Article

First-principles investigation of structural, electronic, mechanical, and optical properties of Tl-based halide perovskites (TlXF3; X = Ti, Zr) for reflective coating applications

AminaDepartment of Physics, Bacha Khan University Charsadda, PakistanMaryam LiaqatDepartment of Computational physics, University of Okara, PakistanSalhah Hamed AlrefaeeDepartment of Chemistry, College of Science, Yanbu-30799, Taibah University, Al-Madina, Saudi ArabiaMuhammad Inam Ul HaqDepartment of Computer Science and Bioinformatics, Khushal Khan Khattak University KarakDilsora AbduvalievaDepartment of Mathematics and Information Technologies, Tashkent State Pedagogical University, Bunyodkor avenue, 27, Tashkent, 100070, UzbekistanNaseem AkhterDepartment of Physics, College of Science, Qassim University, Buraydah 51452, Saudi ArabiaVineet TirthCentre for Engineering and Technology Innovations, King Khalid University, Abha 61421, Asir, Saudi ArabiaAli AlgahtaniMechanical Engineering Department, College of Engineering, King Khalid University, Abha 61421, Asir, Saudi ArabiaAmnah Mohammed AlsuhaibaniDepartment of Sports Health , College of Sport Sciences & Physical Activity, Princess Nourah bint Abdulrahman University, PO Box 84428, Riyadh 11671, Saudi ArabiaMoamen S. RefatDepartment of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif 21944, Saudi ArabiaN. M. A. HadiaDepartment of physics, College of Science, Jouf University, Sakaka 2014, Al-Jouf, Saudi Arabia

Electrochemistry Communicationsjournal2025en

ABI

Abstract

The pursuit of advanced materials to address global energy challenges has directed attention to halide perovskites, known for their promising technological applications. In this study, we investigate the structural, electronic, elastic, and optical properties of Tl-based fluoro-perovskites TlXF 3 (X = Ti, Zr) using density functional theory (DFT) with the Wien2k package. Structural stability is confirmed via tolerance factor analysis, while thermodynamic stability is validated through negative formation energies. Phonon dispersion calculations affirm the dynamic stability of these compounds. The optimized lattice constants are found to be 4.25 and 4.47 Å. Employing the modified Becke-Johnson potential, the electronic band structure and density of states are computed revealing a half-metallic nature of both compounds, with excellent consistency between band structure and density of states findings. In both material the valence and conductions bands are overlapped at Fermi level for spin up configuration while in spin down configuration they have band gap of 4.8 eV and 5.6 eV for TlTiF 3 and TlZrF 3 respectively. Elastic properties show that both TlTiF 3 and TlZrF 3 meet mechanical stability criteria, with TlTiF 3 demonstrating superior resistance to compressive and shear stresses, indicating enhanced mechanical robustness. The elastic analysis further indicates anisotropic, ductile behavior in both compounds. Optical analysis across a broad energy range highlights the potential of these materials for optoelectronic applications, suggesting their suitability for advanced device architectures. This study provides a foundation for further experimental exploration and device innovation in the field of halide perovskites. • Physical characteristics of halide Perovskites (TlXF₃; X = Ti, Zr) compounds were investigated by the DFT method. • Materials exhibit stable cubic perovskite structures, confirmed by tolerance factors and formation energy calculations. • IR Elast package is used for computation of elastic constant. • The structural, electronic, elastic, and optical properties were studied of the above stated compounds.

Topics

Perovskite Materials and Applications Heusler alloys: electronic and magnetic properties Inorganic Chemistry and Materials

Identifiers

DOI: 10.1016/j.elecom.2025.107951

Citations and references

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