Abstract:
Inorganic perovskite solar cells are considered promising candidates for the top cell in perovskite/silicon tandem solar cells. However, there is currently a limited number of related reports, primarily due to the significant non-radiative recombination occurring at both the surface and within inorganic perovskite films, which constrains the enhancement of power conversion efficiency (PCE) in these devices. In this study, 2-amino-5-bromobenzamide (ABB) was incorporated into the precursor solution of inorganic perovskite to modulate the crystallization process of the resulting film. Following this approach, we observed a reduction in pinhole density on the surface of the inorganic perovskite film, a decrease in defect state density, and suppression of non-radiative recombination. The air-prepared inverted inorganic perovskite solar cells achieved a PCE of 19.24% and demonstrated notable improvements in stability.