Photovoltaic Characteristics and Impedance Spectroscopy Analysis of the Dye-Sensitized Solar Cells With Modified Photoelectrodes by Zn2SnO4/TiO2 Fibrous Nanocomposites

This study primarily focuses on the efficiency of dye-sensitized solar cells (DSSCs), i.e., naturally sensitized solar cells, which were enhanced through the implementation of Zn $_\text{2}$ SnO $_\text{4}$ compounds and zinc stannate (Zn $_\text{2}$ SnO $_{{\text{4}}}$ )/titanium dioxide (TiO $_{{\text{2}}}$ ) nanofiber (NF) composites into the photoanode. The DSSCs’ photoanode properties of Zn $_{{\text{2}}}$ SnO $_{{\text{4}}}$ compounds and Zn $_{{\text{2}}}$ SnO $_{{\text{4}}}$ /TiO $_{{\text{2}}}$ NFs were also investigated using a variety of characterization techniques, including electrochemical impedance spectroscopy (EIS), X-ray diffraction (XRD), incident photon current efficiency (IPCE) measurement, and J – V characterization, and. The findings demonstrate that adding Zn $_{{\text{2}}}$ SnO $_{{\text{4}}}$ compound and Zn $_{{\text{2}}}$ SnO $_{{\text{4}}}$ /TiO $_{{\text{2}}}$ NF composite to the photoanode enhances the DSSCs’ photovoltaic (PV) capabilities. The photoanode decorated with Zn $_{{\text{2}}}$ SnO $_{{\text{4}}}$ /TiO $_{{\text{2}}}$ NFs displayed improved photoelectric conversion efficiency (PCE) ( $\eta $ ) in contrast to the reference TiO $_{{\text{2}}}$ photoanode. The PV conversion efficiency ( $\eta $ ) has been reported to increase by around 51.07%. Based on these findings, the study demonstrates that Zn $_{{\text{2}}}$ SnO $_{{\text{4}}}$ /TiO $_{{\text{2}}}$ NFs can be considered as candidate materials for boosting DSSCs’ PV efficiency.