High efficiency MAPbI3−xClx perovskite solar cell via interfacial passivation

Abstract

The trap states at the interface between perovskite and charge-transport layer have a great influence on the performance of perovskite solar cells. Here, a high efficiency MAPbI_3−xCl_x perovskite solar cell has been demonstrated, by introducing a thin layer of LiF or PbF₂ between the SnO₂/perovskite. Improved charge collection and reduced interfacial charge recombination are realized, leading to remarkable rises of both open-circuit voltage (V_oc) and short-circuit current (J_sc). This successful interfacial passivation paved a new way to fabricate high performance perovskite solar cells with large V_oc.