Assist. Prof. Dr. Fikadu Geldasa | Best Researcher Award

Walter Sisulu University | South Africa

Dr. Fikadu Takele Geldasa is an Assistant Professor of Physics at Walter Sisulu University, South Africa, and Oda Bultum University, Ethiopia. He has published 19 Scopus-indexed research papers, received more than 323 citations, and holds an h-index of 6. He obtained his Ph.D. in Materials Physics from Adama Science and Technology University. His research focuses on experimental and computational studies of functional nanomaterials using density functional theory (DFT) and materials characterization techniques. Dr. Geldasa works on the structural, electronic, and optical properties of doped metal oxides, perovskites, and semiconductor materials for applications in photocatalysis, energy conversion, and environmental remediation. His recent works on doped TiO₂ and α-NiS nanostructures provide insights into bandgap engineering and defect tuning for enhanced visible-light photocatalytic activity. He has published his research in leading journals such as Scientific Reports, Nanomaterials, Materials, and Physica Scripta. His interdisciplinary research integrates theory and experiment to develop advanced materials for renewable energy and sustainable technology. Through his scientific contributions, Dr. Geldasa is establishing himself as a promising researcher in materials physics and computational materials science, contributing significantly to the progress of clean energy and environmental technologies.

Featured Publications

Geldasa, F. T., Dejene, F. B., Kebede, M. A., Hone, F. G., & Jira, E. T. (2025). Density functional theory study of chlorine, fluorine, nitrogen, and sulfur doped rutile TiO₂ for photocatalytic application. Scientific Reports, 15(1), 3390. https://doi.org/10.1038/s41598-024-84316-0

Geldasa, F. T., & Dejene, F. B. (2025). Transition metal doping effects on the structural, mechanical, electronic, and optical properties of α-NiS for photocatalysis applications via DFT + U insights. Applied Physics A. https://doi.org/10.1007/s00339-025-08942-9

Geldasa, F. T., & Dejene, F. B. (2025). First principles investigation of niobium and carbon-doped titanium dioxide for enhanced visible light photocatalytic activity. ChemistrySelect. https://doi.org/10.1002/slct.202504529

Geldasa, F. T., & Dejene, F. B. (2025). Exploration of vanadium and rhenium co-doped TiO₂ for enhanced photocatalytic performance via first principle density functional theory investigation. Physica Scripta. https://doi.org/10.1088/1402-4896/adf156

Geldasa, F. T., & Dejene, F. B. (2025). Density functional theory based exploration of structural, electronic, mechanical, thermodynamic, and optical properties of α-NiS for CO₂ adsorption. Journal of Physics: Condensed Matter. https://doi.org/10.1088/1361-648X/aded5f

Mr. Asif Khan | Best Researcher Award

University of Science and Technology Bannu KPK | Pakistan

Dr. Asif Nawaz Khan is a Pakistani physicist and lecturer at the University of Science and Technology Bannu (USTB), specializing in computational materials science. He is currently pursuing a Ph.D. in Physics at USTB, after completing an M.Phil. from Gomal University and an M.Sc. from Kohat University. Since 2009, he has been actively involved in teaching, supervising BS and M.Phil students, and guiding research in computational simulations and solar cell device modeling. His research focuses on the design and analysis of lead-free perovskite materials (3D and 2D) and their structural, optical, thermoelectric, elastic, thermodynamic, and phonon properties, along with molecular dynamics studies. He employs advanced simulation tools including WIEN2k, Quantum Espresso, CASTEP, and SCAPS-1D, and applies machine learning techniques for material property prediction. Dr. Khan has co-authored multiple high-impact publications, currently holding an h-index of 3 with 38 citations, reflecting his contributions to clean energy materials and sustainable photovoltaics. His work advances the understanding and development of efficient, stable, and multifunctional energy materials. Overall, Dr. Khan is committed to advancing computational materials research and training the next generation of scientists in energy and optoelectronic applications.

Profile : Google Scholar

Featured Publications

Khan, A., Khan, N. U., Nawaz, A., Ullah, K., & Manan, A. (2024). A DFT study to explore structural, electronic, optical and mechanical properties of lead-free Na₂MoXO₆ (X= Si, Ge, Sn) double perovskites for photovoltaic and optoelectronic applications. Computational and Theoretical Chemistry, 1240, 114834. https://doi.org/10.1016/j.comptc.2024.114834

Hosen, A., Mousa, A. A., Nemati-Kande, E., Khan, A. N., Abu-Jafar, M. S., … (2025). Systematic computational screening and design of double perovskites Q₂LiMH₆ (Q= K, Rb; M= Ga, In, Tl) for efficient hydrogen storage: A DFT and AIMD approach. Surfaces and Interfaces, 106608. https://doi.org/10.1016/j.surfin.2025.106608

Khan, A. N., Rabhi, S., Jehangir, M. A., Charif, R., Khan, N. U., Begagra, A., … (2025). Evaluating A₂SrGeI₆ (A= K and Rb) lead-free double perovskites: Structural, elastic, and optoelectronic insights for clean energy. Inorganic Chemistry Communications, 174, 113949. https://doi.org/10.1016/j.inoche.2025.113949

Khan, N. U., Ghani, U., Khan, A., Khan, A. N., Ullah, K., Ali, R., & Fadhali, M. M. (2025). Theoretical insight into stabilities and optoelectronic properties of RbZnX₃ (X=Cl, Br) halide perovskites for energy conversion applications. Optical and Quantum Electronics, 57(1), 109. https://doi.org/10.1007/s11082-025-04789-1

Rabhi, S., Khan, A. N., Chinoune, O., Charif, R., Bouri, N., Al-Qaisi, S., … (2025). Insight into NaSiCl₃: A lead-free perovskite for the next generation revealed by DFT and SCAPS-1D. Physical Chemistry Chemical Physics, 27(25), 13490–13507. https://doi.org/10.1039/D5CP02345A

Assist. Prof. Dr. Fikadu Geldasa | Best Researcher Award

Assist. Prof. Dr. Fikadu Geldasa | Best Researcher Award

Walter Sisulu University | South Africa

Profiles : Scopus | Orcid | Research Gate | Google Scholar

Featured Publications