Abstract
The growing demand for commercial-scale perovskite solar cells has necessitated the development of large-area devices. However, scaling-up often introduces more defect states that hinder performance. Here, we present a novel anion additive, zinc trifluoromethanesulfonate (Zn(OTF)2), designed to effectively passivate defects in large-area (48 cm2) carbon-based perovskite solar cells printed in ambient air. Our findings demonstrate that the unique molecular structure of Zn(OTF)2 allows the oxygen atoms in the −SO3 group to selectively and strongly interact with uncoordinated Pb2+ defects on the perovskite surface. This passivation not only reduces the density of defect states but also induces a p-type transition in the perovskite, facilitating hole collection and transport. Consequently, we observe a significant enhancement in power conversion efficiency, from 9.64 % to 14.80 %, accompanied by improved long-term stability. This work introduces a new molecular design strategy for defect passivation additives, paving the way for the development of high-performance, large-area perovskite solar cells that are poised for commercialization.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call