Abstract
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, Fe-doping 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.
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