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