Effect of aromatic nitrogen heterocycles treatment on the interface between perovskite and the hole transport material in perovskite solar cells

摘要

Solution-processed hybrid perovskite solar cells (PSCs) have attracted considerable attention as a promising alternative for solar cells due to their high power conversion efficiencies (PCEs), easy fabrication, and low cost. In particular, the interfacial properties of perovskite/electron transport layer and perovskite/hole transport layer have significant impact on the solar cell performances, because the charge extraction, carrier transport and recombination are affected by the interfaces. Recently, the passivation of the interfaces with pyridine as Lewis base was reported.1