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Concentration effect of multiwalled carbon nanotube and poly(3, 4-ethylenedioxythiophene) polymerized with poly(4-styrenesulfonate) conjugated film on the catalytic activity for counter electrode in dye sensitized solar cells

Author

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  • Yun, Dong-Jin
  • Ra, Hyemin
  • Rhee, Shi-Woo

Abstract

Conductive and catalytic multiwalled carbon nanotube (MWCNT)/poly(3,4-ethylenedioxythiophene) polymerized with poly(4-styrenesulfonate) (PEDOT:PSS) composite films were prepared by dispersing MWCNT in the PEDOT:PSS aqueous solution using ultrasonication without any oxidation process. The effect of the MWCNT loading in the PEDOT:PSS solution was studied in terms of the conductivity and catalytic activity. The MWCNT/PEDOT:PSS composite films showed much lower sheet resistance in the range of 730–2150 Ω/□ and higher surface roughness in the range of 25–110 nm than the pure PEDOT:PSS film (980 kΩ/□ and 0.82 nm) depending on the MWCNT content in the composite. The high conductivity and roughness of MWCNT/PEDOT:PSS films enhanced its performance as a catalytic counter electrode in the dye-sensitized solar cell (DSSC). The interface resistance between the MWCNT/PEDOT:PSS film and the electrolyte was evaluated with electrochemical impedance spectroscopy (EIS) and it was confirmed that as the content of MWCNT in PEDOT:PSS solution was increased, the resistance was decreased. The cell efficiency of DSSC with MWCNT/PEDOT:PSS counter electrode was highly improved as the MWCNT concentration in MWCNT/PEDOT:PSS film increases and especially, the DSSC with FTO-free spray coated MWCNT/PEDOT:PSS counter electrode showed excellent sell performance (Jsc: 10.9 mA/cm2, F.F.: 60.6% and n: 5.4%), which is comparable with that with platinum on FTO counter electrode system (Jsc: 13.9 mA/cm2, F.F.: 62.8% and n: 7.1%).

Suggested Citation

  • Yun, Dong-Jin & Ra, Hyemin & Rhee, Shi-Woo, 2013. "Concentration effect of multiwalled carbon nanotube and poly(3, 4-ethylenedioxythiophene) polymerized with poly(4-styrenesulfonate) conjugated film on the catalytic activity for counter electrode in d," Renewable Energy, Elsevier, vol. 50(C), pages 692-700.
    • Handle: RePEc:eee:renene:v:50:y:2013:i:c:p:692-700
    DOI: 10.1016/j.renene.2012.06.056
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    References listed on IDEAS

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    1. Veerappan, Ganapathy & Bojan, Karunagaran & Rhee, Shi-Woo, 2012. "Amorphous carbon as a flexible counter electrode for low cost and efficient dye sensitized solar cell," Renewable Energy, Elsevier, vol. 41(C), pages 383-388.
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