Perovskite solar cells (PSCs) have gained popularity in the energy storage area owing to their ease of manufacturing, extended diffusion lengths, cost-effectiveness, and excellent efficiency. Notably, the power conversion efficiency of PSCs has reached an impressive 25.7% using FAPbI3 as the active layer. Current research is focused on enhancing the open-circuit voltage and fill factor through the utilization of alternative interfaces, charge-selective contacts, and innovative perovskite material shapes. Grain size, homogeneity, and covering area are important factors affecting PSC performance, and they all have a major effect on the perovskite solar cell's power conversion efficiency (PCE). Moreover, the stability and degradation mechanisms of these devices are closely associated with their structural design, highlighting the importance of tailored device architectures. This book chapter highlights the advancements in the structural development of PSCs, including the implementation of advanced interfacial layers and their impact on performance, while also addressing the challenges that continue to impede the efficiency of PSCs.