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The effect of TiO2 photo anode film thickness on photovoltaic properties of dye-sensitized solar cells

Authors:

J.M.K.W. Kumari ,

National Institute of Fundamental Studies, Kandy and Postgraduate Institute of Science, University of Peradeniya, Peradeniya, LK
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N. Sanjeevadharshini,

Eastern University of Sri Lanka, Vantharumoolai, Chenkalady, LK
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M.A.K.L. Dissanayake,

National Institute of Fundamental Studies, Kandy and Postgraduate Institute of Science, University of Peradeniya, Peradeniya, LK
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G.K.R. Senadeera,

National Institute of Fundamental Studies, Kandy, Postgraduate Institute of Science, University of Peradeniya, Peradeniya and Department of Physics, The Open University of Sri Lanka, Nawala, Nugegoda, LK
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C.A. Thotawatthage

National Institute of Fundamental Studies, Kandy, and Postgraduate Institute of Science, University of Peradeniya, Peradeniya, LK
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Abstract

Nanocrystalline titanium dioxide (TiO2) photoanodes with four different film thicknesses from 5.57μm to 20.65μm were prepared by doctor-blade technique. Performance of dye sensitized solar cells (DSSCs) fabricated with these photoanodes were studied using current-voltage characteristics and incident photon-to-current conversion efficiency (IPCE) measurements. Electrochemical impedance spectroscopy (EIS) was used to analyze the effect of TiO2 film thickness on the charge transfer resistance and electron life time in the solar cells. Voltage decay measurements were used to study the recombination process of photo generated charge carriers. These studies revealed that the photovoltaic properties of DSSCs largely depend on the film thickness of TiO2 photoanode. Further, the DSSCs fabricated using a TiO2 film of 12.73 μm thickness exhibited the best photovoltaic performance with highest incident photon-to-current conversion efficiency, highest short-circuit photocurrent, lowest charge transfer resistance, highest electron life time and lowest recombination life time.

How to Cite: Kumari, J. M. K. W., Sanjeevadharshini, N., Dissanayake, M. A. K. L., Senadeera, G. K. R., & Thotawatthage, C. A. (2016). The effect of TiO2 photo anode film thickness on photovoltaic properties of dye-sensitized solar cells. Ceylon Journal of Science, 45(1), 33–41. DOI: http://doi.org/10.4038/cjs.v45i1.7362
Published on 22 Jun 2016.
Peer Reviewed

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