Abstract
Single wall carbon nanohorns (SWCNH) functionalized poly 3,4-ethylene dioxythiophene:Polystyrene sulphonate (PEDOT:PSS) composites were developed by reaction of PEDOT:PSS with different weight ratio (0.05, 0.1, 0.2, 0.3, 0.4 wt%) of SWCNH, used as counter electrodes for dye sensitized solar cells (DSSC). Transmission electron microscopy confirms “dahlia” like flowers or buds, having an overall diameter of tens of nm. Cyclic-voltammetric studies of 0.3 wt% composite gives faster I−/I3 − reaction rate, high surface area. Electrochemical impedance spectroscopy revealed series resistance (RS) and charge transfer resistance (Rct) of 0.3 wt% composite DSSC of 20.93, 83.79 Ω respectively, these values were lower compared with the other DSSCs. Photocurrent density–voltage measurements shown the enhanced conversion efficiency (η) of 4.70 % for 0.3 wt% composite, whereas for pure PEDOT:PSS η = 3.66 % and pristine SWCNH of η = 1.94 %. The improved conversion efficiency was due to the combinational superior electrocatalytic activity, reduced RS, Rct. This study reveals PEDOT:PSS with SWCNH composite films were possible low cost catalysts for DSSC applications.
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Acknowledgments
This work was financially supported by the Science and Engineering Research Board (SERB), Department of Science and Technology (DST), India, through fast track scheme for young scientist award (# SR/FTP/PS-111/2010). Author M.R. Grateful to Prof. Prathap Haridoos, IIT, Madras for provide of SWCNH.
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Susmitha, K., Mamatha Kumari, M., Naresh Kumar, M. et al. Carbon nanohorns functionalized PEDOT:PSS nanocomposites for dye sensitized solar cell applications. J Mater Sci: Mater Electron 27, 4050–4056 (2016). https://doi.org/10.1007/s10854-015-4261-z
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DOI: https://doi.org/10.1007/s10854-015-4261-z