Journal
ELECTROCHIMICA ACTA
Volume 137, Issue -, Pages 661-667Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2014.06.025
Keywords
Dye-sensitized solar cell (DSSC); Counter electrode; Inverse opal; poly(3,4-ethylene dioxythiophene) (PEDOT)
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Funding
- Korean Ministry of Education, Science, and Technology through the Institute of Basic Science (IBS) program
- Priority Research Center Program [2009-0093814]
- Basic Science Research Program through the NRF - Ministry of Education [2013R1A1A2061636]
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An inverse-opal poly(3,4-ethylene dioxythiophene) (PEDOT) electrode was fabricated by electrodeposition of EDOT onto a PEDOT:poly(styrene sulfonate) filler in a self-assembled polystyrene template. By this novel fabrication method, the inverse-opal electrode was directly assembled into a dye-sensitized solar cell (DSSC) as a Pt-free counter electrode without any additional processing. This inverse-opal PEDOT electrode exhibits superior electrocatalytic activity and easy electrolyte diffusion in the electrode, as the inverse-opal electrode provides a porous morphology. The improved reflectivity of the inverse-opal electrode was also observed in the incident-photon conversion-efficiency spectra at low wavelength, which was a characteristic of its well-ordered structure. Therefore, the inverse-opal PEDOT electrode could successfully act as an alternative counter electrode for DSSCs to replace Pt in the counter electrode. (C) 2014 Elsevier Ltd. All rights reserved.
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