Title: Cesium halide perovskite solar cells – performance and stability studies.
Abstract: Perovskite Solar cells (PSCs) are an up-and-coming technology in the world of renewable energy. These new-generation devices have captured attention thanks to their impressive optoelectrical properties, such as high absorption coefficient, balanced charge transport properties, and high defect tolerance. Since their debut in 2009, the number of research groups working on this technology has skyrocketed, leading to a remarkable improvement of photo-conversion efficiency (PCE). Recent best-performing single-junction PSCs have reached a certified PCE of 26.1%, matching the best silicon solar cells, the mainstream solar cell technology. Moreover, the Perovskite/silicon tandem cells are now just below 34%, surpassing the gallium-arsenide two-junction devices. This seminar will focus mainly on Cesium-based halide perovskites, which are large bandgap semiconductors and can be used as a top cell for tandem devices. Topics such as performance improvement through various architecture and interface modifications and long-term stability studies of these devices will be presented.
Bio: Arkadi Akopian is a PhD candidate at Iowa State University. He obtained his bachelor’s degree in Electrical Engineering from the Free University of Tbilisi, Georgia, as well as a master’s degree in Artificial Intelligence from the Georgian Technical University. Arkadi joined Iowa State University in 2021 as a master’s student under the Fullbright Scholarship. His focus was in semiconductors, specifically perovskite solar cells. After completing his master’s degree, Arkadi has continued working on perovskite solar cell research for his doctoral degree.
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