Abstract
AbstractPerovskite solar cells (PSCs) have garnered significant interest due to their potential for high performance at low cost. While single‐junction PSCs have surpassed 26% efficiency, they are nearing their theoretical limits. Introducing dual absorber layers can broaden the spectral absorption range, enhancing performance. This study explores a zero‐dimensional/three‐dimensional (0D/3D) bilayer structure combining three‐dimensional (3D) FAPbI3 with zero‐dimensional (0D) cesium tin triiodide (CsSnI3) quantum dots (QDs) as an interfacial modification layer. The CsSnI3 QDs establish a cascade energy level structure, improving charge transfer efficiency at the perovskite‐hole transport layer (HTL) interface. Their narrow bandgap enhances light absorption efficiency, boosting hole extraction and short‐circuit current density. Incorporating CsSnI3 QDs into PSCs significantly improves the power conversion efficiency from 22.99% to 25.72% compared to 3D perovskite solar cells without the CsSnI3 QD interlayer. Also, surface‐passivated CsSnI3 QDs with hydrophobic ligands provide moisture resistance and interfacial passivation, increasing stability. Using perfluorooctanoic acid (PFA) to modify CsSnI3 QDs further enhances moisture resistance, allowing PSCs to maintain 85% of initial efficiency for over 60 days at 25% relative humidity without encapsulation, demonstrating significant stability improvements. The incorporation of CsSnI3 QDs in PSCs notably increases power conversion efficiency.
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