| Abstrakt: |
Recently, Pt-free counter electrodes (CEs) have emerged as cost-effective alternatives for components in dye-sensitized solar cells (DSSCs), garnering significant interest in the field. In this regard, we have developed a novel hybrid composite consisting of 2D spinel phase CdFe2O4 and 2D reduced graphene oxide (rGO) nanosheets through a one-step ultrasonic-assisted hydrothermal method to serve as the CE for dye-sensitized solar cells. The crystallinity, morphology and textural properties of the composites were analyzed in detail using X-ray diffraction, scanning electron microscopy (FE-SEM), Transmission electron microscope, N2 adsorption–desorption, X-ray photo electron spectroscopy techniques. The findings obtained through electrochemical impedance spectroscopy, cyclic voltammetry and Tafel polarization measurements indicated that the CdFe2O4/rGO demonstrated robust electrocatalytic activity, enabling effective I−/I3− redox reactions and notably reduced charge transfer resistance in comparison with pristine CdFe2O4. Specifically, the DSSC utilizing the CdFe2O4/rGO CE attains a power conversion efficiency of 8.52%, significantly surpassing the efficiencies of 4.02%, 5.21%, and 6.64% observed in solar cells employing CdFe2O4, CdFe2O4-rG1, and CdFe2O4-based counter electrodes, respectively. Therefore, the CdFe2O4/rGO hybrid composite serves as a cost-effective alternative to high-cost Pt as a CE, thereby facilitating cost-efficiency in DSSCs in the future. [ABSTRACT FROM AUTHOR] |
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