What are the key mechanical properties that affect the performance and longevity of Perovskite Solar Cells?
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The key mechanical properties that affect the performance and longevity of Perovskite Solar Cells (PSCs) include the optomechanical reliability of the perovskite–substrate heterointerfaces, the mechanical integrity of the electron-transport layer (ETL)–perovskite heterointerfaces, and the mechanical properties of the interfaces between the ETL and the 3D metal-halide perovskite (MHP) thin film, as well as between the 3D-MHP thin film and the hole-transport layer (HTL) . The presence of grain-boundary grooves (GBGs) in the perovskite film can significantly impact the optomechanical reliability of the heterointerfaces and the overall PSC performance . Incorporating a dual-dynamic cross-linking network, such as natural polymerizable small molecule α-lipoic acid (LA), can enhance the mechanical stability of flexible PSCs and improve their photovoltaic efficiency . Additionally, reinforcing the interfaces between the ETL and the 3D-MHP thin film, as well as between the 3D-MHP thin film and the HTL, can enhance the mechanical properties and optoelectronic properties of the PSCs, leading to improved power conversion efficiency, operational stability, and mechanical reliability .
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