Overcoming Two Key Challenges in Monolithic Perovskite‐Silicon Tandem Solar Cell Development: Wide Bandgap and Textured Substrate—A Comprehensive Review

Abstract 33.7% of power conversion efficiency (PCE) in monolithic perovskite‐silicon tandem solar cells (PSTSCs) is an eye‐catcher. Still, the issues emerging from their two main requirements, wide band gap (WBG) perovskites and textured substrates, trigger phase segregation, voltage deficit, perovskite strain, high recombination rates, shunt paths, etc. In addition, the ill‐defined relations of most of these issues to the WBG perovskites and silicon texture originating from the conflicting research outcomes have become severe impediments to developing PSTSCs. From this perspective, an overview of the recently developed monolithic PSTSCs discussing the major hurdles in their up‐scaling, stabilities, and commercialization is presented.