This research is being conducted to learn more about various compounds and their potential uses in various fields such as renewable energy, electrical conductivity, the study of optoelectronic properties, the use of light-absorbing materials in photovoltaic device thin-film LEDs, and field effect transistors (FETs). AgZF3 (Z = Sb, Bi) compounds, which are simple, cubic, ternary fluoro-perovskites, are studied using the FP-LAPW and low orbital algorithm, both of which are based on DFT. Structure, elasticity and electrical and optical properties are only some of the many features that can be predicted. The TB-mBJ method is used to analyze several property types. An important finding of this study is an increase in the bulk modulus value after switching Sb to Bi as the metallic cation designated as “Z” demonstrates the stiffness characteristic of a material. The anisotropy and mechanical balance of the underexplored compounds are also revealed. Our compounds are ductile, as evidenced by the calculated Poisson ratio, Cauchy pressure, and Pugh ratio values. Both compounds exhibit indirect band gaps (X-M), with the lowest points of the conduction bands located at the evenness point X and the highest points of the valence bands located at the symmetry point M. The principal peaks in the optical spectrum can be understood in light of the observed electronic structure.

In the quest for advanced materials with diverse applications in optoelectronics and energy storage, we delve into the fascinating world of halide perovskites, focusing on SiAuF₃ and SiCuF₃. Employing density functional theory (DFT) as our guiding light, we conduct a comprehensive comparative study of these two compounds, unearthing their unique structural, electronic, elastic, and optical attributes. Structurally, SiAuF₃ and SiCuF₃ reveal their cubic nature, with SiCuF₃ demonstrating superior stability and a higher bulk modulus. Electronic investigations shed light on their metallic behavior, with Fermi energy levels marking the boundary between valence and conduction bands. The band structures and density of states provide deeper insights into the contributions of electronic states in both compounds. Elastic properties unveil the mechanical stability of these materials, with SiCuF₃ exhibiting increased anisotropy compared to SiAuF₃. Our analysis of optical properties unravels distinct characteristics. SiCuF₃ boasts a higher refractive index at lower energies, indicating enhanced transparency in specific ranges, while SiAuF₃ exhibits heightened reflectivity in select energy intervals. Further, both compounds exhibit remarkable absorption coefficients, showcasing their ability to absorb light at defined energy thresholds. The energy loss function (ELF) analysis uncovers differential absorption behavior, with SiAuF₃ absorbing maximum energy at 6.9 eV and SiCuF₃ at 7.2 eV. Our study not only enriches the fundamental understanding of SiAuF₃ and SiCuF₃ but also illuminates their potential in optoelectronic applications. These findings open doors to innovative technologies harnessing the distinctive qualities of these halide perovskite materials. As researchers seek materials that push the boundaries of optoelectronics and energy storage, SiAuF₃ and SiCuF₃ stand out as promising candidates, ready to shape the future of these fields.

Researchers in science and industry are increasingly interested in conductive textiles. In this article, we have successfully prepared conductive textiles by applying a graphite dispersion to cotton fabric using a simple brush-coating-drying method and the solvents of dimethyl sulfoxide, dimethyl formamide, and a solvent mixture of both. The sheet resistance of the resulting cotton fabrics could be influenced by the type of polar solvent used to prepare the graphite dispersion and the concentration of graphite. In addition, the graphite cotton fabrics showed semiconductive behavior upon studying the resistance at different temperatures. A flexible strain sensor was fabricated using these graphite cotton fabrics for human motion detection. Most importantly, the resulting strain sensor functions even after 100 bending cycles, indicating its excellent reproducibility. In addition, our results have also shown that these graphite cotton fabrics can be used as electrical interconnects in electrical circuits without any visible degradation of the conductive cotton. Finally, a cotton electrical cycle switch was made using the graphite cotton fabrics and worked in the on and off state.

The growing demand for sustainable energy and the environmental drawbacks of lead-based perovskites have led to the emergence of lead-free double perovskites as promising alternatives. In this work, first-principles calculations based on density functional theory (DFT) are employed to systematically investigate the structural, mechanical, electronic, optical, and thermodynamic properties of fluoride-based double perovskites A₂InAgF₆ (A = Na, K, and Rb). Structural analysis confirms that all three compounds are stable in the cubic space group, with negative formation energies. Mechanical evaluations demonstrate that all three compounds satisfy the Born-stability criteria and exhibit ductile behavior. Electronic band structure calculations reveal that these materials are direct bandgap semiconductors, with bandgaps increasing from 3.02 eV for Na₂InAgF₆ to 3.88 eV for Rb₂InAgF₆ using the Hybrid-HSE06 functional. Furthermore, the materials exhibit low reflectivity and strong optical absorption in the UV range, alongside stable thermodynamic profiles at high temperature. These findings highlight the potential of A₂InAgF₆ compounds for next-generation optoelectronic, photovoltaic, and thermoelectric applications.