Layered Fe-doped SrLaInO4 perovskite electron transport layer for dye-sensitized solar cell with high open-circuit voltage

This study presents the synthesis of SrLaInO4 perovskite oxides using a high-temperature solid-phase method under atmospheric pressure, with varying Fe-doping concentrations incorporated during fabrication. The synthesized particles underwent characterization using X-ray diffraction and electron microscopy, revealing a layered crystal structure. X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy were employed to confirm the successful incorporation of Fe into the SrLaInO4 crystal structure. Significantly, Fedoping was observed to broaden the light absorption range of the perovskite oxide whilst simultaneously reducing the bandgap. When employed as the electron transport layer in dye-sensitized solar cells, Fe-doped SrLaInO4 perovskite exhibited a maximum efficiency of 4.64%, alongside an open-circuit voltage (VOC) of 0.801 V, which was noticeably higher than that observed in identically-prepared cells employing TiO2 as the electron transport layer.

Automated summary

This study synthesized SrLaInO4 perovskite oxides with varying Fe-doping concentrations using a high-temperature solid-phase method. Characterization techniques such as X-ray diffraction and electron microscopy revealed a layered crystal structure. Fe-doping was found to widen the light absorption range and decrease the bandgap of the perovskite oxide. In dye-sensitized solar cells, Fe-doped SrLaInO4 perovskite showed a maximum efficiency of 4.64% and a higher open-circuit voltage (VOC) of 0.801 V compared to cells using TiO2 as the electron transport layer.