Transparent Electrodes with Enhanced Infrared Transmittance for Semitransparent and Four-Terminal Tandem Perovskite Solar Cells

This report addresses indium oxide doped with titanium and tantulum with high near-infrared transparency to potentially replace the conventional indium tin oxide transparent electrode used in semitransparent perovskite devices and top cells of tandem devices. The high near-infrared transparency of this electrode is possibly explained by the lower carrier concentration, suggesting less defect sites that may sacrifice its optical transparency. Incorporating this transparent electrode into semitransparent perovskite solar cells for both the top and bottom electrodes improved the device performance through possible reduction of interfacial defect sites and modification in energy alignment. With this indium oxide-based semitransparent perovskite top cell, we also demonstrated four-terminal perovskite-silicon tandem configurations with improved photocurrent response in the bottom silicon cell.

Automated summary

This report discusses indium oxide doped with titanium and tantulum as a high near-infrared transparent electrode potentially replacing traditional indium tin oxide electrodes. Utilizing this electrode in semitransparent perovskite devices can improve device performance by reducing defect sites and modifying energy alignment. Additionally, incorporating this indium oxide-based electrode in both top and bottom electrodes of semitransparent perovskite solar cells can enhance photocurrent response and performance in tandem configurations.