Homogenizing hole-selective contacts for centimeter-square flexible perovskite/Cu(In,Ga)Se₂ tandems.

ABSTRACT: Flexible perovskite/Cu(In,Ga)Se₂ (CIGS) tandems offer a path to high-efficiency and lightweight photovoltaics. However, simultaneously achieving high efficiency and mechanical durability remains a challenge. A contributing factor is the interfacial inhomogeneity arising from molecular aggregation in planar carbazole-based hole-selective contacts (HSCs) on flexible substrates. Here, we develop a strategy of spatial steric hindrance that transforms planar carbazole core into a three-dimensional π-conjugated skeleton. This molecular reconfiguration suppresses intermolecular π-π stacking, yielding homogenized selective contacts and high-quality perovskite films. When integrated into flexible monolithic perovskite/CIGS tandem devices, this strategy enabled a champion stabilized power

SUBMITTER: Zhou J 

PROVIDER: S-EPMC12577700 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature