Recent Advances in Interface Engineering for Enhanced Open-Circuit Voltage Regulation in Perovskite Solar Cells

In recent years, perovskite solar cells (PSCs) have attracted significant attention due to their excellent photoelectric properties. However, several key performance parameters of these devices still fall short of their theoretical limits. Among these parameters, the regulation of open-circuit voltage (VOC) has been a focal point of intensive research efforts, playing a pivotal role in advancing the efficiency of PSCs. This review first provides an overview of the generation and loss mechanism of VOC. It then discusses the significance of interface engineering in VOC regulation. Recent developments in high-efficiency PSCs realized via interface engineering have been summarized and categorized into three key areas: surface modification, interface structure optimization, and surface dimensional engineering. Finally, a comprehensive summary of past research in this domain and offered insights into the future prospects of enhancing VOC in PSCs is provided. Perovskite solar cells (PSCs) always face the issue of open circuit voltage loss (Vloss). In this review, the principle of reducing Vloss is discussed theoretically, combing a large number of experiments, three feasible technical paths to reduce Vloss are divided from the perspective of Interface Engineering. A summary of the past research and outlooks for a bright future is stated at the end.image