Abstract
Solar energy has emerged as a promising renewable energy source, drawing significant attention worldwide. Among various photovoltaic materials, perovskite (PVK) stands out as one of the most promising candidates for solar energy harvesting. My research focuses on optimizing high-performance perovskite solar cells (PSCs) by addressing key challenges to industrialization through innovative material design and process engineering. My key contributions are as follows: 1. Hole Transport Layer (HTL) Innovation: I developed a dual-oxidant atomic layer deposition (ALD) technique using ozone and water to fabricate high-quality films. This approach enables high reaction rates and controlled surface hydroxylation, resulting in PSCs that achieve 21.2% efficiency and maintain 80% of their initial performance after 500 hours of continuous light soaking. 2. Blade Coating and Additive Engineering in Ambient Conditions: I optimized the blade coating process and vacuum-assisted quenching under ambient conditions. Additionally, the introduction of as a chloride-based additive significantly reduced trap-state density and extended carrier lifetime. This enabled the fabrication of PSCs with 23.9% efficiency and mini modules reaching 18.0%. By integrating synergistic ALD processing, blade coating techniques and chloride additive incorporation, this work significantly improves both the efficiency and operational stability of PSCs. These results lay a strong foundation for the scalable, low-cost manufacturing of high-performance perovskite photovoltaics.