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Author: search.filters.author.Thiangkaew, Anongnad

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    A Flexible plastic-stainless steel dye-sensitized solar cell based on organic T-/T2 electrolyte
    (2014-03-25)
    Pimanpang, Samuk
    ;
    Towannang, Madsakorn
    ;
    Thiangkaew, Anongnad
    ;
    Maiaugree, Wasan
    ;
    Uppachai, Pikaned
    SUMMARY: Flexible dye-sensitized solar cells (DSSCs) were fabricated using a TiO<inf>2</inf> film coated on stainless steel (TiO<inf>2</inf>/SS) as the working electrode and a Pt film coated on conductive plastic (Pt/plastic) as the counter electrode. Thin Pt film was deposited on conductive plastic specimens for four different deposition times (30, 60, 90 and 120s) using an electrochemical deposition process. Scanning electron micrographs of the resulting Pt films showed that Pt nanoparticles formed on conductive plastic. The DSSC characteristics were analyzed by illuminating light on the counter electrode. The performance of the cell with 30s of Pt deposition (30s-Pt) showed the highest DSSC efficiency, ~2.72%. Cell efficiency decreased with the duration of Pt deposition (or Pt thickness). This is attributed to the reduced transmittance through the thicker Pt films, which is supported by UV-visible spectroscopic measurements. © 2013 John Wiley & Sons, Ltd.
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    Chemically deposited polypyrrole-nanoparticle counter electrode for inorganic I -/I 3 - and organic T -/T 2 dye-sensitized solar cells
    (2012-12-01)
    Towannang, Madsakorn
    ;
    Pimanpang, Samuk
    ;
    Thiangkaew, Anongnad
    ;
    Rutphonsan, Phikun
    ;
    Maiaugree, Wasan
    Pure polypyrrole (PPy) and composited PPy-nanoparticles (multiwall carbon nanotubes (MWCNTs), nickel (Ni) or, titanium dioxide (TiO <inf>2</inf>)) films were coated on conductive glass by a chemical deposition method. They were used as dye-sensitized solar cell counter electrodes. The performance of pure PPy based dye-sensitized solar cells (DSSCs) was ∼6.00% and ∼2.81% for I <sup>-</sup>/I <inf>3</inf> <sup>-</sup> and T <sup>-</sup>/T <inf>2</inf> electrolytes, respectively. The efficiencies increased after MWCNTs and Ni nanoparticle incorporation for both electrolytes, but decreased with TiO <inf>2</inf> addition. PPy-MWCNTs DSSCs delivered the highest efficiency; ∼7.20% and ∼3.19% for I <sup>-</sup>/I <inf>3</inf> <sup>-</sup> and T <sup>-</sup>/T <inf>2</inf> electrolytes, respectively. The improvement of the energy conversion efficiency after MWCNTs and Ni incorporation is attributed to an increase in the electrode surface area and/or a reduction of charge-transfer resistance at the electrolyte/counter electrode interface. © 2012 Elsevier B.V.