Flexible perovskite solar cells based on the metal–insulator–semiconductor structure

Abstract

The metal–insulator–semiconductor (MIS) structure is applied to perovskite solar cells, in which the traditional compact layer TiO₂ is replaced by Al₂O₃ as the hole blocking material to realize an all-low-temperature process. Flexible devices based on this structure are also realized with excellent flexibility, which hold 85% of their initial efficiency after bending 100 times.