Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)
Publication date: 16th December 2024
Low-dimensional perovskites are currently in the spotlight as some of the most promising materials of our century. Due to their structural versatility and tunable optical properties, they gained significant attention in the photovoltaic and optoelectronic fields. [1]
However, stability remains a critical challenge, limiting their practical applications. Literature studies have investigated ammonium-based 2D perovskites, emphasizing the role of organic cations in tuning material properties. Recent advancements have highlighted imidazole-based ligands as promising additives for overcoming challenges such as moisture sensitivity and ion migration, providing a pathway to more robust perovskites. Still, imidazoles as cations have not yet been explored, and their potential remains untapped. [2], [3]
In this contribution, we report the use of imidazolium-based cations with alkyl chains of 4, 8, and 10 carbon atoms in perovskite structures. The synthesis involved ligand preparation followed by perovskite formation. The resulting products were characterized using optical spectroscopy, XRD, solid-state NMR, and were compared with the corresponding ammonium-based lead iodide 2D structures. Our results suggest three distinct structural frameworks and lay the foundation for exploring imidazolium and similar derivatives as cations. Future efforts will focus on designing and testing alternative ligands to further optimize 2D perovskite performance and explore new functionalities.
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