<p>Perovskite solar cells (PSCs) have demonstrated remarkable lab-scale efficiencies exceeding 26%, yet their commercial deployment is significantly hindered by the limitations of the electron transport layer (ETL). Conventional ETLs, such as TiO₂ and SnO₂, often present a “trilemma” of mismatched energy levels, low electron mobility, and poor environmental stability, which collectively cap device performance and durability. Bridging the gap to commercial viability requires fundamental innovations in ETL design. This perspective reviews and contextualizes several advanced material strategies aimed at solving this trilemma. A diverse range of solutions is emerging, including doped or modified metal oxides like SnO₂, fully organic ETLs, quantum dots, and 2D materials. A particularly promising approach involves creating synergistic organic-inorganic hybrid materials. As a central example, we explore XTiO₃-polymer hybrids, where the favorable dielectric and chemical properties of inorganic perovskite titanates are enhanced by the tunable electronic and surface-passivating functions of polymers. These advanced materials, compatible with scalable manufacturing, highlight a broader trend toward multifunctional, composite ETLs. Ultimately, we position these diverse strategies as part of a critical toolkit for developing the next generation of efficient, stable, and commercially viable PSCs.</p>