Doping Electron Transporting Layer: An Effective Method to Enhance JS']JSC 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.