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Topic

Scalable fabrication of formamidinium lead triiodide perovskite solar cells in ambient air

Department of Chemistry

Date & location

• Friday, April 25, 2025
• 9:00 A.M.
• Elliott Building, Room 228

Examining Committee

Supervisory Committee

• Dr. Makhsud Saidaminov, Department of Chemistry, University of Victoria (Supervisor)
• Dr. David Leitch, Department of Chemistry, UVic (Member)
• Dr. Arthur Blackburn, Department of Physics and Astronomy, UVic (Outside Member)

External Examiner

• Dr. Timothy Kelly, Department of Chemistry, University of Saskatchewan

Chair of Oral Examination

• Prof. Martin Segger, Department of Art History and Visual Studies, UVic

Abstract

Formamidinium lead iodide (FAPbI₃)-based perovskite solar cells (PSCs) have emerged as highly promising candidates for next-generation photovoltaic technologies, owing to their ideal optoelectronic properties, narrow bandgap, and superior thermal stability. However, challenges such as phase instability, defect formation, and the need for scalable fabrication techniques remain significant barriers to their commercialization. This work aims to address these issues through a comprehensive study on the stabilization of the photoactive α-FAPbI₃ phase and the development of ambient-compatible scalable fabrication methods.

To stabilize the α-FAPbI₃ phase, small ions doping strategies using heterovalent and homovalent additives—specifically bismuth (Bi³⁺) and cadmium (Cd²⁺)—are investigated. The influence of these dopants on the crystallographic structure, photophysical properties, and defect passivation is systematically analyzed. Furthermore, a scalable blade-coating technique is employed to fabricate high-quality FAPbI₃ thin films under ambient air conditions, bridging the gap between laboratory-scale research and industrial-level production. The work provides a comprehensive evaluation of doping-induced improvements in phase stability, film morphology, and photovoltaic performance. Additionally, the impact of precursor stoichiometry on crystal growth mechanisms is explored to provide insights into optimizing perovskite material quality. The integration of small ions doping and blade-coating techniques offers a promising pathway toward the commercial realization of efficient, stable, and scalable FAPbI₃-based perovskite solar cells in ambient air.