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Polyethyleneoxide (PEO)-based, anion conducting solid polymer electrolyte for PEC solar cells

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Abstract

Solid polymer electrolyte membranes were prepared by complexing tetrapropylammoniumiodide (Pr4N+I−) salt with polyethylene oxide (PEO) plasticized with ethylene carbonate (EC), and these were used in photoelectrochemical (PEC) solar cells fabricated with the configuration glass/FTO/TiO2/dye/electrolyte/Pt/FTO/glass. The PEO/Pr4N+I−+I2 = 9:1 ratio gave the best room temperature conductivity for the electrolyte. For this composition, the plasticizer EC was added to increase the conductivity, and a further conductivity enhancement of four orders of magnitude was observed. An abrupt increase in conductivity occurs around 60–70 wt% EC; the room temperature conductivity was 5.4 × 10−7 S cm−1 for 60 wt% EC and 4.9 × 10−5 S cm−1 for the 70 wt% EC. For solar cells with electrolytes containing PEO/Pr4N+I−+I2 = 9:1 and EC, IV curves and photocurrent action spectra were obtained. The photocurrent also increased with increasing amounts of EC, up to three orders of magnitude. However, the energy conversion efficiency of this cell was rather low.

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Acknowledgments

Research support from IRQUE project Faculty of Applied Sciences, Rajarata University of Sri Lanka and IPPS, Sweden are gratefully acknowledged.

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Authors and Affiliations

  1. Faculty of Science and Postgraduate Institute of Science, University of Peradeniya, Peradeniya, Sri Lanka

    T. M. W. J. Bandara, M. A. K. L. Dissanayake, O. A. Ileperuma, K. Varaprathan & K. Vignarooban

  2. Department of Physical Sciences, University of Rajarata, Mihintale, Sri Lanka

    T. M. W. J. Bandara

  3. Department of Applied Physics, Chalmers University of Technology, 412 96, Göteborg, Sweden

    T. M. W. J. Bandara & B.-E. Mellander

Authors
  1. T. M. W. J. Bandara
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  2. M. A. K. L. Dissanayake
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  3. O. A. Ileperuma
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  4. K. Varaprathan
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  5. K. Vignarooban
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  6. B.-E. Mellander
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Corresponding author

Correspondence to T. M. W. J. Bandara.

Additional information

Contribution to ICMAT 2007, Symposium K: Nanostructured and bulk materials for electrochemical power sources, July 1–6, 2007, Singapore.

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Bandara, T.M.W.J., Dissanayake, M.A.K.L., Ileperuma, O.A. et al. Polyethyleneoxide (PEO)-based, anion conducting solid polymer electrolyte for PEC solar cells. J Solid State Electrochem 12, 913–917 (2008). https://doi.org/10.1007/s10008-007-0461-7

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  • DOI: https://doi.org/10.1007/s10008-007-0461-7

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