Perovskite/perovskite/silicon triple-junction solar cells: progress, challenges, and perspectives

Abstract

Perovskite/perovskite/silicon triple-junction solar cells are a rapidly developing technology in multi-junction photovoltaics and metal halide perovskite research, driven by their potential to exceed the power conversion efficiency (PCE) limits of current technologies. Despite this promise, their performance and operational stability remain notably behind their two-junction counterparts. In this perspective, we provide a comprehensive analysis of this complex device architecture from three key perspectives, by focusing on the device configuration and the distinct roles of the perovskite top and middle cells. We highlight recent progress, identify the fundamental bottlenecks, and outline key research directions that could unlock significant improvements in both PCE and long-term stability.