Controlling Crystallization in Lead-Tin and Tin-Based Perovskites for Solar Cells and Neuromorphic Devices

Metal halide perovskites, renowned for their exceptional optoelectronic properties, have emerged as promising candidates for next-generation semiconductor materials, addressing critical challenges such as the energy crisis and the increasing demands of information technology. Building on these advantages, perovskite solar cells have achieved significant advancements in recent years, while perovskite memristors have also risen as a promising frontier. However, the path toward commercialization remains hindered by several challenges, including large-scale production, material toxicity, long-term stability, and other factors.
In this thesis, we present the first exploration of blade coating technology for fabricating high-efficiency, stable, and low-toxicity lead-tin (Pb-Sn) and tin (Sn)-based perovskite solar cells, achieving efficiencies exceeding 16% and 10%, respectively. These results rank among the highest efficiencies for large-scale production methods. Additionally, we investigated the use of non-toxic solvents for perovskite device fabrication. Moreover, low-dimensional Pb-Sn perovskites were applied to memristors for the first time, exhibiting repeatable and highly stable memristive properties with potential applications in neuromorphic computing. The excellent performance of these devices contributes to advancing sustainable and multifunctional applications of metal halide perovskites.