KES5-1545
Molecular Engineering for Efficient and Stable Perovskite Solar Cells
When and Where
Sep 29, 2026
17:05 - 17:30
Presenter(s)
Jangwon Seo (Korea Advanced Institute of Science and Technology (KAIST))
Co-Author(s)
Abstract
Organic small molecules and polymers are essential functional materials in perovskite solar cells (PSCs), serving as hole transport materials (HTMs), additives, surface passivator, and interfacial modifiers. Representative HTMs include Spiro-OMeTAD, PTAA, P3HT, and self-assembled monolayer (SAM) molecules. In addition, Lewis base molecules and salt-type molecules have been widely employed as additives and surface passivators to regulate the crystallization process and suppress defect formation in perovskite films, thereby improving the optoelectronic properties of PSCs. Among them, alkyl or aromatic ammonium salt-based molecules have attracted considerable attention as effective interfacial modifiers because they induce the formation of 2D/3D heterostructures at the perovskite surface, leading to reduced interfacial defects, enhanced charge transport, and improved device stability.
In this talk, recent advances in hole transport materials and dopant-additive systems for achieving efficient and stable perovskite solar cells will be discussed. Furthermore, interfacial engineering strategies for controlling the surface properties of perovskite films at the HTL/perovskite interface will be introduced. Particular emphasis will be placed on the formation and modulation of 2D/3D heterostructures using Ruddlesden–Popper (RP)-type and Dion–Jacobson (DJ)-type spacer molecules with diverse molecular architectures, and their effects on interfacial properties, charge transport, and overall photovoltaic performance.
In this talk, recent advances in hole transport materials and dopant-additive systems for achieving efficient and stable perovskite solar cells will be discussed. Furthermore, interfacial engineering strategies for controlling the surface properties of perovskite films at the HTL/perovskite interface will be introduced. Particular emphasis will be placed on the formation and modulation of 2D/3D heterostructures using Ruddlesden–Popper (RP)-type and Dion–Jacobson (DJ)-type spacer molecules with diverse molecular architectures, and their effects on interfacial properties, charge transport, and overall photovoltaic performance.
