Perovskite Solar Cells: Exploring Electron Transporting Layer in Combination with a Polyelectrolyte for n‐i‐p Perovskite Solar Cells (Adv. Mater. Interfaces 17/2020)

An ultrathin poly(ethylenimine) ethoxylated (PEIE) layer inserted underneath alters the work function and surface energy of the top SnO2 surface. This PEIE/SnO2 electron transport composite structure demonstrates negligible energy mismatch at the interface leading to high performance perovskite photovoltaic devices. More details can be found in article number 2000412 by Chunjun Liang, Zhiqun He, and co-workers.