Enhanced Carrier Extraction and Photostability in Perovskite Solar Cells via Band-Engineered Sb 2 O x /TiO 2 Bilayer Heterojunction

Key Points

• This research aims to enhance electron extraction and photostability in perovskite solar cells using a band-engineered bilayer heterojunction.
• Development of band-engineered Sb2Ox/TiO2 bilayer heterojunctions.
• Comparison of these heterostructures to conventional single-layer electron transport layers.
• Evaluation of carrier extraction efficiency and recombination suppression at the perovskite/ETL interface.
• The bilayer heterojunctions exhibited improved electron extraction compared to single-layer ETLs.
• Significant reduction in recombination losses was observed.
• Enhanced photostability of the perovskite solar cells was achieved.