A cooperative research team from Beijing University of Chemical Technology and Linköping University introduce a redox energy barrier management strategy to enhance the performance of narrow-bandgap tin-lead (Sn-Pb) perovskite solar cells (PerSCs). The key innovation involves using 1,1′-bis(diphenylphosphino)ferrocene (DPPF), an organometallic complex, to protect Sn²⁺ from oxidation and passivate defects in the perovskite layer.
Key Findings:
This work provides a holistic approach to mitigating Sn²⁺ oxidation and defect-related losses in Sn-Pb perovskites, offering a pathway to bridge the performance gap with pure-lead perovskites and advance tandem solar cell technology.
National Science Review
Experimental study