A self-assembled CuS–MXene bridge for hole-boosting 10.51%-efficiency all-inorganic tri-brominated perovskite solar cells

A charge delocalized CuS–Mxene composite is used as a hole extractor to form an interface charge transport bridge and passivate the defects of perovskite film, which helps the CsPbBr 3 PSCs achieve a champion PCE up to 10.51% and excellent stability.