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rGO Sheets/ZnFe2O4 Nanocomposities as an Efficient Electro Catalyst Material for I3−/I− Reaction for High Performance DSSCs

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Abstract

In this paper, Reduced Graphene Oxide (rGO)/ZnFe2O4 (rZnF) nanocomposite is synthesized by a simple hydrothermal method and employed as a counter electrode (CE) material for tri-iodide redox reactions in Dye sensitized solar cells (DSSC) to replace the traditional high cost platinum (Pt) CE. X-ray diffraction analysis and High resolution Transmission electron microscopy, clearly indicated the formation of rZnF nanocomposite and also amorphous rGO sheets were smoothly distributed on the surface of ZnFe2O4 (ZnF) nanostructure. The rZnF-50 CE shows excellent electro catalytic activity toward I3− reduction, which has simultaneously been confirmed by cyclic voltammetry, electrochemical impedance spectroscopy and Tafel polarization measurements. A DSSC developed by rZnF-50 CE (η = 8.71%) obtained quite higher than the Pt (η = 8.53%) based CE under the same condition. The superior performances of rZnF-50 CE due to addition of graphene in to Spinel (ZnF) nanostructure results in creation of highly active electrochemical sites, fast electron transport linkage between CE and electrolyte. Thus it’s a promising low cost CE material for DSSCs.

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Authors and Affiliations

  1. Department of Physics, Loyola College, Chennai, 600034, India

    V. Anto Feradrick Samson, S. Bharathi Bernadsha, Albin John P. Paul Winston, D. Divya, James Abraham, M. Victor Antony Raj & J. Madhavan

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  1. V. Anto Feradrick Samson
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  2. S. Bharathi Bernadsha
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  3. Albin John P. Paul Winston
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Correspondence to V. Anto Feradrick Samson.

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Samson, V.A.F., Bernadsha, S.B., Paul Winston, A.J.P. et al. rGO Sheets/ZnFe2O4 Nanocomposities as an Efficient Electro Catalyst Material for I3−/I− Reaction for High Performance DSSCs. J Inorg Organomet Polym 32, 1183–1189 (2022). https://doi.org/10.1007/s10904-021-02182-z

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