Sang Il Seok is a Distinguished Professor in the Department of Energy and Chemical Engineering at the Ulsan National Institute of Science and Technology (UNIST) in Korea. He obtained his Ph.D. in the Department of Inorganic Materials Engineering from Seoul National University in KoreaPrior to joining UNIST in 2015, he served as the principal investigator of the Korea Research Institute of Chemical Technology (KRICT) and as a professor at the Department of Energy Science at Sungkyunkwan University. Throughout his career, he has received several awards for his outstanding contributions. In 2017, he was honored with the prestigious "Korean Scientist Award" by the Korean government. In 20019, he was awarded the Kyung-Ahm Prize. Notably, in 2022, his groundbreaking work in perovskite solar cells led to him being honored with the esteemed Rank Prize, solidifying his position as one of the pioneering scientists in this area.

Title: Advancing Perovskite Solar Cells: A Pathway to Unprecedented Efficiency

Abstract: Over the past decade, there has been a rapid increase in the power conversion efficiency (PCE) of perovskite solar cells (PSCs) achieved primarily through optimizing various key aspects of the device. One crucial aspect is the optimization of the device architecture, which involves maximizing light absorption, minimizing losses due to recombination, and optimizing charge transport by designing the different layers and interfaces of the PSC. In the fabrication of high-efficiency PSCs, the electron transporting layer plays a vital role, particularly in the nip architecture. Additionally, the uniform thin film deposition process is another critical factor. The quality and uniformity of the perovskite layer significantly impact the device's performance. By optimizing the deposition process, a high-quality perovskite layer can be ensured. For instance, the incorporation of alkylammonium chloide (RACl) such as methylammonium chloride (MACl) can enhance the crystallinity and homogeneity of the perovskite film, leading to improved device performance. RACl is believed to control the crystallization process of perovskite, thus contributing to the enhanced performance. Our research has primarily focused on expanding the role of RACl, and in this presentation, I will mainly discuss the outcomes of our recent work on the coating of FAPbI3 perovskite thin.