Doping Electron Transporting Layer: An Effective Method to Enhance J_SC of All-Inorganic Perovskite Solar Cells

All-inorganic metal-halide CsPbBr₃ perovskite has emerged as an attractive photovoltaic material for its outstanding environmental stability. However, due to the wide bandgap, the performance of CsPbBr₃ perovskite solar cells (PSCs) is limited, especially for the short-circuit current density (J_SC). In this issue of Energy & Environmental Materials, Guo et al. employed Nb-doped SnO₂ as electron transporting layers (ETLs), which could greatly improve the J_SC of the PSCs based on all-inorganic CsPbBr₃.