| Abstract Scope |
Due to rapid progress in recent years, the power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) have become comparable to that of crystalline silicon devices. Yet, the reliance on small-scale fabrication techniques has slowed the commercialization of this technology. This work examines inkjet printing and antisolvent bathing as scalable alternatives to traditional fabrication techniques. It was found that piezoelectric printing parameters, substrate surface energy, and ink rheology affect film formation, as well as the resulting microstructure. Multiple passes of ink increased perovskite grain size, which is credited to the redissolving of homogeneous nucleation sites. Of all the antisolvents tested, only films submerged in diethyl ether resulted in a dense microstructure, due to its immiscibility with DMSO. Stability was further improved through the addition of polyvinylpyrrolidone, which reacted with dangling perovskite bonds. The champion device recorded a PCE of 16.2% and retained 73% of its initial PCE over 30 days. |