ИСТИНА

Despite significant advancements over the past decade, the commercialization of perovskite solar cells remains hindered by their low operational stability, primarily due to ion migration under photogenerated electric fields. This report presents the findings of a comparative experimental study examining the durability of various perovskite absorber compositions in relation to electric field-induced aging. The study demonstrates that formamidinium cations exhibit significantly higher resistance to electric fields than methylammonium cations. Phase segregation induced by univalent cations has been observed in multication perovskite films subjected to electric field exposure. Additionally, the report discusses the influence of charge transport layer composition and structure on the stability of inverted perovskite solar cells under operational conditions. Cells fabricated with PTAA and NiOx/PTAA interlayers showed the highest stability, due to the superior chemical inertness of PTAA to other device components. For electron transport layers based on fullerene derivatives, the primary cause of efficiency degradation during field-induced aging was identified as the formation of pinhole-type defects, resulting from molecular agglomeration.