The circuitry landscape of perovskite solar cells: An in-depth analysis

The extensive research and development in perovskite solar cells (PSCs) have rekindled the hopes of converting solar energy into electricity. An elusive understanding of underlying mechanisms is required for the development of efficient PSCs. Over the years, Impedance Spectroscopy (IS) characterization, along with complementary techniques, has proven to be an effective way to understand and analyze the charge transport and recombination at interface and bulk of PSCs. The IS of PSCs have been analyzed, interpreted, and improvised continuously, revealing intricate details about the work. However, there is a lack of centralized source of these details, which make it tougher to account for the generalized approach to understand the device properties. The present work is focused on compiling the research done on various PSC device architectures via IS to construct a comprehensive foundation of information on impedance plots, equivalent circuits, and associated processes.