Perovskite Materials, Cahfx3 (X= S, Se) For Energy Harvesting Applications: A Theoretical Investigation

Abstract

The effects of transition metals on the structural, elastic, electrical, hardness, optical, and thermal properties of CaHfX3 (X= S, Se) were explored using a DFT-based which is the first-principles method. Over the first time, electronic band structures, Fermi levels, Vickers hardness, Mulliken population analysis, and optical and thermodynamic characteristics are estimated. When the enhanced unit cell parameters are compared to existing theoretical besides experimental values they match well. Using the Born criteria to derive single-crystal elastic constants it is possible to estimate the mechanical stability of these substances. CaHfX3 (X= S, Se) molecules have a total density of 9.15, 6.77, 6.37, and 5.83 states/unit cells at CaHfX3 (X= S, Se) compounds have hardness values of 10.71, 12.44, 8.52, and 16.80 GPa, respectively. In this case, CaHfS3 is the stiffest compound studied in this paper. CaHfS3 and CaHfSe3 compounds may be examined as potential choices for cutting and shaping tools owing to their somewhat ductile and very rigid properties in comparison to other standard hard coating materials. CaHfS3 might be used as a Thermal Barrier Coating (TBC) despite its low thermal conductivity, Debye temperature, and damage-tolerant nature. Several anisotropy calculations show that the structural anisotropy of the compounds is correct (shear anisotropic factors, percentage anisotropy factors, and universal anisotropic index). Using known representations, many optical functions (such as dielectric constants, refractive index, photoconductivity, absorption, loss function, and reflectivity) are computed and analysed. The reflectance of the compounds is often more than 50%, with no obvious difference in the near-infrared, visible, or near-ultraviolet ranges (up to 6 eV). Consequently, the compounds provide good coating materials for reducing solar heating.