Perovskite Monocrystals for Advanced Applications: Synthetic Approaches and Working Mechanisms

In the past decade, metal halide perovskites have emerged as promising alternatives to traditional semiconductors, holding great potential for photovoltaics but also for diverse semiconductor-based applications. However, their practical implementation has been impeded by challenges related to performance and stability. To overcome these obstacles, precise control over the crystallization and grain boundaries of these materials is essential.<br/><br/>In this work, we present innovative techniques for implementing and passivating device-oriented perovskite monocrystals, including laser-based passivation of macrocrystal surfaces and in-situ fabrication of nanocrystals via humidity-induced methods. Through a comprehensive investigation of the physical properties of these monocrystals, we explore their impact on diverse applications such as photovoltaic devices and memristors. Leveraging the robustness of monocrystalline systems, we develop an impedance spectroscopy model to analyze the phase dispersion resulting from ionic modulation, providing valuable electrical insights that can be extrapolated to polycrystalline thin-film devices. Our study contributes to the advancement of high-performance metal halide perovskite devices by elucidating crucial factors that influence their performance and offering potential solutions to enhance their functionality.