwell-Wagner’s interfacial polarization theory. The as -elaborated sample display direct optical transition based on the Tauc method. The estimated E_u value for our sample is 0.698 eV. This lower value, implies that our material exhibits minimal disorder and demonstrates a lower localized states within its structure.