A Study on the Development Status of Tandem Perovskite Solar Cells

As an ideal renewable energy source, solar energy remains a major focus of technological development. Perovskite solar cells (PSCs) have emerged as a significant direction in solar energy utilization. Among them, regular-structured (n-i-p) perovskite solar cells exhibit advantages such as mature fabrication processes, high energy conversion efficiency, and ease of integration. However, their insufficient environmental stabilityparticularly rapid degradation under humidityremains a critical challenge. To address these issues, the inverted (p-i-n) structure has been developed, offering simplified manufacturing and improved stability. Recently, tandem perovskite solar cells, which combine materials with different bandgaps to broaden light absorption and enhance efficiency, have gained significant research attention. This paper systematically reviews the structural evolution and technological advancements in perovskite solar cells, focusing on optimization strategies for tandem configurations to provide insights for future studies.