Comparative Study on the Photovoltaic Properties of Dye-Sensitized Solar Cells (DSCs) Based on Different Counter Electrode Configurations

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T. O. Ahmed
N. Alu
A. Y. Abdul Rahman


Previously, we reported an investigation on Delonix regia dye extract as a natural sensitizer for TiO2/DSC assembled with platinum counter electrode and low power conversion efficiency was recorded. This necessitated the current investigation on Delonix regia dye extract as a natural sensitizer for TiO2/DSCs assembled with different counter electrodes. Platinum counter electrode was used for one of the DSCs while polyaniline (PANI) was used to replace platinum in the other DSC. The vitriol treated PANI thin film consisted of aniline mixed with potassium dichromate directly reacted on circular graphite foam. The conductivity and Hall coefficient were measured to be and respectively using ECOPIA Hall Effect Measurement System (HMS-3000 Version 3.52). Sequel to this, the DSCs were assembled and characterized using a standard overhead Veeco viewpoint solar simulator equipped with AM 1.5 filter to give a solar radiation of 1000 W/m2 and coupled to a Keithley source meter (model 4200SCS) which was connected to the computer via GPIB interface for data acquisition. The overall solar power conversion efficiencies of 0.02% and 0.04% were obtained for TiO2-DSC//Delonix regia dye//platinum electrode and TiO2-DSC//Delonix regia dye//PANI electrode respectively. Delonix regia dye extract proved to be rather a poor sensitizer as can be seen by the low spectral absorption at lower energies with short circuit current density of 0.10mAcm-2 and 0.11mAcm-2 respectively. Nevertheless, a 10% decrease in the electron recombination via redox electrolyte and collection at the photoelectrode was observed for TiO2-DSC//Delonix regia dye//PANI electrode and a 20% increase in the open circuit voltage (Voc) was also observed. Finally, about 37% increase in the fill factor was observed for the TiO2-DSC//Delonix regia dye//PANI electrode over TiO2-DSC//Delonix regia dye//platinum electrode. This necessitated approximately 50% increase in the power conversion efficiency for the TiO2-DSC//Delonix regia dye//PANI electrode over TiO2-DSC//Delonix regia dye//platinum electrode.

Delonix regia dye extract, PANI counter electrode, TiO2-DSC, short circuit current density, open circuit voltage, fill factor, power conversion efficiency

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Ahmed, T. O., Alu, N., & Abdul Rahman, A. Y. (2019). Comparative Study on the Photovoltaic Properties of Dye-Sensitized Solar Cells (DSCs) Based on Different Counter Electrode Configurations. Journal of Materials Science Research and Reviews, 3(2), 1-9. Retrieved from
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Brabec CJ, Sariciftci S, Hummelen JC. Plastic solar cells. Advanced Functional Materials. 2001; 1:15.

Ameri T, Dennler G, Lungenschmied C, Brabec J. Organic Tandem cells, Energy Environ. Sci. 2009;2:347.

Li J, Grimsdale AC. Carbazole-based polymer for organic photovoltaic cells. Chem. Soc. Rev. 2010;39:2399.

Hagfeldt A, Boschoo G, Sun L, Kloo L, Pettersson H. Dye-sensitized solar cells. Chem. Rev. 2010;110(10):6595-6663.

Ahmed TO, Akusu PO, ALU N, Abdullahi MB. Dye-sensitized solar cells based on TiO2 nanoparticles and Hibiscus sabdariffa. British Journal of Applied Science and Technology (BJAST). 2013;3(4):840-846.

Gratzel M. Dye-sensitized solar cells. Journal of Photochemistry and Photobiology C: Photochemistry Reviews. 2003;4:145.

Daeneke T, Kwon T, Holmes AB, Duffy NW, Bacch U, Spiccia L. High-efficiency dye-sensitized solar cells with ferrocene-based electrolytes. Nature Chem. 2011;3(3):211-215.

Yella A, Lee H, Tsao HN, Yi C, Chandiran AK, Nazeerudin MK, Diau EW, Yeh C, Zakeeruddin SM, Gratzel M. Porphyrin-sensitized solar cells with cobalt (II/III)-based redox electrolyte exceed 12% Efficiency. Science. 2011;334:629.

O’Regan B, Gratzel M. A low cost, high efficiency solar cell based on dye sensitized colloidal TiO2 films. Nature. 1991;353:737.

Bach U, Lupo D, Comte P, Moser JE, Wiessortel F, Salbeck J, Spreitzer H, Gratzel M. Solid-state dye-sensitized mesoporous TiO2 solar cells with high photon-to-electron conversion efficiencies. Nature. 1998;395:583.

Diamant Y, Chen SG, Melamed O, Zaban A. Core-shell nanoporous electrode for dye sensitized solar cells: The effect of the SrTiO3 shell on the electronic properties of the TiO2 core. J. Phys. Chem. B. 2003;107:1977-1981.

Sayer RA, Hodson SL, Fisher TS. Improved efficiency of dye-sensitized solar cells using a vertically aligned carbon nanotube counter electrode. J. Solar Energy Engin. 2010;132(2): 021007-021011.

Rahman MM, Kojima R, Fihry MEF, Tadaki D, Ma T, Kimura Y, Niwano M. Effect of porous counter electrode with highly conductive layer on dye-sensitized solar cells. Japanese Journal of Applied Physics. 2011;50(8).

Thomas S, Deepak TG, Anjusree GS, Arun TA, Nair SV, Nair AS. A review on counter electrode materials in dye-sensitized solar cells. Journal of Material Chemistry A. 2014;13.

Li Q, Wu J, Tang Q, Lan Z, Li P, Lin J, Fan L. Application of microporous polyaniline counter electrode for dye-sensitized solar cells. Electrochemistry Communications. 2008;10(9):1299-1302.

Wang G, Zhuo S, Xing W. Graphene/polyaniline nanocomposite as counter electrode of dye-sensitized solar cells. Materials Letters. 2012;69:27-29.

Dwivedi G, Guncha MG, Bhaskarwar AN. Natural dye-sensitized solar cells with polyaniline counter electrode. International Proceedings of Chemical, Biological and Environmental Engineering. 2015;90.

Park KH, Kim SJ, Gomes R, Bhaumik A. High performance dye-sensitized solar cell by using porous polyaniline nanotubes as counter electrode. Chemical Engineering Journal. 2015;260: 393-398.

Hao S, Wu J, Huang Y, Lin J. Natural dyes as photosensitizers for dye-sensitized solar cell. Solar Energy. 2006;80:209.

Ooyama Y, Harima Y. Photophysical and electrochemical properties, and molecular structures of organic dyes for dye-sensitized solar cells. Chem. Phys. Chem. 2012;13(18):4032–80.

Gratzel M. Solar energy conversion by dye-sensitized photovoltaic cells. Inorganic Chemistry. 2005;44:6841.