Abstract
The influence of solvent volume on the properties of CuInAlS2 (CIAS) thin films deposited using simple and cost-effective nebulizer spray technique is studied. The polycrystalline CIAS thin films with tetragonal structure have been observed from the XRD results. SEM images show nanoflake-like structure on the film surface. The elemental presence and its chemical composition were examined by XPS and EDS. The deposited CIAS film for different solvent volume exhibited p-type semiconductor. Cyclic voltammetry, electrochemical impedance spectroscopy, and Tafel polarization measurements demonstrated that CIAS counter electrodes are capable of tri-iodide reduction process. The performances of photocurrent density-voltage for the CIAS CE exhibited the maximum efficiency of 2.55% with the short-circuit current density of 7.22 mA cm−2.
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Acknowledgements
The authors would like to record their sincere thanks to the University Grants Commission, New Delhi for providing financial support through Major Research Project Scheme (MRP) [F.no.42-903/2013(SR)]. The authors also acknowledge Dr. R. Ramesh Babu, Assistant Professor, School of Physics, Bharathidasan University, Tiruchirappalli-24, for extending the Hall measurement facilities established under the DST grant (D.O.No.SR/S2/CMP-35/2004). One of the authors, Dr. S. K. Panda, would like to thank the Department of Science and Technology (DST), Government of India, for the financial support (Project no: SB/FT/CS-048/2012).
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Ravi Dhas, C., Jennifer Christy, A., Venkatesh, R. et al. Solvent volume-driven CuInAlS2 nanoflake counter electrode for effective electrocatalytic tri-iodide reduction in dye-sensitized solar cells. J Solid State Electrochem 22, 2485–2497 (2018). https://doi.org/10.1007/s10008-018-3941-z
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DOI: https://doi.org/10.1007/s10008-018-3941-z