The Department of Physics at the College of Science, University of Mosul, discussed a master’s thesis entitled “Study of the Optical and Structural Properties of Bismuth Oxide Thin Films Deposited on Porous Silicon”, submitted by the student Ahmed Badal Qaso, on Thursday, 5 March 2026.

The thesis focused on the preparation and investigation of the structural and optical properties of bismuth oxide (Bi₂O₃) thin films deposited on porous silicon prepared by the electrochemical etching technique. The films were fabricated using the chemical spray pyrolysis method, with various deposition parameters being systematically modified.

The results demonstrated an improvement in crystallinity and variations in the optical band gap depending on the deposition conditions, indicating a clear relationship between the structural characteristics and optical properties of the films. The study also highlighted the potential applicability of this system in solar cells, diodes, and photodetector technologies.

The examination committee was chaired by Professor Dr. Yahya Abdul Karim Salman, and included Assistant Professor Dr. Idrees Aidan Ghadeer and Assistant Professor Dr. Rana Ziyad Abdul Fattah as members. The thesis was supervised by Assistant Professor Dr. Abdulkhaliq Ayoub Sulaiman, who also served as a committee member.

The research aligns with several United Nations Sustainable Development Goals (SDGs), particularly:

• SDG 7: Affordable and Clean Energy
• SDG 9: Industry, Innovation and Infrastructure
• SDG 13: Climate Action

through its contribution to scientific research in clean energy technologies and advanced materials.

At the conclusion of the defense, the committee commended the thesis for its high scientific quality and significant findings in the fields of advanced materials physics, nanotechnology, and semiconductor science, emphasizing its practical applicability in industrial and technological sectors, particularly in optoelectronic devices and renewable energy technologies.

The College of Science extends its best wishes to its students for continued success and academic excellence.