Background
Yunseong Choi received his Ph.D. from the Ulsan National Institute of Science and Technology (UNIST), South Korea, in 2023. His doctoral dissertation is titled 'Vacuum Deposition Engineering toward Highly Efficient, Stable, and Scalable Perovskite Solar Cells.' His research focuses on understanding the vacuum deposition-based perovskite growth mechanism and developing high-performance, large area perovskite solar cells. His research interests also include perovskite-based tandem solar cells and perovskite-based optoelectronic devices.
Research interests
My research is focused on advancing perovskite solar cells (PSCs), particularly through innovative vacuum deposition techniques, contributing significantly to the enhancement of their efficiency, stability, and scalability.
I optimized the properties and quality of vacuum-deposited perovskite films to achieve highly efficient and stable PSCs. Furthermore, my work has involved developing all-vacuum-deposited PSCs in collaboration with vacuum-deposited hole transport layer (HTL), utilizing novel materials such as spiro-OMeTAD, PTAA, and self-assembled monolayer (SAM)-derivatives, which are specially modified for the vacuum deposition process. The development of all-vacuum-deposited PSCs has been extended to large-area single-PSCs and modules, minimizing efficiency loss during scale-up to areas as large as 2,500 mm². Additionally, my work encompasses the demonstration of vacuum-deposited perovskite-based tandem solar cells, including perovskite-silicon and perovskite-CIGS tandem cells. Beyond PSCs, my research includes studies on the integration of two-dimensional materials (such as graphene and transition-metal dichalcogenide) with silicon Schottky junction solar cells, as well as solution-processed PSCs and organic photovoltaics, accompanied by thorough material, device, and film characterization.
